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Domestic Ventilation Compliance Guide
2010 Edition(with 2011 amendments)
O N L I N E V E R S I O N
O N L I N E V E R S I O NO N L I N E V E R S I O N
July 2011Department for Communities and Local Government
Domestic Ventilation Compliance Guide2010 Edition
O N L I N E V E R S I O N
O N L I N E V E R S I O N
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ISBN 978 1 85946 378 9Stock code:72349
© Crown Copyright, 2011
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Contents | 3
Contents
Section 1 Introduction 5
1.1 Status of guide 5
1.2 Requirements on air fl ow testing, commissioning and information provision 6
1.3 How to use this guide 7
1.4 Key terms 8
Section 2 Natural ventilation and intermittent extract systems 9
2.1 System 1 – Background ventilators and intermittent extract fans 9
2.2 System 2 – Passive stack ventilation 9
Section 3 Continuous mechanical ventilation systems 24
3.1 System 3 – Continuous mechanical extract: centralised and de-centralised 24
3.2 System 4 – Continuous mechanical balanced systems with heat recovery: centralised and single room 24
Section 4 System completion and handover 53
4.1 Documentation to be handed over to the end user 53
Section 5 Inspection checklist and air fl ow measurement test sheet 55
5.1 Checking design against measured air fl ow rates 55
5.2 Instrument calibration 56
5.3 Demonstrating compliance 56
Part 1 – System details and declarations 57
Part 2a – Installation details 58
Part 2b – Inspection of installation 59
Part 3 – Air fl ow measurement test and commissioning details 61
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Section 1 Introduction | 5
Section 1
Introduction
This guide provides detailed guidance to help persons comply with requirements in building regulations for installation, inspection, testing, commissioning and provision of information when installing fi xed ventilation systems in new and existing dwellings. The aim is to ensure the provision of adequate ventilation while minimising energy use and environmental problems such as noise and thermal discomfort.
It is important to note that the guide covers a range of frequently occurring situations but it is not exhaustive and alternative means of achieving compliance with the ventilation requirements in the Building Regulations may be possible.
1.1 Status of guide
Building regulations contain functional requirements, such as requirements that buildings must be structurally stable, must be constructed and fi tted out to ensure reasonable levels of fi re protection, and must be reasonably energy effi cient. These functional requirements are often drafted in broad terms, and so it may not always be immediately clear to a person carrying out building work how to comply with the relevant requirements. Consequently documents are often issued by the government department responsible for building regulations which provide practical guidance on ways of complying with specifi c aspects of building regulations in some of the more common building situations. In England and Wales, these documents are called Approved Documents.
Approved Documents are intended to provide practical guidance but they are not intended to be comprehensive. Consequently there may be references in Approved Documents to other documents which will provide more detailed information and assistance on parts of the guidance. This guide is one of those documents. It provides additional detail in relation to the guidance about compliance with the requirements for installation, inspection, testing, commissioning and provision of information in Approved Documents F, L1A and L1B which apply when installing fi xed ventilation systems in new and existing dwellings.
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It is important to note that following the guidance in an Approved Document or any guidance referred to by that document does not guarantee compliance with building regulations. If you follow relevant guidance in an Approved Document and in any document referred to which provides additional advice or information to help you follow that guidance (such as this guide), there is a legal presumption that you have complied with building regulations. However, in every case it is for the building control body, whether a private sector approved inspector or the local authority, to decide whether work complies with building regulations. So, you should always check with the building control body before you start work what they consider it is necessary for you to do to comply with building regulations.
1.2 Requirements on air fl ow testing, commissioning and information provision
In England and Wales, requirements for ventilation and energy effi ciency are contained in Part F, Ventilation, and Part L, Conservation of fuel and power, of Schedule 1 to the Building Regulations. This guide provides appropriate guidance for the four types of ventilation system discussed in detail in Approved Document F. It is referenced by Approved Document F (ADF), Approved Document L1A (ADL1A), and Approved Document L1B (ADL1B) as providing guidance on meeting those requirements for ventilation systems.
Specifi c statutory requirements in the Building Regulations for England and Wales which this guide addresses are:
• The requirement to commission mechanical ventilation systems (where they can be tested and adjusted) in accordance with an approved procedure, and to provide a notice confi rming that commissioning has been carried out to the building control body not later than fi ve days after the work has been completed where a person has had to submit a building notice or full plans or, in other cases, not later than 30 days after the completion of work.
• For mechanical ventilation systems in new dwellings only, the requirement to measure air fl ow rates in accordance with an approved procedure, and to provide a notice recording the results and the data on which they are based in an approved manner to the building control body not later than fi ve days after the fi nal test is carried out.
• The requirement to provide suffi cient information about the ventilation system and its maintenance requirements to owners or occupiers so that the ventilation system can be operated to provide adequate air fl ow. This guide contains recommendations on the range of information that could be given to dwelling owners on completion to satisfy this requirement.
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Section 1 Introduction | 7
The approved procedures for commissioning mechanical ventilation systems in dwellings and air fl ow testing of such systems in new dwellings are set out in Tables 2, 6 and 8 according to which ventilation system has been adopted.
The manner in which the results of air fl ow testing and the data on which they are based are to be recorded and given to the building control body is given in Part 3 of Section 5 of this document. A downloadable copy of this form is available at www.planningportal.gov.uk/approveddocuments > Part F (Ventilation) > Associated documents, for the use of those carrying out the air fl ow testing.
In addition to specifying how the above statutory requirements in the Building Regulations should be met, this guide also contains recommendations for an inspection checklist and for recording the equivalent area of background ventilators.
The inspection checklist and air fl ow measurement test and commissioning sheet in Section 5 should be completed by installers and test and commissioning engineers, and should form part of the information pack given to dwelling owners to satisfy the information requirement.
1.3 How to use this guide
The guide refers to Systems 1 to 4 as specifi ed in Approved Document F.
Section 2 provides guidance on installation, inspection and testing of natural ventilation and intermittent extract systems; and Section 3 provides guidance on installation, inspection, testing and commissioning of continuous mechanical ventilation systems.
The testing and commissioning procedures set out in this guide are the approved methods by which a system must be checked and assessed before handover to the end user. For mechanical ventilation (both intermittent and continuous), air fl ow measurement tests are included as part of the commissioning process. For natural ventilation openings, the recommendation is to carry out a visual inspection and record the equivalent area.
Supplementary information appears in some places in the guide in italic font with a grey background. It is intended to assist understanding of the guidance or to direct readers to sources of additional information, but is not part of the guidance. In some cases there are links to best practice guidance that goes beyond the recommended minimum requirements.
BS EN 14134: 2004 Ventilation for buildings – Performance testing and installation checks of residential ventilation systems may be referred to for further guidance on installation, inspection, testing and commissioning procedures.
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8 | Domestic Ventilation Compliance Guide: 2010 Edition
Section 4 details the information that it is recommended should be left with the building owner on completion of the installation of the system. This information is to aid the user to correctly operate and maintain the system.
Section 5 contains in Part 1 a form for recording details of the installation; in Part 2a an installation checklist; in Part 2b a form for recording the results of a visual inspection of the installation; and in Part 3 the air fl ow measurement test and commissioning sheet to be given to the building control body.
1.4 Key terms
The following key terms where used in this guide are shown in bold italic font. For other terms, reference should be made to Approved Document F.
Background ventilator is a small ventilation opening designed to provide controllable whole building ventilation.
BCB or building control body is a local authority or an approved inspector.
Continuous mechanical extract ventilation (MEV) is a ventilation system comprising a central ducted continuously running extract fan (or a set of local continuously running extract fans in the wet rooms for de-centralised systems), air being supplied via background ventilators into the habitable rooms.
Continuous mechanical balanced ventilation with heat recovery (MVHR) is a ventilation system that comprises central ducted supply and extract fans, air being supplied into the habitable rooms via a heat recovery unit.
Equivalent area is a measure of the aerodynamic performance of a ventilator. It is the area of a sharp-edged circular orifi ce which air would pass through at the same volume fl ow rate, under an identical applied pressure difference, as the opening under consideration.
Free area is the geometric open area of a ventilator or terminal.
Intermittent extract fan is a mechanical ventilator that does not run all the time, usually only running when there is a particular need to remove pollutants or water vapour (e.g. during cooking or bathing). Intermittent operation may be under either manual control or automatic control.
Passive stack ventilation (PSV) is a ventilation system using ducts from terminals in the ceilings of rooms to terminals on the roof that extract air to outside by a combination of the natural stack effect and the pressure effects of wind passing over the roof of the building.
Single room heat recovery ventilator (SRHRV) is a ventilation system comprising local continuously running balanced supply and extract fans in a single room.
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Section 2 Natural ventilation and intermittent extract systems | 9
Section 2
Natural ventilation and intermittent extract systems
2.1 System 1 – Background ventilators and intermittent extract fans
The information provided in Tables 1 and 2 gives guidance on good installation practice and on procedures for the inspection and air fl ow measurement testing of systems comprising background ventilators and intermittent extract fans (including cooker hoods) for dwellings. The relevant design guidance is given in ADF, in particular Table 5.2a.
2.2 System 2 – Passive stack ventilation
The information provided in Tables 3 and 4 gives guidance on good installation practice and the procedures for the inspection of passive stack systems for dwellings. The relevant design guidance is given in ADF, in particular Table 5.2b.
Note:
If intermittent extract fans are installed in dwellings where the ventilation system follows System 2, air fl ow measurement testing should be carried out and recorded as for System 1.
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10 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 1
: Sys
tem
1 in
stal
lati
on
gu
idel
ines
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
1.0
Inte
rmit
ten
t ex
trac
t fan
s (in
clu
din
g
coo
ker h
oo
ds)
Man
ufa
ctu
rer’s
det
ails
an
d s
pec
ifi c
inst
ruct
ion
sa.
Th
e in
form
atio
n pr
ovid
ed in
this
Tabl
e se
ts o
ut th
e m
inim
um re
com
men
ded
proc
edur
es fo
r typ
ical
Sys
tem
1 in
stal
latio
ns.
b.
For f
urth
er p
rodu
ct-s
peci
fi c in
form
atio
n, re
fer t
o th
e m
anuf
actu
rer’s
in
stal
latio
n in
stru
ctio
ns.
Prep
arat
ion
a.
Ensu
re th
e fi n
al lo
catio
n of
equ
ipm
ent o
ffer
s suf
fi cie
nt sp
ace
to a
llow
acc
ess
for m
aint
enan
ce.
b.
For t
hrou
gh-w
all u
nits
, cor
e a
hole
of a
suita
ble
dim
ensi
on th
roug
h th
e fa
bric
of t
he b
uild
ing
for t
he in
stal
latio
n of
the
duct
. The
hol
e sh
ould
hav
e a
slig
ht d
ownw
ard
angl
e to
war
ds th
e ou
tsid
e to
pre
vent
wat
er in
gres
s.c.
Fo
r cei
ling
mou
nted
fans
/ter
min
als,
the
hole
s sho
uld
be c
ut to
the
min
imum
re
quire
d si
ze su
ch th
at th
e fa
n/gr
ille
spig
ot fi
ts sn
ugly
into
the
hole
.d.
W
here
duc
twor
k pe
netr
ates
a b
uild
ing’
s air
barr
ier,
the
cont
inui
ty o
f the
ba
rrie
r mus
t be
mai
ntai
ned.
The
nat
ure
of th
e ba
rrie
r and
eas
e of
ach
ievi
ng
an e
ffec
tive
seal
shou
ld b
e co
nsid
ered
bef
ore
hole
s are
dril
led.
e.
It is
impo
rtan
t to
cons
ider
the
plan
ning
and
inst
alla
tion
of d
uctw
ork
in c
o-or
dina
tion
with
oth
er tr
ade
activ
ities
and
inst
alla
tions
, suc
h th
at ro
utes
are
de
sign
ed w
ithou
t com
prom
ise
to th
e re
quire
d ve
ntila
tion
air fl
ow
rate
s.
Inst
alla
tio
n –
thro
ug
h w
all
a.
The
duct
slee
ve c
onne
ctin
g th
e fa
n ou
tlet t
o th
e te
rmin
al/g
rille
shou
ld b
e at
le
ast t
he sa
me
diam
eter
as t
he fa
n ou
tlet.
b.
The
duct
slee
ve sh
ould
be
rigid
. In
situ
atio
ns w
here
this
is n
ot p
ossi
ble,
fl e
xibl
e du
ctw
ork
may
be
used
, pro
vidi
ng e
xtra
ct v
entil
atio
n ra
tes a
re n
ot
com
prom
ised
. Fle
xibl
e du
ctw
ork
shou
ld b
e pu
lled
taut
.c.
Th
e in
stal
led
duct
slee
ve sh
ould
be
seal
ed to
the
exte
rnal
and
inte
rnal
wal
l to
mai
ntai
n ai
r tig
htne
ss. T
his i
s of p
artic
ular
impo
rtan
ce fo
r cav
ity w
alls
.d.
En
sure
that
ther
e ar
e no
obs
truc
tions
in th
e du
ct p
rior t
o fi t
ting
the
fan.
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Section 2 Natural ventilation and intermittent extract systems | 11
Tab
le 1
: Sys
tem
1 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
1.0
Inte
rmit
ten
t ex
trac
t fan
s (in
clu
din
g
coo
ker h
oo
ds)
(c
on
tin
ued
)
Inst
alla
tio
n –
thro
ug
h w
ind
ow
a.
Che
ck th
e su
itabi
lity
of th
e w
indo
w a
nd o
btai
n a
suita
ble
win
dow
mou
ntin
g ki
t fro
m th
e m
anuf
actu
rer f
or th
e pr
opos
ed fa
n un
it.
For w
indo
w m
ount
ed fa
ns, d
o no
t pl
an to
inst
all i
n op
enin
g lig
hts.
The
m
inim
um a
dvisa
ble
glas
s thi
ckne
ss is
4
mm
, but
seek
spec
ialis
t adv
ice
from
gl
azie
r for
mou
ntin
g su
itabi
lity.
Inst
alla
tio
n –
du
cted
a.
Rigi
d du
cts,
rect
angu
lar o
r circ
ular
, sho
uld
be u
sed
whe
reve
r pos
sible
. Whe
re
nece
ssar
y, fl
exib
le d
ucts
may
be
used
, but
thei
r len
gths
shou
ld b
e ke
pt to
a
min
imum
, con
nect
ing
to ri
gid
duct
wor
k at
the
earli
est o
ppor
tuni
ty.
b.
For fl
exi
ble
duct
con
nect
ed to
axi
al fa
ns th
e le
ngth
is li
mite
d to
1.5
met
res;
fo
r cen
trifu
gal f
ans t
he le
ngth
lim
it is
6 m
etre
s (fo
r ext
ract
rate
s 6 to
30
l/s),
and
3 m
etre
s (fo
r ext
ract
rate
s 31
to 6
0 l/s
).c.
Th
e nu
mbe
r of b
ends
is li
mite
d to
two
for u
p to
30
l/s, a
nd re
duce
s to
one
bend
for h
ighe
r ext
ract
rate
s.d.
Fl
exib
le d
uct s
houl
d be
pul
led
taug
ht to
ens
ure
that
the
full
inte
rnal
di
amet
er is
obt
aine
d an
d fl o
w re
sist
ance
min
imis
ed. T
his i
s con
side
red
to
have
bee
n ac
hiev
ed if
the
duct
is e
xten
ded
to 9
0% o
f its
max
imum
leng
th.
e.
Duc
ting
shou
ld b
e in
sula
ted
whe
re it
pas
ses t
hrou
gh u
nhea
ted
area
s and
vo
ids (
e.g.
loft
spac
es) w
ith th
e eq
uiva
lent
of a
t lea
st 2
5 m
m o
f a m
ater
ial
havi
ng a
ther
mal
con
duct
ivity
of ≤
0.04
W/(m
.K) t
o re
duce
the
poss
ibili
ty o
f co
nden
satio
n fo
rmin
g.f.
H
oriz
onta
l duc
ting,
incl
udin
g du
ctin
g in
wal
ls, s
houl
d be
arr
ange
d to
slop
e sl
ight
ly d
ownw
ards
aw
ay fr
om th
e fa
n to
pre
vent
bac
kfl o
w o
f any
moi
stur
e in
to th
e pr
oduc
t.g.
Ve
rtic
al d
uctin
g w
ill re
quire
a c
onde
nsat
e tr
ap in
ord
er to
pre
vent
ba
ckfl o
w o
f any
moi
stur
e in
to th
e pr
oduc
t. F
ollo
w th
e m
anuf
actu
rer’s
re
com
men
datio
ns in
thes
e in
stan
ces.
h.
Whe
re d
uctin
g pa
sses
thro
ugh
a fi r
e-st
oppi
ng w
all o
r fi re
com
part
men
t,
the
requ
ired
mea
sure
s to
ensu
re c
ompl
ianc
e w
ith P
art B
of t
he B
uild
ing
Regu
latio
ns sh
ould
be
take
n.
Exce
ptio
ns to
duc
t lim
its w
ill b
e ac
cept
ed p
rovi
ding
evi
denc
e fr
om
the
man
ufac
ture
r is a
vaila
ble
that
con
fi rm
s tha
t the
spec
ifi ed
pe
rfor
man
ce w
ill n
ot b
e af
fect
ed.
For i
n-lin
e fa
ns, r
efer
to
man
ufac
ture
r’s d
ata.
For d
uct i
nsta
llatio
ns, s
ee D
iagr
am 1
.W
here
pos
sible
, con
nect
stra
ight
le
ngth
s of d
uctw
ork
to fa
n sp
igot
.
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12 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 1
: Sys
tem
1 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
Co
oke
r ho
od
sa.
C
ooke
r hoo
ds sh
ould
be
inst
alle
d so
that
acc
ess i
s eas
y fo
r cha
ngin
g an
d cl
eani
ng o
f the
fi lte
r/fi l
ters
.
Re-c
ircul
atin
g co
oker
hoo
ds d
o no
t pr
ovid
e ex
trac
t ven
tilat
ion.
To p
rovi
de
extr
act v
entil
atio
n in
a k
itche
n fo
r th
e pu
rpos
es o
f Par
t F, a
n ex
trac
t fan
to
out
side
shou
ld h
ave
an in
stal
led
capa
city
of a
t lea
st 6
0 l/s
.
2.0
Ven
tila
tio
n
air i
nle
ts a
nd
d
isch
arg
e te
rmin
als/
gri
lles
Bac
kgro
un
d v
enti
lato
rsa.
Ba
ckgr
ound
ven
tilat
ors s
houl
d be
pro
vide
d to
mee
t the
min
imum
requ
ired
equi
vale
nt a
rea
of v
entil
atio
n sp
ecifi
ed b
y Ta
ble
5.2a
of A
DF.
b.
For w
all m
ount
ed b
ackg
roun
d ve
ntila
tors
mak
e an
ope
ning
in th
e w
all
in a
ccor
danc
e w
ith th
e m
anuf
actu
rer’s
inst
ruct
ions
for t
he si
ze re
quire
d.
Ensu
re th
at th
ere
are
no o
bstr
uctio
ns in
the
open
ing.
c.
Inst
all t
he w
all o
r win
dow
ven
tilat
or p
rodu
ct in
acc
orda
nce
with
the
man
ufac
ture
r’s in
stru
ctio
ns.
d.
Ensu
re th
at w
all o
r win
dow
ven
tilat
or p
rodu
cts a
re se
aled
to th
eir s
urro
unds
us
ing
a pr
oprie
tary
seal
ant a
s rec
omm
ende
d by
the
man
ufac
ture
r.
Back
grou
nd v
entil
ator
s fi t
ted
in
win
dow
s are
usu
ally
inst
alle
d du
ring
man
ufac
ture
. Clo
se c
o-or
dina
tion
betw
een
supp
lier a
nd in
stal
ler i
s re
com
men
ded
to e
nsur
e co
rrec
t lo
catio
n of
ven
tilat
ors.
Back
grou
nd v
entil
ator
s ins
talle
d in
w
alls
may
requ
ire a
pro
prie
tary
win
d co
wl t
o re
duce
win
d no
ise a
nd p
reve
nt
over
-ven
tilat
ion.
Dis
char
ge
term
inal
s/g
rille
s –
roo
f an
d w
all m
ou
nte
da.
O
nly
prop
rieta
ry te
rmin
als s
houl
d be
use
d.b.
En
sure
that
the
free
are
a of
the
term
inal
/gril
le o
peni
ng is
a m
inim
um o
f 90
per
cen
t of t
he fr
ee a
rea
of th
e du
ctin
g be
ing
used
.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 2 Natural ventilation and intermittent extract systems | 13
Tab
le 1
: Sys
tem
1 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
3.0
Mis
cella
neo
us
Air
tran
sfer
a.
To e
nsur
e go
od tr
ansf
er o
f air
thro
ugho
ut th
e dw
ellin
g, th
ere
shou
ld b
e an
un
derc
ut o
f min
imum
are
a 76
00 m
m2 i
n al
l int
erna
l doo
rs a
bove
the
fl oor
fi n
ish.
Thi
s is e
quiv
alen
t to
an u
nder
cut o
f 10
mm
for a
stan
dard
760
mm
w
idth
doo
r.b.
En
sure
that
the
air t
rans
fer p
rovi
sion
is u
nres
tric
ted
afte
r fl o
or fi
nish
es h
ave
been
laid
(e.g
. car
pets
shou
ld n
ot e
ncro
ach)
. Thi
s sho
uld
be a
chie
ved
by
mak
ing
an u
nder
cut o
f 10
mm
abo
ve th
e fl o
or fi
nish
if th
e fl o
or fi
nish
is
fi tte
d, o
r by
a 20
mm
und
ercu
t abo
ve th
e fl o
orbo
ards
, or o
ther
surf
ace,
if
the
fi nis
h ha
s not
bee
n fi t
ted.
4.0
Co
ntr
ols
Gen
eral
a.
Refe
r to
Tabl
e 5.
2a o
f AD
F.b.
En
sure
that
a lo
cal m
anua
l ove
rrid
e co
ntro
l is p
rovi
ded
for a
ny e
xtra
ct fa
n op
erat
ed b
y au
tom
atic
con
trol
s.
Hum
idity
con
trol
s sho
uld
not b
e us
ed
for s
anita
ry a
ccom
mod
atio
n w
here
od
our i
s the
mai
n po
lluta
nt.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
14 | Domestic Ventilation Compliance Guide: 2010 Edition
Diagram 1: Duct installations
Airflow
Airflow
Room terminal/extract grille
CavitySealant
Discharge grille
Grilledischargeopening
Maximum length offlexible ducting
Flexibleducting supports
-
-
Minimum radius =the diameter of
flexible ducting used
Sleeve
✗
✓Do
Don’t
Preferred flexibleducting route
Restrictions
Peaks and troughs
b
a
The inner radius of any bend should be greater or equal to the diameter of the ducting being used. If the radius is reduced, the resistance of the bend will increase and the volume of air being extracted will decrease (see “Do” diagram above).
Ensure fl exible ducting is installed without peaks or troughs (see “Don’t” diagram above).
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 2 Natural ventilation and intermittent extract systems | 15
Tab
le 2
: Sys
tem
1 in
spec
tio
n a
nd
test
ing
Rec
om
men
dat
ion
s an
d m
inim
um
req
uir
emen
tsSu
pp
lem
enta
ry in
form
atio
n
1.0
Inte
rmit
ten
t ex
trac
t fan
s (in
clu
din
g
coo
ker h
oo
ds)
Vis
ual
insp
ecti
on
sC
arry
out
the
follo
win
g ch
ecks
and
reco
rd th
e re
sults
in S
ectio
n 5:
a.
Doe
s the
syst
em in
stal
latio
n co
mpl
y w
ith th
e in
stal
latio
n cl
ause
s in
Tabl
e 1?
b.
Doe
s the
num
ber o
f ext
ract
poi
nts a
nd te
rmin
als s
atis
fy Ta
ble
5.2a
in A
DF?
c.
Is a
ll eq
uipm
ent i
n go
od c
ondi
tion
with
no
obvi
ous d
efec
ts th
at w
ill b
e ha
zard
ous o
r aff
ect t
he sy
stem
per
form
ance
?
Fun
ctio
nal
ch
ecks
a.
Tem
pora
ry p
rote
ctio
n an
d pa
ckag
ing
shou
ld b
e re
mov
ed fr
om a
ll pr
oduc
ts.
b.
Che
ck fa
n op
erat
es c
orre
ctly
whe
n ac
tivat
ed b
y m
anua
l con
trol
(e.g
. lig
ht
switc
h), o
r aut
omat
ic c
ontr
ol (e
.g. P
IR).
c.
Ensu
re fa
n sw
itche
s off
aft
er c
ontr
ols a
re d
e-ac
tivat
ed a
nd, i
n th
e ca
se o
f ru
n-on
tim
ers,
that
thes
e ar
e se
t to
a m
inim
um o
f 15
min
utes
.
Unl
ess t
he ti
mer
con
trol
is g
radu
ated
in
min
utes
, run
-on
timer
s sho
uld
be
chec
ked
agai
nst a
tim
ed te
st a
nd
adju
sted
if ru
n tim
e is
less
than
15
min
utes
.
Air
fl o
w m
easu
rem
ent t
esti
ng
a.
Ensu
re th
at a
ll in
tend
ed b
ackg
roun
d ve
ntila
tors
or o
ther
air
tran
sfer
dev
ices
ar
e op
en.
b.
Ensu
re a
ll in
tern
al a
nd e
xter
nal d
oors
and
win
dow
s are
clo
sed,
incl
udin
g ro
oms i
n w
hich
mea
sure
men
ts a
re b
eing
car
ried
out.
c.
Air
fl ow
mea
sure
men
ts sh
ould
be
perf
orm
ed u
sing
a c
alib
rate
d ai
r fl o
w
devi
ce w
ith p
ropr
ieta
ry h
ood
atta
chm
ent a
nd re
sults
reco
rded
in li
tres
per
se
cond
(l/s
). Re
fere
nce
shou
ld b
e m
ade
to Ta
ble
5.1a
of A
DF
for d
esig
n ai
r fl o
w ra
tes.
d.
Reco
rd th
e ex
trac
t air
fl ow
for e
ach
extr
act f
an o
nto
the
com
mis
sion
ing
shee
t (se
e Se
ctio
n 5)
.e.
Th
e in
stru
men
t sho
uld
be c
alib
rate
d an
nual
ly a
nd b
e ca
pabl
e of
ach
ievi
ng
an a
ccur
acy
of ±
5 p
er c
ent.
No
te: T
his
is th
e ap
pro
ved
p
roce
du
re fo
r mea
suri
ng
the
air
fl o
w o
f in
term
itte
nt e
xtra
ct fa
ns
and
co
oke
r ho
od
s as
req
uir
ed b
y th
e B
uild
ing
Reg
ula
tio
ns.
The
mos
t com
mon
met
hod
is th
e us
e of
a v
ane
anem
omet
er, o
r sim
ilar,
plac
ed in
a h
ood
whi
ch c
over
s the
te
rmin
al to
mea
sure
the
extr
act a
ir fl o
w ra
te.
Cal
ibra
tion
of m
easu
rem
ent
equi
pmen
t sho
uld
be u
nder
take
n an
nual
ly b
y re
turn
ing
the
inst
rum
ent
to a
UK
AS
accr
edite
d ca
libra
tion
cent
re.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
16 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 2
: Sys
tem
1 in
spec
tio
n a
nd
test
ing
(co
nti
nu
ed)
2.0
Bac
kgro
un
d
ven
tila
tors
Vis
ual
insp
ecti
on
sC
arry
out
the
follo
win
g ch
ecks
and
reco
rd th
e re
sults
in S
ectio
n 5:
a.
Doe
s the
equ
ival
ent a
rea
and
loca
tion
of a
ir in
lets
satis
fy Ta
ble
5.2a
in A
DF?
b.
Has
tem
pora
ry p
rote
ctio
n an
d pa
ckag
ing
been
rem
oved
from
all
back
grou
nd v
entil
ator
s, a
nd d
o th
e sh
utte
rs o
pen
and
clos
e co
rrec
tly?
c.
Is th
ere
an a
dequ
ate
seal
bet
wee
n th
e ve
ntila
tor p
rodu
ct a
nd th
e w
all/
win
dow
fram
e?
The
equi
vale
nt a
rea
shou
ld b
e di
spla
yed
on th
e ai
r inl
et p
rodu
ct.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 2 Natural ventilation and intermittent extract systems | 17
Tab
le 3
: Sys
tem
2 in
stal
lati
on
gu
idel
ines
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
1.0
Du
ctw
ork
p
rep
arat
ion
an
d
inst
alla
tio
n
Man
ufa
ctu
rer’s
det
ails
an
d s
pec
ifi c
inst
ruct
ion
sa.
Th
e in
form
atio
n pr
ovid
ed in
this
Tabl
e se
ts o
ut th
e m
inim
um re
com
men
ded
proc
edur
es fo
r typ
ical
Sys
tem
2 in
stal
latio
ns.
b.
For f
urth
er p
rodu
ct-s
peci
fi c in
form
atio
n, re
fer t
o th
e m
anuf
actu
rer’s
in
stal
latio
n in
stru
ctio
ns.
c.
Inte
rnal
duc
t dia
met
ers a
nd/o
r cro
ss se
ctio
nal a
reas
shou
ld b
e no
less
than
th
e si
zes g
iven
in A
DF,
Tabl
e 5.
2b.
Prep
arat
ion
a.
Duc
ting
rout
es a
nd o
ffse
ts sh
ould
be
plan
ned
such
that
thei
r fi n
al
inst
alla
tion
is in
acc
orda
nce
with
the
illus
trat
ed g
uida
nce
give
n in
Dia
gram
s 2
and
3.b.
Se
para
te d
ucts
shou
ld b
e ta
ken
from
the
ceili
ngs o
f the
kitc
hen,
bat
hroo
m,
utili
ty ro
om o
r WC
to se
para
te te
rmin
als o
n th
e ro
of. D
o no
t use
com
mon
ou
tlet t
erm
inal
s or b
ranc
hed
duct
s.c.
W
here
duc
twor
k pe
netr
ates
a b
uild
ing’
s air
barr
ier,
the
cont
inui
ty o
f the
ba
rrie
r mus
t be
mai
ntai
ned.
The
nat
ure
of th
e ba
rrie
r and
eas
e of
ach
ievi
ng
an e
ffec
tive
seal
shou
ld b
e co
nsid
ered
bef
ore
hole
s are
dril
led.
d.
It is
impo
rtan
t to
cons
ider
the
plan
ning
and
inst
alla
tion
of d
uctw
ork
in c
o-or
dina
tion
with
oth
er tr
ade
activ
ities
and
inst
alla
tions
, suc
h th
at ro
utes
are
de
sign
ed w
ithou
t com
prom
ise
to th
e re
quire
d ve
ntila
tion
air fl
ow
rate
s.
Idea
lly, a
ll du
cts s
houl
d be
inst
alle
d as
ne
ar v
ertic
al a
s site
con
stra
ints
allo
w.
Both
rigi
d du
ctin
g an
d fl e
xibl
e du
ctin
g ar
e su
itabl
e fo
r PSV
syst
ems a
nd h
ave
simila
r res
istan
ce to
air
fl ow
at t
ypic
al
PSV
syst
em a
ir fl o
w ra
tes.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
18 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 3
: Sys
tem
2 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
1.0
Du
ctw
ork
p
rep
arat
ion
an
d
inst
alla
tio
n
(co
nti
nu
ed)
Inst
alla
tio
na.
C
aref
ully
mea
sure
the
leng
th o
f duc
t to
be u
sed
such
that
it is
just
suffi
cien
t to
fi t b
etw
een
the
ceili
ng te
rmin
al a
nd th
e ou
tlet t
erm
inal
. Fle
xibl
e du
ctin
g sh
ould
be
fully
ext
ende
d bu
t not
taut
, allo
win
g ap
prox
imat
ely
300
mm
ext
ra
to m
ake
smoo
th b
ends
in a
n of
fset
syst
em.
b.
Duc
ting
shou
ld b
e pr
oper
ly su
ppor
ted
alon
g its
leng
th to
ens
ure
that
the
duct
can
run
stra
ight
with
out d
isto
rtio
n or
sagg
ing
and
that
ther
e ar
e no
kin
ks a
t any
ben
ds o
r the
con
nect
ions
to c
eilin
g te
rmin
als a
nd o
utle
t te
rmin
als.
Fle
xibl
e du
ctin
g ge
nera
lly re
quire
s mor
e su
ppor
t tha
n rig
id
duct
ing.
c.
In th
e ro
of sp
ace
the
duct
shou
ld b
e se
cure
d to
a w
oode
n st
rut t
hat i
s se
cure
ly fi
xed
at b
oth
ends
. A fl
exib
le d
uct s
houl
d be
allo
wed
to c
urve
gen
tly
at e
ach
end
of th
e st
rut t
o at
tach
to th
e ce
iling
term
inal
and
roof
out
let
term
inal
.d.
A
rigi
d du
ct sh
ould
be
used
for s
yste
m st
abili
ty fo
r the
par
t of a
PSV
syst
em
whi
ch is
out
side
, abo
ve th
e ro
of sl
ope.
It sh
ould
pro
ject
dow
n in
to th
e ro
of
spac
e fa
r eno
ugh
to a
llow
fi rm
supp
ort.
e.
Ensu
re th
at th
e du
ct is
secu
rely
fi xe
d to
the
roof
out
let t
erm
inal
so th
at it
ca
nnot
sag
or b
ecom
e de
tach
ed.
f.
Duc
ting
shou
ld b
e in
sula
ted
whe
re it
pas
ses t
hrou
gh u
nhea
ted
area
s and
vo
ids (
e.g.
loft
spac
es) w
ith th
e eq
uiva
lent
of a
t lea
st 2
5 m
m o
f a m
ater
ial
havi
ng a
ther
mal
con
duct
ivity
of ≤
0.04
W/(m
.K) t
o re
duce
the
poss
ibili
ty o
f co
nden
satio
n fo
rmin
g.g.
W
here
a d
uct e
xten
ds e
xter
nally
abo
ve ro
of le
vel t
he se
ctio
n ab
ove
the
roof
sh
ould
be
insu
late
d or
a c
onde
nsat
e tr
ap sh
ould
be
fi tte
d ju
st b
elow
roof
le
vel.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 2 Natural ventilation and intermittent extract systems | 19
Tab
le 3
: Sys
tem
2 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
2.0
Ven
tila
tio
n
air i
nle
ts a
nd
d
isch
arg
e te
rmin
als
Bac
kgro
un
d v
enti
lato
rsa.
Ba
ckgr
ound
ven
tilat
ors s
houl
d be
pro
vide
d to
mee
t the
min
imum
requ
ired
equi
vale
nt a
rea
of v
entil
atio
n sp
ecifi
ed b
y Ta
ble
5.2b
of A
DF.
b.
For w
all m
ount
ed b
ackg
roun
d ve
ntila
tors
mak
e an
ope
ning
in th
e w
all
in a
ccor
danc
e w
ith th
e m
anuf
actu
rer’s
inst
ruct
ions
for t
he si
ze re
quire
d.
Ensu
re th
at th
ere
are
no o
bstr
uctio
ns in
the
open
ing.
c.
Inst
all t
he w
all o
r win
dow
ven
tilat
or p
rodu
ct in
acc
orda
nce
with
the
man
ufac
ture
r’s in
stru
ctio
ns.
d.
Ensu
re th
at w
all o
r win
dow
ven
tilat
or p
rodu
cts a
re se
aled
to th
eir s
urro
unds
us
ing
a pr
oprie
tary
seal
ant a
s rec
omm
ende
d by
the
man
ufac
ture
r.
Back
grou
nd v
entil
ator
s fi t
ted
in
win
dow
s are
usu
ally
inst
alle
d du
ring
man
ufac
ture
. Clo
se c
o-or
dina
tion
betw
een
supp
lier a
nd in
stal
ler i
s re
com
men
ded
to e
nsur
e co
rrec
t lo
catio
n of
ven
tilat
ors.
Back
grou
nd v
entil
ator
s ins
talle
d in
w
alls
may
requ
ire a
pro
prie
tary
win
d co
wl t
o re
duce
win
d no
ise a
nd p
reve
nt
over
ven
tilat
ion.
Extr
act t
erm
inal
s –
wal
l an
d c
eilin
g m
ou
nte
da.
PS
V e
xtra
ct te
rmin
als s
houl
d be
loca
ted
in th
e ce
iling
or o
n a
wal
l les
s tha
n 40
0 m
m b
elow
the
ceili
ng.
b.
The
extr
act t
erm
inal
shou
ld h
ave
a fr
ee a
rea
of n
ot le
ss th
an th
e du
ct c
ross
-se
ctio
nal a
rea.
If a
con
vers
ion
fi ttin
g is
requ
ired
to c
onne
ct th
e du
ct to
th
e te
rmin
al th
en th
e du
ct c
ross
-sec
tiona
l are
a sh
ould
be
mai
ntai
ned
(or
exce
eded
) thr
ough
out t
he c
onve
rsio
n fi t
ting
so a
s not
to re
stric
t the
fl ow
.
In n
on-s
anita
ry a
ccom
mod
atio
n,
hum
idity
con
trol
led
term
inal
s may
be
used
to in
crea
se th
e ai
r fl o
w d
urin
g pe
riods
of i
ncre
ased
hum
idity
, and
to
redu
ce th
e ai
r fl o
w d
urin
g pe
riods
of
low
hum
idity
. Hum
idity
con
trol
s sh
ould
not
be
used
for s
anita
ry
acco
mm
odat
ion
whe
re o
dour
is th
e m
ain
pollu
tant
.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
20 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 3
: Sys
tem
2 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
2.0
Ven
tila
tio
n
air i
nle
ts a
nd
d
isch
arg
e te
rmin
als
(co
nti
nu
ed)
Dis
char
ge
term
inal
sa.
Pr
oprie
tary
pro
duct
s sho
uld
be u
sed
that
are
com
patib
le w
ith th
e PS
V d
uct
syst
em th
at h
as b
een
inst
alle
d.b.
Th
e ro
of te
rmin
al sh
ould
not
allo
w in
gres
s of l
arge
inse
cts o
r bird
s and
sh
ould
be
desi
gned
so th
at ra
in is
not
like
ly to
ent
er th
e du
ct a
nd ru
n do
wn
into
the
dwel
ling.
c.
The
term
inal
shou
ld a
lso
be d
esig
ned
such
that
any
con
dens
atio
n fo
rmin
g in
side
it c
anno
t run
dow
n in
to th
e dw
ellin
g bu
t will
run
off e
xter
nally
ont
o th
e ro
of.
d.
A ti
le v
entil
ator
use
d to
term
inat
e a
PSV
syst
em o
n th
e ro
of sl
ope
shou
ld b
e po
sitio
ned
no m
ore
than
0.5
m fr
om th
e ro
of ri
dge.
If th
e du
ct p
enet
rate
s th
e ro
of m
ore
than
0.5
m fr
om th
e rid
ge, i
t sho
uld
exte
nd a
bove
the
roof
sl
ope
to a
t lea
st ri
dge
heig
ht.
Refe
r to
Dia
gram
2 fo
r fur
ther
det
ails.
3.0
Mis
cella
neo
us
Air
tran
sfer
a.
To e
nsur
e go
od tr
ansf
er o
f air
thro
ugho
ut th
e dw
ellin
g, th
ere
shou
ld b
e an
un
derc
ut o
f min
imum
are
a 76
00 m
m2 i
n al
l int
erna
l doo
rs a
bove
the
fl oor
fi n
ish.
Thi
s is e
quiv
alen
t to
an u
nder
cut o
f 10
mm
for a
stan
dard
760
mm
w
idth
doo
r.b.
En
sure
that
the
air t
rans
fer p
rovi
sion
is u
nres
tric
ted
afte
r fl o
or fi
nish
es h
ave
been
laid
(e.g
. car
pets
shou
ld n
ot e
ncro
ach)
. Thi
s sho
uld
be a
chie
ved
by
mak
ing
an u
nder
cut o
f 10
mm
abo
ve th
e fl o
or fi
nish
if th
e fl o
or fi
nish
is
fi tte
d, o
r by
a 20
mm
und
ercu
t abo
ve th
e fl o
orbo
ards
, or o
ther
surf
ace,
if
the
fi nis
h ha
s not
bee
n fi t
ted.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 2 Natural ventilation and intermittent extract systems | 21
Tab
le 4
: Sys
tem
2 in
spec
tio
n
Rec
om
men
ded
min
imu
m re
qu
irem
ents
Sup
ple
men
tary
info
rmat
ion
1.0
Du
ctw
ork
an
d
term
inal
s
Vis
ual
insp
ecti
on
sC
arry
out
the
follo
win
g ch
ecks
and
reco
rd th
e re
sults
in S
ectio
n 5:
a.
Doe
s the
syst
em in
stal
latio
n co
mpl
y w
ith th
e in
stal
latio
n cl
ause
s in
Tabl
e 3?
b.
Doe
s the
num
ber a
nd si
ze o
f ter
min
al p
oint
s sat
isfy
Tabl
e 5.
2b in
AD
F?c.
Is
all
duct
wor
k an
d ar
e al
l ter
min
als i
n go
od c
ondi
tion
with
no
obvi
ous
defe
cts t
hat w
ill b
e ha
zard
ous o
r aff
ect s
yste
m p
erfo
rman
ce?
2.0
Bac
kgro
un
d
ven
tila
tors
Vis
ual
insp
ecti
on
sC
arry
out
the
follo
win
g ch
ecks
and
reco
rd th
e re
sults
in S
ectio
n 5:
a.
Doe
s the
size
, num
ber,
orie
ntat
ion
and
loca
tion
of a
ir in
lets
satis
fy Ta
ble
5.2b
in
AD
F?b.
H
as a
ny te
mpo
rary
pro
tect
ion
and
pack
agin
g be
en re
mov
ed fr
om a
ll ba
ckgr
ound
ven
tilat
ors,
and
do
shut
ters
ope
n an
d cl
ose
corr
ectly
?c.
Is
ther
e an
ade
quat
e se
al b
etw
een
the
vent
ilato
r pro
duct
and
the
wal
l/w
indo
w fr
ame?
The
equi
vale
nt a
rea
shou
ld b
e di
spla
yed
on th
e ba
ckgr
ound
ve
ntila
tor p
rodu
ct.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
22 | Domestic Ventilation Compliance Guide: 2010 Edition
Diagram 2: Suitable layouts for PSV systems
The layouts shown in Diagram 2 are considered to be suitable for the majority of dwellings of up to four storeys. Placing the outlet terminal at the ridge of the roof (Diagram 2(a)) is the preferred option for reducing the adverse effects of wind gusts and certain wind directions. A tile ventilator may be used to terminate a PSV system on the roof slope but the terminal should be positioned no more than 0.5 m from the roof ridge. If the duct penetrates the roof more than 0.5 m from the ridge, it should extend above the roof slope to at least ridge height to ensure that the duct terminal is in the negative pressure region above the roof (Diagram 2(b)).
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 2 Natural ventilation and intermittent extract systems | 23
Diagram 3: Suitable and unsuitable bends for passive stack ducts
Ducts should use no more than one offset (i.e. no more than two bends) and these should be of the “swept” rather than “sharp” type to minimise fl ow resistance. Offsets at an angle should be no more than 45° to the vertical (Diagram 3).
O N L I N E V E R S I O N
O N L I N E V E R S I O N
24 | Domestic Ventilation Compliance Guide: 2010 Edition
Section 3
Continuous mechanical ventilation systems
3.1 System 3 – Continuous mechanical extract: centralised and de-centralised
The information provided in Tables 5 and 6 gives guidance on good installation practice and the procedures for the inspection, air fl ow measurement testing and commissioning of continuous mechanical extract ventilation (MEV) systems for dwellings. The relevant design guidance is given in ADF, in particular, Table 5.2c.
3.2 System 4 – Continuous mechanical balanced systems with heat recovery: centralised and single room
The information provided in Tables 7 and 8 gives guidance on good installation practice and the procedures for the inspection, air fl ow measurement testing and commissioning of continuous mechanical balanced ventilation with heat recovery (MVHR) systems for dwellings. The relevant design guidance is given in ADF, in particular, Table 5.2d. The installation and inspection guidance is also suitable for single room heat recovery ventilators (SRHRV).
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 3 Continuous mechanical ventilation systems | 25
Tab
le 5
: Sys
tem
3 in
stal
lati
on
gu
idel
ines
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
1.0
Co
nti
nu
ou
s ex
trac
t fan
s:
cen
tral
ised
Co
nti
nu
ou
s ex
trac
t fan
s:
dec
entr
alis
ed
Man
ufa
ctu
rer’s
det
ails
an
d s
pec
ifi c
inst
ruct
ion
sa.
Th
e in
form
atio
n pr
ovid
ed in
this
Tabl
e se
ts o
ut th
e m
inim
um re
com
men
ded
proc
edur
es fo
r typ
ical
Sys
tem
3 in
stal
latio
ns.
b.
For f
urth
er p
rodu
ct-s
peci
fi c in
form
atio
n, re
fer t
o th
e m
anuf
actu
rer’s
in
stal
latio
n in
stru
ctio
ns.
c.
The
suita
bilit
y of
con
nect
ion
of a
con
tinuo
us fa
n sy
stem
to a
coo
ker h
ood
mus
t fol
low
the
man
ufac
ture
r’s g
uida
nce.
Loca
tio
n o
f fan
un
ita.
Th
e fa
n un
it sh
ould
be
loca
ted
in a
ccor
danc
e w
ith th
e m
anuf
actu
rer’s
sp
ecifi
catio
ns.
b.
Ensu
re th
e fi n
al lo
catio
n of
equ
ipm
ent o
ffer
s suf
fi cie
nt sp
ace
to a
llow
acc
ess
for m
aint
enan
ce.
c.
The
fan
unit
shou
ld b
e in
stal
led
to a
llow
suffi
cien
t spa
ce fo
r end
of l
ife
repl
acem
ent o
f the
who
le u
nit o
r key
mec
hani
cal/e
lect
rical
com
pone
nts.
Th
is sh
ould
be
achi
evab
le w
ithou
t the
nee
d to
rem
ove
fi xed
stru
ctur
es o
r si
gnifi
cant
leng
ths o
f con
nect
ed d
uctw
ork.
d.
The
fan
unit
shou
ld b
e in
stal
led
on a
soun
d st
ruct
ure,
whi
ch is
stab
le a
nd
leve
l.
The
loca
tion
of th
e fa
n un
it sh
ould
be
cho
sen
to m
inim
ise o
vera
ll du
ct
run
leng
th, b
oth
from
the
inte
rnal
ex
trac
t ter
min
als/
grill
es to
the
fan
unit
and
from
the
fan
unit
to th
e ex
tern
al
disc
harg
e te
rmin
al.
Unc
ondi
tione
d sp
aces
, e.g
. lof
ts,
may
bec
ome
very
hot
in su
mm
er,
whi
ch m
ay h
ave
impl
icat
ions
for b
oth
mec
hani
cal a
nd e
lect
roni
c co
mpo
nent
lif
e.Re
fer t
o th
e m
anuf
actu
rer’s
sp
ecifi
catio
n fo
r app
ropr
iate
en
viro
nmen
tal c
ondi
tions
. Th
e fa
n un
it sp
igot
arr
ange
men
t m
ay d
icta
te th
e lo
catio
n an
d or
ient
atio
n of
inst
alla
tion:
to e
nsur
e op
timum
per
form
ance
refe
r to
the
man
ufac
ture
r’s in
stru
ctio
ns.
If a
fan
unit
is in
stal
led
in a
n un
heat
ed
spac
e, it
may
nee
d to
be
insu
late
d to
min
imise
the
risk
of c
onde
nsat
ion
form
ing
with
in th
e fa
n un
it ca
sing.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
26 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 5
: Sys
tem
3 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
1.0
Co
nti
nu
ou
s ex
trac
t fan
s:
cen
tral
ised
Co
nti
nu
ou
s ex
trac
t fan
s:
dec
entr
alis
ed
(co
nti
nu
ed)
Prep
arat
ion
for i
nst
alla
tio
na.
A
hol
e of
a su
itabl
e di
men
sion
thro
ugh
the
fabr
ic o
f the
bui
ldin
g w
ill
be re
quire
d fo
r the
inst
alla
tion
of th
e du
ct. T
he h
ole
will
nee
d a
slig
ht
dow
nwar
d an
gle
tow
ards
the
outs
ide
to p
reve
nt w
ater
ingr
ess.
b.
Whe
re d
uctw
ork
pene
trat
es a
bui
ldin
g’s a
ir ba
rrie
r, th
e co
ntin
uity
of t
he
barr
ier m
ust b
e m
aint
aine
d. T
he n
atur
e of
the
barr
ier a
nd e
ase
of a
chie
ving
an
eff
ectiv
e se
al sh
ould
be
cons
ider
ed b
efor
e ho
les a
re d
rille
d.c.
Fo
r cei
ling
mou
nted
fans
or t
erm
inal
s/gr
illes
, the
hol
es sh
ould
be
cut t
o th
e m
inim
um re
quire
d siz
e su
ch th
at th
e fa
n/gr
ille
spig
ot fi
ts sn
ugly
into
the
hole
.d.
It
is im
port
ant t
o co
nsid
er th
e pl
anni
ng a
nd in
stal
latio
n of
duc
twor
k in
co-
ordi
natio
n w
ith o
ther
trad
e ac
tiviti
es a
nd in
stal
latio
ns, s
uch
that
rout
es a
re
desi
gned
with
out c
ompr
omis
e to
the
requ
ired
vent
ilatio
n ai
r fl o
w ra
tes.
Inst
alla
tio
na.
Th
e fa
n un
it sh
ould
be
inst
alle
d us
ing
the
man
ufac
ture
r’s su
pplie
d or
re
com
men
ded
fi xin
g br
acke
ts.
Aco
ustic
/ant
i-vib
ratio
n iso
latio
n m
ay b
e re
quire
d. T
his w
ill d
epen
d on
the
natu
re o
f the
mou
ntin
g st
ruct
ure:
refe
r to
the
man
ufac
ture
r’s
inst
ruct
ions
.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 3 Continuous mechanical ventilation systems | 27
Tab
le 5
: Sys
tem
3 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
2.0
Du
ctw
ork
Du
ct in
stal
lati
on
– g
ener
al n
ote
sa.
D
ucts
shou
ld b
e si
zed
to m
inim
ise
pres
sure
loss
and
noi
se g
ener
atio
n. T
his i
s ac
hiev
ed b
y si
zing
of t
he d
ucts
to li
mit
the
air v
eloc
ity.
b.
The
rout
ing
of d
ucts
shou
ld m
inim
ise
over
all d
uct l
engt
h an
d m
inim
ise
the
num
ber o
f ben
ds re
quire
d. It
is p
artic
ular
ly im
port
ant t
o m
inim
ise
bend
s in
mai
n du
cts o
pera
ting
at h
ighe
r air
velo
citie
s.c.
Th
e ne
ed fo
r priv
acy
(aco
ustic
sepa
ratio
n) b
etw
een
room
s sho
uld
be
cons
ider
ed w
hen
plan
ning
duc
t lay
out.
d.
Whe
re ro
om a
ir ex
trac
t ter
min
als/
grill
es a
re n
ot fi
tted
with
fi lte
rs, s
uffi c
ient
sp
ace
to a
llow
acc
ess f
or c
lean
ing
duct
s sho
uld
be p
rovi
ded.
e.
Duc
ting
shou
ld b
e in
sula
ted
whe
re it
pas
ses t
hrou
gh u
nhea
ted
area
s and
vo
ids (
e.g.
loft
spac
es) w
ith th
e eq
uiva
lent
of a
t lea
st 2
5 m
m o
f a m
ater
ial
havi
ng a
ther
mal
con
duct
ivity
of ≤
0.04
W/(m
.K) t
o re
duce
the
poss
ibili
ty o
f co
nden
satio
n fo
rmin
g. W
here
a d
uct e
xten
ds a
bove
roof
leve
l the
sect
ion
abov
e th
e ro
of sh
ould
be
insu
late
d or
a c
onde
nsat
e tr
ap sh
ould
be
fi tte
d ju
st
belo
w ro
of le
vel.
f.
Hor
izon
tal d
uctin
g, in
clud
ing
duct
ing
in w
alls
, sho
uld
be a
rran
ged
to sl
ope
slig
htly
dow
nwar
ds a
way
from
the
fan
to p
reve
nt b
ackfl
ow
of a
ny m
oist
ure
into
the
prod
uct.
g.
Vert
ical
duc
ting
will
requ
ire a
con
dens
ate
trap
in o
rder
to p
reve
nt b
ackfl
ow
of
any
moi
stur
e in
to th
e pr
oduc
t.h.
Pe
rfor
ated
insu
late
d fl e
xi d
uct,
use
d to
min
imis
e ai
rbor
ne a
cous
tic
tran
smis
sion
, sho
uld
not b
e us
ed b
etw
een
the
fan
unit
and
exte
rnal
di
scha
rge
term
inal
to p
reve
nt c
onde
nsat
ion
occu
rrin
g w
ithin
the
insu
latio
n m
ater
ial.
i. W
here
duc
ts p
ass t
hrou
gh fi
re b
arrie
rs, t
hey
mus
t be
appr
opria
tely
fi re
st
oppe
d in
acc
orda
nce
with
the
requ
irem
ents
of P
art B
of t
he B
uild
ing
Regu
latio
ns (F
ire S
afet
y).
The
duct
size
and
type
spec
ifi ed
by
the
syst
em d
esig
ner s
houl
d al
way
s be
used
, to
min
imise
pre
ssur
e lo
ss a
nd
noise
gen
erat
ion.
Mai
n du
cts s
houl
d be
run
at th
e sa
me
size
as th
e fa
n un
it sp
igot
. Duc
t siz
e sh
ould
then
be
redu
ced
for b
ranc
h du
cts.
A ra
dial
layo
ut m
ay a
chie
ve a
cous
tic
sepa
ratio
n m
ore
effe
ctiv
ely
than
a
bran
ched
layo
ut.
The
perf
orm
ance
of t
he v
entil
atio
n sy
stem
relie
s on
effi c
ient
air
dist
ribut
ion
and
it is
vita
l tha
t duc
t in
stal
latio
n is
not l
eft u
ntil
the
last
m
omen
t whe
n th
e on
ly m
eans
of
over
com
ing
obst
ruct
ions
is to
inst
all
fl exi
ble
duct
s whe
re ri
gid
duct
s had
be
en sp
ecifi
ed.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
28 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 5
: Sys
tem
3 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
2.0
Du
ctw
ork
(c
on
tin
ued
)
Inst
alla
tio
n o
f du
cts
– ri
gid
a.
Duc
ts sh
ould
not
be
inst
alle
d w
here
they
can
be
easi
ly d
amag
ed, f
or
exam
ple
acro
ss o
pen
loft
are
as w
here
they
may
be
stoo
d on
or h
ave
item
s pl
aced
on
them
, bre
akin
g se
als a
nd p
ossi
bly
crus
hing
the
duct
.b.
C
onne
ctio
n of
com
pone
nts s
houl
d no
t res
ult i
n si
gnifi
cant
air
fl ow
re
sist
ance
. Com
pone
nts s
houl
d be
pro
prie
tary
and
fi t e
asily
toge
ther
w
ithou
t dis
tort
ion.
c.
Rigi
d du
ct ru
ns m
ust b
e ad
equa
tely
supp
orte
d.
Dist
ortio
n of
rect
angu
lar d
uct m
ay
resu
lt in
sign
ifi ca
nt re
duct
ion
of
the
free
inte
rnal
are
a of
the
duct
, in
crea
sing
the
fl ow
resis
tanc
e an
d m
akin
g se
alin
g m
ore
diffi
cul
t.
Inst
alla
tio
n o
f du
cts
– fl
exib
lea.
D
ucts
shou
ld n
ot b
e in
stal
led
whe
re th
ey c
an b
e ea
sily
dam
aged
, for
ex
ampl
e ac
ross
ope
n lo
ft a
reas
whe
re th
ey m
ay b
e st
ood
on o
r hav
e ite
ms
plac
ed o
n th
em, c
rush
ing
the
duct
and
rest
rictin
g or
pre
vent
ing
all a
ir fl o
w
thro
ugh
the
duct
.b.
Fl
exib
le d
uct s
houl
d be
pul
led
taug
ht to
ens
ure
that
the
full
inte
rnal
di
amet
er is
obt
aine
d an
d fl o
w re
sist
ance
min
imis
ed. T
his i
s con
side
red
to
have
bee
n ac
hiev
ed if
the
duct
is e
xten
ded
to 9
0% o
f its
max
imum
leng
th.
c.
Flex
ible
duc
twor
k sh
ould
be
supp
orte
d at
suita
ble
inte
rval
s to
min
imis
e sa
ggin
g.d.
Be
nds i
n fl e
xibl
e du
ct sh
ould
hav
e a
min
imum
insi
de ra
dius
equ
al to
the
diam
eter
of t
he d
uct –
see
Dia
gram
1. I
f tig
hter
ben
ds a
re re
quire
d, ri
gid
bend
s sho
uld
be u
sed.
It is
sugg
este
d th
at fl
exib
le d
ucts
sh
ould
be
supp
orte
d at
inte
rval
s not
ex
ceed
ing
600
mm
.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 3 Continuous mechanical ventilation systems | 29
Tab
le 5
: Sys
tem
3 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
2.0
Du
ctw
ork
(c
on
tin
ued
)
Du
ct c
on
nec
tio
ns
a.
All
duct
con
nect
ions
requ
ire se
alin
g. W
here
duc
ts a
re in
stal
led
agai
nst a
so
lid st
ruct
ure
this
can
be
diffi
cult
to a
chie
ve. I
n su
ch lo
catio
ns p
reas
sem
bly
of d
uct s
ectio
ns sh
ould
be
cons
ider
ed. T
his w
ill re
quire
that
con
nect
ions
are
pe
rman
ent t
o en
sure
the
seal
is m
aint
aine
d du
ring
inst
alla
tion.
b.
Whe
re a
cces
s to
duct
s will
not
be
poss
ible
aft
er c
onst
ruct
ion
is c
ompl
ete,
i.e
. duc
twor
k is
with
in fl
oor a
nd w
all v
oids
, con
side
ratio
n sh
ould
be
give
n to
per
man
ent c
onne
ctio
n an
d se
alin
g w
ith a
n ap
prop
riate
non
-har
deni
ng
seal
ant,
and
not
usi
ng d
uct t
ape
to a
chie
ve c
onne
ctio
n an
d se
alin
g.c.
C
onne
ctio
n of
leng
ths o
f fl e
xibl
e du
ct m
ust u
se a
rigi
d co
nnec
tor a
nd ju
bile
e cl
ips o
r sim
ilar t
o en
sure
a lo
ng te
rm se
al is
ach
ieve
d. C
onne
ctio
ns o
f len
gths
of
fl ex
ible
duc
t sho
uld
not b
e ta
ped-
only.
3.0
Ven
tila
tio
n
air i
nle
ts a
nd
in
tern
al a
ir
tran
sfer
Bac
kgro
un
d v
enti
lato
rsa.
Ba
ckgr
ound
ven
tilat
ors s
houl
d be
pro
vide
d to
mee
t the
min
imum
requ
ired
equi
vale
nt a
rea
of v
entil
atio
n sp
ecifi
ed b
y Ta
ble
5.2c
of A
DF.
b.
For w
all m
ount
ed b
ackg
roun
d ve
ntila
tors
mak
e an
ope
ning
in th
e w
all
in a
ccor
danc
e w
ith th
e m
anuf
actu
rer’s
inst
ruct
ions
for t
he si
ze re
quire
d.
Ensu
re th
at th
ere
are
no o
bstr
uctio
ns in
the
open
ing.
c.
Inst
all t
he w
all o
r win
dow
ven
tilat
or p
rodu
ct in
acc
orda
nce
with
the
man
ufac
ture
r’s in
stru
ctio
ns.
d.
Ensu
re th
at w
all o
r win
dow
ven
tilat
or p
rodu
cts a
re se
aled
to th
eir s
urro
unds
us
ing
a pr
oprie
tary
seal
ant a
s rec
omm
ende
d by
the
man
ufac
ture
r.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
30 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 5
: Sys
tem
3 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
3.0
Ven
tila
tio
n
air i
nle
ts
and
inte
rnal
ai
r tra
nsf
er
(co
nti
nu
ed)
Air
tran
sfer
a.
To e
nsur
e go
od tr
ansf
er o
f air
thro
ugho
ut th
e dw
ellin
g, th
ere
shou
ld b
e an
un
derc
ut o
f min
imum
are
a 76
00 m
m2 i
n al
l int
erna
l doo
rs a
bove
the
fl oor
fi n
ish.
Thi
s is e
quiv
alen
t to
an u
nder
cut o
f 10
mm
for a
stan
dard
760
mm
w
idth
doo
r.b.
En
sure
that
the
air t
rans
fer p
rovi
sion
is u
nres
tric
ted
afte
r fl o
or fi
nish
es h
ave
been
laid
(e.g
. car
pets
shou
ld n
ot e
ncro
ach)
. Thi
s sho
uld
be a
chie
ved
by
mak
ing
an u
nder
cut o
f 10
mm
abo
ve th
e fl o
or fi
nish
if th
e fl o
or fi
nish
is
fi tte
d, o
r by
a 20
mm
und
ercu
t abo
ve th
e fl o
orbo
ards
, or o
ther
surf
ace,
if
the
fi nis
h ha
s not
bee
n fi t
ted.
4.0
Ro
om
ext
ract
ai
r ter
min
als/
gri
lles
Extr
act t
erm
inal
s/g
rille
s –
gen
eral
no
tes
a.
All
room
air
extr
act t
erm
inal
s sho
uld
be in
stal
led
as d
etai
led
by th
e sy
stem
de
sign
er.
b.
Room
air
extr
act t
erm
inal
s sho
uld
be in
stal
led
as c
lose
to c
eilin
g le
vel a
s pr
actic
al, t
o en
sure
war
m m
oist
air
is re
mov
ed fr
om e
ach
spac
e.
Fixe
d te
rmin
als
– g
rille
s o
r lo
uve
rsa.
If
the
room
ext
ract
air
term
inal
s are
fi xe
d, e
nsur
e th
at e
ffec
tive
bala
ncin
g of
th
e sy
stem
can
be
achi
eved
. If a
faci
lity
is n
ot p
rovi
ded
with
in th
e fa
n un
it th
en d
ampe
rs sh
ould
be
inst
alle
d w
ithin
the
duct
syst
em to
allo
w b
alan
cing
w
hen
the
syst
em is
com
mis
sion
ed.
Ad
just
able
term
inal
s/g
rille
sa.
En
sure
eac
h te
rmin
al/g
rille
can
be
lock
ed in
its c
omm
issi
oned
pos
ition
onc
e sy
stem
bal
ance
has
bee
n ac
hiev
ed. I
t is v
ital f
or th
e co
rrec
t ope
ratio
n of
the
syst
em th
at th
e sy
stem
rem
ains
bal
ance
d in
its c
omm
issi
oned
stat
e.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 3 Continuous mechanical ventilation systems | 31
Tab
le 5
: Sys
tem
3 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
5.0
Exte
rnal
d
isch
arg
e te
rmin
al
Dis
char
ge
term
inal
s –
roo
f an
d w
all m
ou
nte
da.
Pr
oprie
tary
term
inal
s sho
uld
be u
sed.
b.
Ensu
re th
at th
e fr
ee a
rea
of th
e te
rmin
al o
peni
ng is
a m
inim
um o
f 90%
of
the
free
are
a of
the
duct
ing
bein
g us
ed.
c.
The
loca
tion
of th
e ex
tern
al d
isch
arge
term
inal
shou
ld e
nsur
e th
at th
e po
tent
ial f
or re
circ
ulat
ion
of e
xtra
ct a
ir th
roug
h ve
ntila
tion
air i
nlet
s is
min
imis
ed.
6.0
Co
ntr
ols
Co
ntr
ols
– g
ener
al n
ote
sa.
C
ontin
uous
ven
tilat
ion
syst
ems s
houl
d no
t allo
w th
e oc
cupi
er to
turn
off
the
fan
othe
r tha
n at
the
loca
l iso
lato
r. Pr
ovis
ion
of a
n on
/off
func
tion
will
resu
lt in
the
fans
bei
ng o
pera
ted
inte
rmitt
ently
and
the
requ
ired
cont
inuo
us a
ir fl o
w v
entil
atio
n ra
tes n
ot b
eing
ach
ieve
d.b.
W
here
sens
ors a
re n
ot p
re-in
stal
led
with
in th
e fa
n un
it, o
r add
ition
al
optio
nal s
enso
rs c
an b
e in
stal
led,
onl
y th
e se
nsor
s spe
cifi e
d by
the
man
ufac
ture
r of t
he fa
n un
it sh
ould
be
inst
alle
d.c.
If
sens
ors a
re d
uct m
ount
ed, t
heir
loca
tion
shou
ld b
e no
ted
and
prov
isio
n fo
r ac
cess
for m
aint
enan
ce o
r rep
lace
men
t mad
e.d.
If
cont
rol o
f the
fan
spee
d is
und
erta
ken
man
ually
, the
ope
ratio
n of
the
fan
in b
oost
mod
e sh
ould
be
mad
e ob
viou
s. T
his w
ill m
inim
ise
the
likel
ihoo
d of
it
bein
g le
ft in
this
mod
e un
nece
ssar
ily.
e.
Hum
idity
con
trol
shou
ld n
ot b
e us
ed in
sani
tary
acc
omm
odat
ion,
whe
re
odou
r is t
he m
ain
pollu
tant
.
Inst
alla
tion
of a
ltern
ativ
e se
nsor
s m
ay re
sult
in c
ontr
ol fu
nctio
ns n
ot
perf
orm
ing
corr
ectly
.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
32 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 5
: Sys
tem
3 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
6.0
Co
ntr
ols
(c
on
tin
ued
)
Co
ntr
ols
– lo
cati
on
an
d c
on
fi g
ura
tio
na.
In
stal
latio
n of
man
ual c
ontr
ols f
or th
e sy
stem
mus
t mee
t the
requ
irem
ents
of
Par
t M o
f the
Bui
ldin
g Re
gula
tions
.b.
In
stal
latio
n of
room
sens
ors s
houl
d fo
llow
the
man
ufac
ture
r’s g
uida
nce
on
posi
tioni
ng.
c.
Whe
re c
ontr
ol o
f the
fan
spee
d is
und
erta
ken
man
ually
, sw
itchi
ng sh
ould
be
pro
vide
d lo
cally
to th
e sp
aces
bei
ng se
rved
, i.e
. bat
hroo
ms a
nd k
itche
n.
Prov
isio
n of
a si
ngle
cen
tral
ly lo
cate
d sw
itch
is n
ot su
ffi ci
ent a
nd w
ill re
sult
in
fans
bei
ng le
ft in
inap
prop
riate
mod
es o
f ope
ratio
n.
App
rove
d D
ocum
ent M
, Sec
tion
8.3,
re
com
men
ds th
at sw
itche
s sho
uld
be lo
cate
d be
twee
n 45
0 m
m a
nd
1200
mm
from
fi ni
shed
fl oo
r lev
el.
7.0
Co
nti
nu
ou
s ex
trac
t fan
s:
dec
entr
alis
ed
In-d
uct
inst
alla
tio
na.
Th
e fa
n un
it sh
ould
be
adeq
uate
ly su
ppor
ted
usin
g th
e m
anuf
actu
rer’s
su
pplie
d or
reco
mm
ende
d fi x
ing
brac
kets
.b.
A
cces
s sho
uld
be p
rovi
ded
to th
e fa
n un
it fo
r mai
nten
ance
and
repl
acem
ent
at th
e en
d of
its o
pera
tiona
l life
.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 3 Continuous mechanical ventilation systems | 33
Tab
le 6
: Sys
tem
3 in
spec
tio
n, t
esti
ng
an
d c
om
mis
sio
nin
g
Rec
om
men
ded
min
imu
m re
qu
irem
ents
Sup
ple
men
tary
info
rmat
ion
1.0
Syst
em
ove
rvie
w
Vis
ual
insp
ecti
on
sC
arry
out
the
follo
win
g ch
ecks
and
reco
rd th
e re
sults
in S
ectio
n 5:
a.
Doe
s the
syst
em in
stal
latio
n co
mpl
y w
ith th
e in
stal
latio
n cl
ause
s in
Tabl
e 5?
b.
Is th
e sy
stem
inst
alle
d in
acc
orda
nce
with
des
ign
crite
ria?
c.
Is a
ll du
ctw
ork
and
are
all t
erm
inal
s in
good
con
ditio
n w
ith n
o ob
viou
s de
fect
s tha
t will
be
haza
rdou
s or a
ffec
t sys
tem
per
form
ance
?
Init
ial s
tart
-up
a.
Is th
e ai
r fl o
w d
irect
ion
corr
ect a
t eac
h ro
om te
rmin
al?
b.
Are
ther
e an
y ab
norm
al n
oise
s on
star
t-up
or w
hen
the
syst
em is
runn
ing
in
norm
al b
ackg
roun
d ve
ntila
tion
mod
e?
Som
e fa
n un
its h
ave
a st
art-
up
diag
nost
ic se
quen
ce th
at ru
ns th
e fa
ns a
t max
imum
spee
d fo
r a p
erio
d be
fore
reve
rtin
g to
nor
mal
ope
ratio
n –
refe
r to
the
man
ufac
ture
r’s o
pera
ting
inst
ruct
ions
.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
34 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 6
: Sys
tem
3 in
spec
tio
n, t
esti
ng
an
d c
om
mis
sio
nin
g
Min
imu
m re
qu
irem
ents
Sup
ple
men
tary
info
rmat
ion
2.0
Com
mis
sion
ing:
ai
r fl o
w
bal
anci
ng
an
d
mea
sure
men
t
Air
fl o
w b
alan
cin
ga.
Th
e sy
stem
shou
ld b
e ba
lanc
ed to
ens
ure
that
des
ign
air fl
ow
rate
s are
ac
hiev
ed a
t eac
h ro
om te
rmin
al/g
rille
. As t
here
are
seve
ral c
ombi
natio
ns o
f ro
om te
rmin
al/g
rille
(ref
erre
d to
as a
term
inal
from
her
e on
) and
fan
cont
rol
that
may
be
used
in d
omes
tic sy
stem
s, th
e fa
n m
anuf
actu
rer’s
inst
ruct
ions
sh
ould
be
follo
wed
to a
chie
ve b
alan
cing
. If s
peci
fi c d
etai
ls a
re n
ot in
clud
ed
the
follo
win
g pr
oced
ure
shou
ld b
e ad
opte
d:i.
Ad
just
able
term
inal
s an
d a
fi xe
d (s
tep
ped
) sp
eed
fan
.Th
e fa
n sp
eed
shou
ld b
e se
t to
achi
eve
the
desi
red
cont
inuo
us fl
ow ra
te.
The
inde
x te
rmin
al fl
ow ra
te is
set t
o fu
lly o
pen
and
all o
ther
gril
les a
re
adju
sted
to a
chie
ve th
e re
quire
d fl o
ws a
t eac
h te
rmin
al.
If
the
tota
l fl o
w ra
te c
anno
t be
achi
eved
thro
ugh
all t
he te
rmin
als t
hen
the
fan
spee
d sh
ould
be
incr
ease
d.
If al
l the
term
inal
s hav
e to
be
clos
ed si
gnifi
cant
ly to
ach
ieve
onl
y th
e re
quire
d ai
r fl o
w ra
te th
en re
duce
the
fan
spee
d an
d re
bala
nce
the
term
inal
s.ii.
A
dju
stab
le te
rmin
als
and
co
ntr
olla
ble
sp
eed
fan
.
The
fan
spee
d sh
ould
be
set a
ppro
xim
atel
y to
ach
ieve
the
desi
red
cont
inuo
us fl
ow ra
te.
Th
e in
dex
term
inal
fl ow
rate
is se
t with
the
term
inal
fully
ope
n an
d al
l oth
er te
rmin
als a
re a
djus
ted
to a
chie
ve th
e re
quire
d fl o
ws a
t eac
h te
rmin
al.
If
the
inde
x te
rmin
al h
as to
be
clos
ed to
ach
ieve
onl
y th
e re
quire
d ai
r fl o
w ra
te, t
hen
redu
ce th
e fa
n sp
eed
and
reba
lanc
e th
e te
rmin
als.
No
te: T
his
is th
e ap
pro
ved
p
roce
du
re fo
r co
mm
issi
on
ing
as
req
uir
ed b
y th
e B
uild
ing
R
egu
lati
on
s.Th
e in
dex
term
inal
/gril
le c
an b
e as
sum
ed to
be
the
term
inal
furt
hest
fr
om th
e fa
n un
it.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 3 Continuous mechanical ventilation systems | 35
Tab
le 6
: Sys
tem
3 in
spec
tio
n, t
esti
ng
an
d c
om
mis
sio
nin
g (c
on
tin
ued
)
Min
imu
m re
qu
irem
ents
Sup
ple
men
tary
info
rmat
ion
2.0
Com
mis
sion
ing:
ai
r fl o
w
bal
anci
ng
an
d
mea
sure
men
t (c
on
tin
ued
)
iii.
Fixe
d te
rmin
als
wit
h fl
ow
ad
just
men
t by
du
ct d
amp
er o
r sim
ilar
dev
ice
at th
e fa
n u
nit
.A
s i. o
r ii.
abov
e de
pend
ing
on th
e ty
pe o
f fan
spee
d co
ntro
l.iv
. A
dju
stab
le te
rmin
als
and
fi xe
d v
olu
me
fl o
w fa
n.
Th
e fa
n sp
eed
shou
ld b
e se
t to
achi
eve
the
desi
red
cont
inuo
us fl
ow ra
te.
The
inde
x te
rmin
al fl
ow ra
te is
set w
ith th
e te
rmin
al fu
lly o
pen
and
all o
ther
term
inal
s are
adj
uste
d to
ach
ieve
the
requ
ired
fl ow
s at e
ach
term
inal
. Adj
ustm
ent o
f the
term
inal
s ach
ieve
s bal
anci
ng o
nly;
tota
l fl o
w ra
te is
gov
erne
d by
the
fan
cont
rol s
ettin
g. G
reat
car
e sh
ould
be
take
n no
t to
clos
e th
e te
rmin
als t
oo fa
r as t
he fa
n un
it w
ill a
lway
s m
aint
ain
a co
nsta
nt v
olum
etric
fl ow
rate
; clo
sing
the
term
inal
s will
onl
y re
quire
the
fan
to w
ork
hard
er to
ach
ieve
a g
iven
air
fl ow
rate
.v.
Fi
xed
term
inal
s w
ith
au
tom
atic
fl o
w a
dju
stm
ent a
t th
e fa
n u
nit
.
The
fan
spee
d sh
ould
be
set t
o ac
hiev
e th
e de
sire
d co
ntin
uous
fl ow
rate
.Th
e fl o
ws a
re b
alan
ced
by a
utom
atic
dev
ices
loca
ted
with
in th
e fa
n un
it,
and
no a
djus
tmen
t can
be
mad
e.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
36 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 6
: Sys
tem
3 in
spec
tio
n, t
esti
ng
an
d c
om
mis
sio
nin
g (c
on
tin
ued
)
Min
imu
m re
qu
irem
ents
Sup
ple
men
tary
info
rmat
ion
2.0
Com
mis
sion
ing:
ai
r fl o
w
bal
anci
ng
an
d
mea
sure
men
t (c
on
tin
ued
)
Air
fl o
w m
easu
rem
ents
a.
Ensu
re th
at b
ackg
roun
d ve
ntila
tors
or o
ther
air
tran
sfer
dev
ices
are
ope
n.b.
En
sure
all
inte
rnal
and
ext
erna
l doo
rs a
nd w
indo
ws a
re c
lose
d, in
clud
ing
room
s in
whi
ch m
easu
rem
ents
are
bei
ng c
arrie
d ou
t.c.
A
ir fl o
w m
easu
rem
ents
shou
ld b
e pe
rfor
med
usi
ng a
cal
ibra
ted
air fl
ow
de
vice
with
pro
prie
tary
hoo
d at
tach
men
t and
resu
lts re
cord
ed in
litr
es p
er
seco
nd (l
/s).
Refe
renc
e sh
ould
be
mad
e to
des
ign
air fl
ow
rate
s.d.
Re
cord
the
air fl
ow
rate
at e
ach
room
term
inal
on
the
com
mis
sion
ing
shee
t in
Sect
ion
5, a
long
with
the
desi
gn a
ir fl o
w ra
te fo
r eac
h te
rmin
al.
Mea
sure
men
ts sh
ould
be
take
n at
bot
h m
axim
um ra
te a
nd m
inim
um ra
te
fan
spee
ds.
e.
It is
reco
mm
ende
d th
at a
van
e an
emom
eter
or s
imila
r dev
ice
is u
sed
to b
alan
ce a
nd m
easu
re th
e ai
r fl o
w ra
tes a
t eac
h ro
om te
rmin
al. T
he
inst
rum
ent w
ill re
quire
a h
ood
to b
e at
tach
ed to
allo
w it
to c
over
the
term
inal
.f.
Th
e in
stru
men
t sho
uld
be c
alib
rate
d an
nual
ly a
nd b
e ca
pabl
e of
ach
ievi
ng
an a
ccur
acy
of ±
5 p
er c
ent.
No
te: T
his
is th
e ap
pro
ved
p
roce
du
re fo
r air
fl o
w
mea
sure
men
t as
req
uir
ed b
y th
e B
uild
ing
Reg
ula
tio
ns.
The
mos
t com
mon
met
hod
is th
e us
e of
a v
ane
anem
omet
er, o
r sim
ilar,
plac
ed in
a h
ood
whi
ch c
over
s the
te
rmin
al to
mea
sure
the
extr
act a
ir fl o
w ra
te.
Cal
ibra
tion
of m
easu
rem
ent
equi
pmen
t sho
uld
be u
nder
take
n an
nual
ly b
y re
turn
ing
the
inst
rum
ent
to a
UK
AS
accr
edite
d ca
libra
tion
cent
re.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 3 Continuous mechanical ventilation systems | 37
Tab
le 6
: Sys
tem
3 in
spec
tio
n, t
esti
ng
an
d c
om
mis
sio
nin
g (c
on
tin
ued
)
Rec
om
men
ded
min
imu
m re
qu
irem
ents
Sup
ple
men
tary
info
rmat
ion
3.0
Co
ntr
ols
Inst
alla
tio
na.
En
sure
all
loca
l con
trol
s hav
e be
en in
stal
led
follo
win
g th
e m
anuf
actu
rer’s
in
stru
ctio
ns.
b.
Ensu
re a
ll lo
cal c
ontr
ols a
re a
dequ
atel
y la
belle
d, in
dica
ting
thei
r fun
ctio
n cl
early
.c.
If
sens
ors h
ave
been
inst
alle
d se
para
tely
from
the
fan
unit
ensu
re in
stal
latio
n fo
llow
s the
man
ufac
ture
r’s in
stru
ctio
ns.
d.
Whe
re c
ontr
ol o
f the
fan
is a
utom
ated
, the
con
trol
s sho
uld
be c
onfi g
ured
to
min
imis
e th
e oc
curr
ence
of h
untin
g.e.
If
man
ual c
ontr
ol is
pro
vide
d, c
lear
and
det
aile
d in
stru
ctio
ns sh
ould
be
mad
e av
aila
ble
to th
e oc
cupi
er.
If hu
ntin
g (th
e co
ntin
ual i
ncre
ase
and
decr
ease
of f
an sp
eed)
doe
s oc
cur,
occu
pant
s may
seek
to m
odify
th
e co
ntro
l of t
he sy
stem
or t
urn
it of
f alto
geth
er to
rem
ove
the
noise
nu
isanc
e.
Test
ing
op
erat
ion
a.
As f
ar a
s pra
ctic
al th
e co
rrec
t ope
ratio
n of
eac
h co
ntro
l fun
ctio
n sh
ould
be
test
ed.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
38 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 7
: Sys
tem
4 in
stal
lati
on
gu
idel
ines
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
1.0
Co
nti
nu
ou
s su
pp
ly a
nd
ex
trac
t wit
h
hea
t rec
ove
ry:
cen
tral
ised
Co
nti
nu
ou
s si
ng
le ro
om
su
pp
ly a
nd
ex
trac
t wit
h
hea
t rec
ove
ry
Man
ufa
ctu
rer’s
det
ails
an
d s
pec
ifi c
inst
ruct
ion
sa.
Th
e in
form
atio
n pr
ovid
ed in
this
Tabl
e se
ts o
ut th
e m
inim
um re
com
men
ded
proc
edur
es fo
r typ
ical
Sys
tem
4 in
stal
latio
ns.
b.
For f
urth
er p
rodu
ct-s
peci
fi c in
form
atio
n, re
fer t
o th
e m
anuf
actu
rer’s
in
stal
latio
n in
stru
ctio
ns.
c.
The
suita
bilit
y of
con
nect
ion
of a
con
tinuo
us fa
n sy
stem
to a
coo
ker h
ood
mus
t fol
low
the
man
ufac
ture
r’s g
uida
nce.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 3 Continuous mechanical ventilation systems | 39
Tab
le 7
: Sys
tem
4 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
1.0
Co
nti
nu
ou
s su
pp
ly a
nd
ex
trac
t wit
h
hea
t rec
ove
ry:
cen
tral
ised
Co
nti
nu
ou
s si
ng
le ro
om
su
pp
ly a
nd
ex
trac
t wit
h
hea
t rec
ove
ry
(co
nti
nu
ed)
Loca
tio
n o
f fan
un
ita.
Th
e fa
n un
it sh
ould
be
loca
ted
as sp
ecifi
ed b
y th
e sy
stem
des
igne
r.b.
Fa
n un
its sh
ould
be
inst
alle
d to
allo
w su
ffi ci
ent s
pace
to u
nder
take
rout
ine
mai
nten
ance
on
fi lte
rs a
nd h
eat e
xcha
nger
blo
ck a
s app
ropr
iate
.c.
Fa
n un
its sh
ould
be
inst
alle
d to
allo
w su
ffi ci
ent s
pace
for e
nd o
f life
re
plac
emen
t of t
he w
hole
uni
t or o
f key
mec
hani
cal/e
lect
rical
com
pone
nts.
Th
is sh
ould
be
achi
evab
le w
ithou
t the
nee
d to
rem
ove
fi xed
stru
ctur
es o
r si
gnifi
cant
leng
ths o
f con
nect
ed d
uctw
ork.
d.
The
fan
unit
shou
ld b
e in
stal
led
on a
soun
d st
ruct
ure,
whi
ch is
stab
le a
nd
leve
l.e.
If
the
fan
unit
is n
ot p
re-in
sula
ted,
insu
latio
n sh
ould
be
adde
d to
min
imis
e th
e ris
k of
con
dens
atio
n fo
rmin
g w
ithin
, or o
n, th
e fa
n un
it ca
sing
.f.
A
con
dens
ate
drai
n sh
ould
be
inst
alle
d fr
om th
e fa
n un
it to
an
appr
opria
te
drai
n lo
catio
n. T
he c
onde
nsat
e pi
pe sh
ould
be
inst
alle
d to
hav
e a
min
imum
5º
fall
from
the
fan
unit.
g.
The
cond
ensa
te d
rain
shou
ld b
e ad
equa
tely
secu
red
and
whe
re p
assi
ng
thro
ugh
an u
nhea
ted
spac
e m
ust b
e ad
equa
tely
insu
late
d to
pre
vent
fr
eezi
ng.
Ad
dit
ion
al n
ote
s fo
r SR
HRV
a.
Do
not i
nsta
ll th
e un
it in
the
corn
er o
f a ro
om a
s thi
s may
resu
lt in
shor
t ci
rcui
ting
of a
ir fl o
ws.
The
loca
tion
of th
e fa
n un
it sh
ould
be
cho
sen
to m
inim
ise o
vera
ll du
ct
run
leng
th, b
oth
from
the
inte
rnal
te
rmin
als/
grill
es to
the
fan
unit
and
from
the
fan
unit
to th
e ex
tern
al
disc
harg
e te
rmin
al.
Unc
ondi
tione
d sp
aces
, e.g
. lof
ts,
may
bec
ome
very
hot
in su
mm
er,
whi
ch m
ay h
ave
impl
icat
ions
for b
oth
mec
hani
cal a
nd e
lect
roni
c co
mpo
nent
lif
e –
refe
r to
the
man
ufac
ture
r’s
spec
ifi ca
tion
for a
ppro
pria
te
envi
ronm
enta
l con
ditio
ns.
The
fan
unit
spig
ot a
rran
gem
ent
may
dic
tate
the
loca
tion
and
orie
ntat
ion
of in
stal
latio
n: to
ens
ure
optim
um p
erfo
rman
ce re
fer t
o th
e m
anuf
actu
rer’s
inst
ruct
ions
.Th
e ra
te o
f con
dens
ate
form
atio
n m
ay
be u
p to
seve
ral l
itres
per
day
, and
this
sh
ould
be
cons
ider
ed w
hen
choo
sing
the
drai
n lo
catio
n.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
40 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 7
: Sys
tem
4 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
1.0
Co
nti
nu
ou
s su
pp
ly a
nd
ex
trac
t wit
h
hea
t rec
ove
ry:
cen
tral
ised
Co
nti
nu
ou
s si
ng
le ro
om
su
pp
ly a
nd
ex
trac
t wit
h
hea
t rec
ove
ry
(co
nti
nu
ed)
Prep
arat
ion
for i
nst
alla
tio
na.
A
hol
e of
a su
itabl
e di
men
sion
thro
ugh
the
fabr
ic o
f the
bui
ldin
g w
ill
be re
quire
d fo
r the
inst
alla
tion
of th
e du
ct. T
he h
ole
will
nee
d a
slig
ht
dow
nwar
d an
gle
tow
ards
the
outs
ide
to p
reve
nt w
ater
ingr
ess.
b.
Whe
re d
uctw
ork
pene
trat
es a
bui
ldin
g’s a
ir ba
rrie
r, th
e co
ntin
uity
of t
he
barr
ier m
ust b
e m
aint
aine
d. T
he n
atur
e of
the
barr
ier a
nd e
ase
of a
chie
ving
an
eff
ectiv
e se
al sh
ould
be
cons
ider
ed b
efor
e ho
les a
re d
rille
d.c.
Fo
r cei
ling
mou
nted
fans
or t
erm
inal
s/gr
illes
, the
hol
es sh
ould
be
cut t
o th
e m
inim
um re
quire
d siz
e su
ch th
at th
e fa
n/gr
ille
spig
ot fi
ts sn
ugly
into
the
hole
.d.
It
is im
port
ant t
o co
nsid
er th
e pl
anni
ng a
nd in
stal
latio
n of
duc
twor
k in
co-
ordi
natio
n w
ith o
ther
trad
e ac
tiviti
es a
nd in
stal
latio
ns, s
uch
that
rout
es a
re
desi
gned
with
out c
ompr
omis
e to
the
requ
ired
vent
ilatio
n ai
r fl o
w ra
tes.
Inst
alla
tio
na.
Th
e fa
n un
it sh
ould
be
inst
alle
d us
ing
the
man
ufac
ture
r’s su
pplie
d or
re
com
men
ded
fi xin
g br
acke
ts.
Aco
ustic
/ant
i-vib
ratio
n iso
latio
n m
ay b
e re
quire
d. T
his w
ill d
epen
d on
the
natu
re o
f the
mou
ntin
g st
ruct
ure
– re
fer t
o th
e m
anuf
actu
rer’s
in
stru
ctio
ns.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 3 Continuous mechanical ventilation systems | 41
Tab
le 7
: Sys
tem
4 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
2.0
Du
ctw
ork
Du
ct in
stal
lati
on
– g
ener
al n
ote
sa.
D
ucts
shou
ld b
e si
zed
to m
inim
ise
pres
sure
loss
and
noi
se g
ener
atio
n. T
his i
s ac
hiev
ed b
y si
zing
of t
he d
ucts
to li
mit
the
air v
eloc
ity.
b.
The
rout
ing
of d
ucts
shou
ld a
im to
min
imis
e ov
eral
l duc
t len
gth
and
min
imis
e th
e nu
mbe
r of b
ends
requ
ired.
It is
par
ticul
arly
impo
rtan
t to
min
imis
e be
nds i
n m
ain
duct
s ope
ratin
g at
hig
her a
ir ve
loci
ties.
c.
The
need
for p
rivac
y (a
cous
tic se
para
tion)
bet
wee
n ro
oms s
houl
d be
co
nsid
ered
whe
n pl
anni
ng d
uct l
ayou
t.d.
W
here
room
air
extr
act t
erm
inal
s/gr
illes
are
not
fi tt
ed w
ith fi
lters
, co
nsid
erat
ion
shou
ld b
e gi
ven
to th
e ne
ed to
acc
ess d
ucts
for c
lean
ing.
e.
Duc
ting
shou
ld b
e in
sula
ted
whe
re it
pas
ses t
hrou
gh u
nhea
ted
area
s and
vo
ids (
e.g.
loft
spac
es) w
ith th
e eq
uiva
lent
of a
t lea
st 2
5 m
m o
f a m
ater
ial
havi
ng a
ther
mal
con
duct
ivity
of ≤
0.04
W/(m
.K) t
o re
duce
the
poss
ibili
ty o
f co
nden
satio
n fo
rmin
g. W
here
a d
uct e
xten
ds e
xter
nally
abo
ve ro
of le
vel t
he
sect
ion
abov
e th
e ro
of sh
ould
be
insu
late
d or
a c
onde
nsat
e tr
ap sh
ould
be
fi tte
d ju
st b
elow
roof
leve
l.
The
duct
size
and
type
spec
ifi ed
by
the
syst
em d
esig
ner s
houl
d al
way
s be
used
, to
min
imise
pre
ssur
e lo
ss a
nd
noise
gen
erat
ion.
Mai
n du
cts s
houl
d be
run
at th
e sa
me
size
as th
e fa
n un
it sp
igot
. Duc
t siz
e sh
ould
then
be
redu
ced
for b
ranc
h du
cts.
A ra
dial
layo
ut m
ay a
chie
ve a
cous
tic
sepa
ratio
n m
ore
effe
ctiv
ely
than
a
bran
ched
layo
ut.
The
perf
orm
ance
of t
he v
entil
atio
n sy
stem
relie
s on
effi c
ient
air
dist
ribut
ion
and
it is
vita
l tha
t duc
t in
stal
latio
n is
not l
eft u
ntil
the
last
m
omen
t whe
n th
e on
ly m
eans
of
over
com
ing
obst
ruct
ions
is to
inst
all
fl exi
ble
duct
s whe
re ri
gid
duct
s hav
e be
en sp
ecifi
ed.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
42 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 7
: Sys
tem
4 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
2.0
Du
ctw
ork
(c
on
tin
ued
)
a.
Duc
ts w
ithin
the
build
ing
heat
ed e
nvel
ope
carr
ying
col
d ai
r bet
wee
n th
e ex
tern
al su
pply
/dis
char
ge te
rmin
als a
nd th
e fa
n un
it sh
ould
be
insu
late
d an
d w
rapp
ed a
dditi
onal
ly w
ith a
vap
our b
arrie
r out
side
the
insu
latio
n to
pre
vent
co
nden
satio
n oc
curr
ing
with
in th
e in
sula
tion
mat
eria
l.b.
H
oriz
onta
l duc
ting,
incl
udin
g du
ctin
g in
wal
ls, s
houl
d be
arr
ange
d to
slop
e sl
ight
ly d
ownw
ards
aw
ay fr
om th
e fa
n to
pre
vent
bac
kfl o
w o
f any
moi
stur
e in
to th
e pr
oduc
t.c.
Ve
rtic
al d
uctin
g w
ill re
quire
a c
onde
nsat
e tr
ap in
ord
er to
pre
vent
bac
kfl o
w
of a
ny m
oist
ure
into
the
prod
uct.
d.
Perf
orat
ed in
sula
ted
fl exi
duc
t, u
sed
to m
inim
ise
airb
orne
aco
ustic
tr
ansm
issi
on, s
houl
d no
t be
used
bet
wee
n th
e fa
n un
it an
d ex
tern
al
disc
harg
e te
rmin
al to
pre
vent
con
dens
atio
n oc
curr
ing
with
in th
e in
sula
tion
mat
eria
l.e.
W
here
duc
twor
k pe
netr
ates
a b
uild
ing’
s air
barr
ier,
iden
tify
on b
uild
ing
draw
ings
and
ens
ure
that
con
tinui
ty o
f bar
rier i
s mai
ntai
ned.
f.
Whe
re d
ucts
pas
s thr
ough
fi re
bar
riers
, the
y m
ust b
e ap
prop
riate
ly fi
re
stop
ped
in a
ccor
danc
e w
ith th
e re
quire
men
ts o
f Par
t B o
f the
Bui
ldin
g Re
gula
tions
(Fire
safe
ty).
Inst
alla
tio
n o
f du
cts
– ri
gid
a.
Duc
ts sh
ould
not
be
inst
alle
d w
here
they
can
be
dam
aged
, for
exa
mpl
e ac
ross
ope
n lo
ft a
reas
whe
re th
ey m
ay b
e st
ood
on o
r hav
e ite
ms p
lace
d on
th
em, b
reak
ing
seal
s and
pos
sibl
y cr
ushi
ng th
e du
ct.
b.
Con
nect
ion
of c
ompo
nent
s sho
uld
not r
esul
t in
sign
ifi ca
nt a
ir fl o
w
resi
stan
ce. C
ompo
nent
s sho
uld
be p
ropr
ieta
ry a
nd fi
t eas
ily to
geth
er
with
out d
isto
rtio
n.c.
Ri
gid
duct
runs
mus
t be
adeq
uate
ly su
ppor
ted.
Dist
ortio
n of
rect
angu
lar d
uct m
ay
resu
lt in
sign
ifi ca
nt re
duct
ion
of
the
free
inte
rnal
are
a of
the
duct
, in
crea
sing
the
fl ow
resis
tanc
e an
d m
akin
g se
alin
g m
ore
diffi
cul
t.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 3 Continuous mechanical ventilation systems | 43
Tab
le 7
: Sys
tem
4 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
2.0
Du
ctw
ork
(c
on
tin
ued
)
Inst
alla
tio
n o
f du
cts
– fl
exib
lea.
D
ucts
shou
ld n
ot b
e in
stal
led
whe
re th
ey c
an b
e da
mag
ed, f
or e
xam
ple
acro
ss o
pen
loft
are
as w
here
they
may
be
stoo
d on
or h
ave
item
s pla
ced
on
them
, cru
shin
g th
e du
ct a
nd re
stric
ting
or p
reve
ntin
g al
l air
fl ow
thro
ugh
the
duct
.b.
Fl
exib
le d
uct s
houl
d be
pul
led
taug
ht to
ens
ure
that
the
full
inte
rnal
dia
met
er
is o
btai
ned
and
fl ow
resi
stan
ce m
inim
ised
. Thi
s is c
onsi
dere
d to
hav
e be
en
achi
eved
if th
e du
ct is
ext
ende
d to
90
per c
ent o
f its
max
imum
leng
th.
c.
Flex
ible
duc
twor
k sh
ould
be
supp
orte
d at
suita
ble
inte
rval
s to
min
imis
e sa
ggin
g.d.
Be
nds i
n fl e
xibl
e du
ct sh
ould
hav
e a
min
imum
insi
de ra
dius
equ
al to
the
diam
eter
of t
he d
uct –
see
Dia
gram
1. I
f tig
hter
ben
ds a
re re
quire
d, ri
gid
bend
s sho
uld
be u
sed.
It is
sugg
este
d th
at fl
exib
le d
ucts
sh
ould
be
supp
orte
d at
inte
rval
s not
ex
ceed
ing
600
mm
.
Du
ct c
on
nec
tio
ns
a.
All
duct
con
nect
ions
requ
ire se
alin
g. W
here
duc
ts a
re in
stal
led
agai
nst a
so
lid st
ruct
ure
this
can
be
diffi
cult
to a
chie
ve. I
n su
ch lo
catio
ns p
reas
sem
bly
of d
uct s
ectio
ns sh
ould
be
cons
ider
ed. T
his w
ill re
quire
that
con
nect
ions
are
pe
rman
ent t
o en
sure
the
seal
is m
aint
aine
d du
ring
inst
alla
tion.
b.
Whe
re a
cces
s to
duct
s will
not
be
poss
ible
aft
er c
onst
ruct
ion
is c
ompl
ete,
i.e
. with
in fl
oor a
nd w
all v
oids
, con
side
ratio
n sh
ould
be
give
n to
per
man
ent
conn
ectio
n an
d se
alin
g w
ith a
n ap
prop
riate
non
-har
deni
ng se
alan
t, a
nd n
ot
usin
g du
ct ta
pe to
ach
ieve
con
nect
ion
and
seal
ing.
c.
Con
nect
ion
of le
ngth
s of fl
exi
ble
duct
mus
t use
a ri
gid
conn
ecto
r and
jubi
lee
clip
s or s
imila
r to
ensu
re a
long
term
seal
is a
chie
ved.
Con
nect
ions
of l
engt
hs
of fl
exib
le d
uct s
houl
d no
t be
tape
d-on
ly.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
44 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 7
: Sys
tem
4 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
3.0
Inte
rnal
ve
nti
lati
on
air
tr
ansf
er
Air
tran
sfer
a.
To e
nsur
e go
od tr
ansf
er o
f air
thro
ugho
ut th
e dw
ellin
g, th
ere
shou
ld b
e an
un
derc
ut o
f min
imum
are
a 76
00 m
m2 i
n al
l int
erna
l doo
rs a
bove
the
fl oor
fi n
ish.
Thi
s is e
quiv
alen
t to
an u
nder
cut o
f 10
mm
for a
stan
dard
760
mm
w
idth
doo
r.b.
En
sure
that
the
air t
rans
fer p
rovi
sion
is u
nres
tric
ted
afte
r fl o
or fi
nish
es h
ave
been
laid
(e.g
. car
pets
shou
ld n
ot e
ncro
ach)
. Thi
s sho
uld
be a
chie
ved
by
mak
ing
an u
nder
cut o
f 10
mm
abo
ve th
e fl o
or fi
nish
if th
e fl o
or fi
nish
is
fi tte
d, o
r by
a 20
mm
und
ercu
t abo
ve th
e fl o
orbo
ards
, or o
ther
surf
ace,
if
the
fi nis
h ha
s not
bee
n fi t
ted.
Ad
dit
ion
al n
ote
s fo
r SR
HRV
a.
Free
air
mov
emen
t bet
wee
n ro
oms i
s not
requ
ired
as e
ach
room
con
tain
s a
sing
le ro
om h
eat r
ecov
ery
vent
ilato
r (SR
HRV
) uni
t. T
hese
uni
ts h
ave
a ba
lanc
ed su
pply
and
ext
ract
air
fl ow
rate
. It i
s how
ever
reco
mm
ende
d th
at
the
prov
isio
ns in
3a.
and
3b.
are
mai
ntai
ned
to m
inim
ise
any
imba
lanc
e of
fl o
ws w
ithin
room
s.
4.0
Ro
om
su
pp
ly
and
ext
ract
air
te
rmin
als/
gri
lles
Sup
ply
an
d e
xtra
ct te
rmin
als/
gri
lles
– g
ener
al n
ote
sa.
A
ll ro
om a
ir ex
trac
t ter
min
als s
houl
d be
inst
alle
d as
det
aile
d by
the
syst
em
desi
gner
.b.
Ro
om a
ir ex
trac
t ter
min
als s
houl
d be
inst
alle
d as
clo
se to
cei
ling
leve
l as
prac
tical
, to
ensu
re w
arm
moi
st a
ir is
rem
oved
from
eac
h sp
ace.
c.
Room
supp
ly a
ir te
rmin
als m
ust n
ot b
e lo
cate
d ad
jace
nt to
wal
ls, u
nles
s de
sign
ed to
dis
char
ge a
ir aw
ay fr
om th
e w
all,
as th
is m
ay re
sult
in d
own
drau
ghts
.d.
In
ope
n pl
an a
reas
whe
re b
oth
supp
ly a
nd e
xtra
ct te
rmin
als m
ay b
e in
stal
led,
e.
g. k
itche
n di
ners
, the
term
inal
s sho
uld
be a
dequ
atel
y se
para
ted
to e
nsur
e sh
ort c
ircui
ting
is m
inim
ised
.e.
Th
e nu
mbe
r and
loca
tion
of te
rmin
als i
nsta
lled
in a
spac
e sh
ould
ens
ure
effe
ctiv
e ai
r dis
trib
utio
n an
d en
sure
that
air
nois
e is
not
a n
uisa
nce
whe
n th
e sy
stem
is o
pera
ting
at b
oost
air
fl ow
rate
s.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 3 Continuous mechanical ventilation systems | 45
Tab
le 7
: Sys
tem
4 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
4.0
Ro
om
su
pp
ly
and
ext
ract
air
te
rmin
als/
gri
lles
(co
nti
nu
ed)
Fixe
d te
rmin
als
– g
rille
s o
r lo
uve
rsa.
If
the
supp
ly a
nd e
xtra
ct a
ir te
rmin
als a
re fi
xed,
ens
ure
that
eff
ectiv
e ba
lanc
ing
of th
e sy
stem
can
be
achi
eved
. If a
faci
lity
is n
ot p
rovi
ded
with
in
the
fan
unit
then
dam
pers
shou
ld b
e in
stal
led
with
in th
e du
ct sy
stem
to
allo
w b
alan
cing
whe
n th
e sy
stem
is c
omm
issi
oned
.
Ad
just
able
term
inal
s/g
rille
sa.
En
sure
eac
h te
rmin
al/g
rille
can
be
lock
ed in
its c
omm
issi
oned
pos
ition
onc
e sy
stem
bal
ance
has
bee
n ac
hiev
ed. I
t is v
ital f
or th
e co
rrec
t ope
ratio
n of
the
syst
em th
at th
e sy
stem
rem
ains
bal
ance
d in
its c
omm
issi
oned
stat
e.
5.0
Exte
rnal
d
isch
arg
e te
rmin
al
MV
HR
Exte
rnal
su
pp
ly a
nd
d
isch
arg
e te
rmin
al
Sup
ply
an
d d
isch
arg
e te
rmin
als
– ro
of a
nd
wal
l mo
un
ted
a.
Prop
rieta
ry te
rmin
als s
houl
d be
use
d.b.
En
sure
that
the
free
are
a of
the
term
inal
ope
ning
is a
min
imum
of 9
0 pe
r ce
nt o
f the
free
are
a of
the
duct
ing
bein
g us
ed.
c.
The
loca
tion
of th
e ex
tern
al d
isch
arge
term
inal
shou
ld e
nsur
e th
at th
e po
tent
ial f
or re
circ
ulat
ion
of e
xtra
ct a
ir th
roug
h th
e su
pply
air
term
inal
is
min
imis
ed.
It is
reco
mm
ende
d th
at th
e su
pply
and
ex
trac
t air
term
inal
s are
sepa
rate
d by
a
min
imum
of 3
00 m
m h
oriz
onta
lly
if pl
aced
on
the
sam
e fa
çade
of a
bu
ildin
g.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
46 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 7
: Sys
tem
4 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
6.0
Co
ntr
ols
Co
ntr
ols
– g
ener
al n
ote
sa.
C
ontin
uous
ven
tilat
ion
syst
ems s
houl
d no
t allo
w th
e oc
cupi
er to
turn
off
the
fan
othe
r tha
n at
the
loca
l iso
lato
r. Pr
ovis
ion
of a
n on
/off
func
tion
will
resu
lt in
the
fans
bei
ng o
pera
ted
inte
rmitt
ently
and
the
requ
ired
cont
inuo
us a
ir fl o
w v
entil
atio
n ra
tes n
ot b
eing
ach
ieve
d.b.
W
here
sens
ors a
re n
ot p
re-in
stal
led
with
in th
e fa
n un
it, o
r add
ition
al
optio
nal s
enso
rs c
an b
e in
stal
led,
onl
y th
e se
nsor
s spe
cifi e
d by
the
man
ufac
ture
r of t
he fa
n un
it sh
ould
be
inst
alle
d.c.
If
sens
ors a
re d
uct m
ount
ed, t
heir
loca
tion
shou
ld b
e no
ted
and
prov
isio
n fo
r ac
cess
for m
aint
enan
ce o
r rep
lace
men
t mad
e.d.
If
cont
rol o
f the
fan
spee
d is
und
erta
ken
man
ually
, the
ope
ratio
n of
the
fan
in b
oost
mod
e sh
ould
be
mad
e ob
viou
s. T
his w
ill m
inim
ise
the
likel
ihoo
d of
it
bein
g le
ft in
this
mod
e un
nece
ssar
ily.
e.
Hum
idity
con
trol
shou
ld n
ot b
e th
e on
ly c
ontr
ol u
sed
in sa
nita
ry
acco
mm
odat
ion,
whe
re o
dour
is th
e m
ain
pollu
tant
.
Inst
alla
tion
of a
ltern
ativ
e se
nsor
s m
ay re
sult
in c
ontr
ol fu
nctio
ns n
ot
perf
orm
ing
corr
ectly
.
Co
ntr
ols
– lo
cati
on
an
d c
on
fi g
ura
tio
na.
In
stal
latio
n of
man
ual c
ontr
ols f
or th
e sy
stem
mus
t mee
t the
requ
irem
ents
of
Par
t M o
f the
Bui
ldin
g Re
gula
tions
.b.
In
stal
latio
n of
room
sens
ors s
houl
d fo
llow
the
man
ufac
ture
r’s g
uida
nce
on
posi
tioni
ng.
c.
Whe
re c
ontr
ol o
f the
fan
spee
d is
und
erta
ken
man
ually
, sw
itchi
ng sh
ould
be
pro
vide
d lo
cally
to th
e sp
aces
bei
ng se
rved
, i.e
. bat
hroo
ms a
nd k
itche
n.
Prov
isio
n of
a si
ngle
cen
tral
ly lo
cate
d sw
itch
is n
ot su
ffi ci
ent a
nd w
ill re
sult
in
fans
bei
ng le
ft in
inap
prop
riate
mod
es o
f ope
ratio
n.
App
rove
d D
ocum
ent M
, Sec
tion
8.3,
re
com
men
ds th
at sw
itche
s sho
uld
be lo
cate
d be
twee
n 45
0 m
m a
nd
1200
mm
from
fi ni
shed
fl oo
r lev
el.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 3 Continuous mechanical ventilation systems | 47
Tab
le 7
: Sys
tem
4 in
stal
lati
on
gu
idel
ines
(co
nti
nu
ed)
Inst
alla
tio
n c
lau
ses
Sup
ple
men
tary
info
rmat
ion
7.0
Sin
gle
roo
m
hea
t rec
ove
ry
ven
tila
tor
(SR
HRV
) d
evic
es
Ven
tila
tio
n o
f wh
ole
bu
ildin
ga.
Th
ese
prod
ucts
pro
vide
bal
ance
d ve
ntila
tion
for o
ne ro
om o
nly;
the
vent
ilatio
n of
all
spac
es sh
ould
mee
t the
requ
irem
ents
of t
he B
uild
ing
Regu
latio
ns.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
48 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 8
: Sys
tem
4 in
spec
tio
n, t
esti
ng
an
d c
om
mis
sio
nin
g
Rec
om
men
ded
min
imu
m re
qu
irem
ents
Sup
ple
men
tary
info
rmat
ion
1.0
Syst
em
ove
rvie
w
Vis
ual
insp
ecti
on
sC
arry
out
the
follo
win
g ch
ecks
and
reco
rd th
e re
sults
in S
ectio
n 5:
a.
Doe
s the
syst
em in
stal
latio
n co
mpl
y w
ith th
e in
stal
latio
n cl
ause
s in
Tabl
e 7?
b.
Is th
e sy
stem
inst
alle
d in
acc
orda
nce
with
des
ign
crite
ria?
c.
Is a
ll du
ctw
ork
and
are
all t
erm
inal
s in
good
con
ditio
n w
ith n
o ob
viou
s de
fect
s tha
t will
be
haza
rdou
s or a
ffec
t the
syst
em p
erfo
rman
ce?
Init
ial s
tart
-up
a.
Is th
e ai
r fl o
w d
irect
ion
corr
ect a
t eac
h ro
om te
rmin
al, s
uppl
y an
d ex
trac
t?b.
A
re th
ere
any
abno
rmal
noi
ses o
n st
art-
up o
r whe
n th
e sy
stem
is ru
nnin
g in
no
rmal
bac
kgro
und
vent
ilatio
n m
ode?
Som
e fa
n un
its h
ave
a st
art-
up d
iagn
ostic
se
quen
ce th
at ru
ns th
e fa
ns a
t max
imum
sp
eed
for a
per
iod
befo
re re
vert
ing
to n
orm
al
oper
atio
n –
refe
r to
the
man
ufac
ture
r’s
oper
atin
g in
stru
ctio
ns.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 3 Continuous mechanical ventilation systems | 49
Tab
le 8
: Sys
tem
4 in
spec
tio
n, t
esti
ng
an
d c
om
mis
sio
nin
g (c
on
tin
ued
)
Min
imu
m re
qu
irem
ents
Sup
ple
men
tary
info
rmat
ion
2.0
Com
mis
sion
ing:
ai
r fl o
w
bal
anci
ng
an
d
mea
sure
men
t
Air
fl o
w b
alan
cin
ga.
Th
e sy
stem
shou
ld b
e ba
lanc
ed to
ens
ure
that
des
ign
air fl
ow
rate
s are
ac
hiev
ed a
t eac
h ro
om te
rmin
al/g
rille
. As t
here
are
seve
ral c
ombi
natio
ns
of ro
om te
rmin
al/g
rille
and
fan
cont
rol t
hat m
ay b
e us
ed in
dom
estic
sy
stem
s, th
e fa
n m
anuf
actu
rer’s
inst
ruct
ions
shou
ld b
e fo
llow
ed to
ach
ieve
ba
lanc
ing.
If sp
ecifi
c de
tails
are
not
incl
uded
the
follo
win
g pr
oced
ure
shou
ld
be a
dopt
ed:
i. A
dju
stab
le te
rmin
als
and
a fi
xed
(ste
pp
ed) s
pee
d fa
n.
Th
e fa
n sp
eed
shou
ld b
e se
t to
achi
eve
the
desi
red
cont
inuo
us fl
ow ra
te.
The
inde
x te
rmin
al fl
ow ra
te is
set t
o fu
lly o
pen
and
all o
ther
term
inal
s ar
e ad
just
ed to
ach
ieve
the
requ
ired
fl ow
s at e
ach
term
inal
.If
the
tota
l fl o
w ra
te c
anno
t be
achi
eved
thro
ugh
all t
he te
rmin
als t
hen
the
fan
spee
d sh
ould
be
incr
ease
d.
If al
l the
term
inal
s hav
e to
be
clos
ed si
gnifi
cant
ly to
ach
ieve
onl
y th
e re
quire
d ai
r fl o
w ra
te th
en re
duce
the
fan
spee
d an
d re
bala
nce
the
term
inal
s.ii.
A
dju
stab
le te
rmin
als
and
co
ntr
olla
ble
sp
eed
fan
.
The
fan
spee
d sh
ould
be
set a
ppro
xim
atel
y to
ach
ieve
the
desi
red
cont
inuo
us fl
ow ra
te.
The
inde
x te
rmin
al fl
ow ra
te is
set w
ith th
e te
rmin
al fu
lly o
pen
and
all o
ther
term
inal
s are
adj
uste
d to
ach
ieve
the
requ
ired
fl ow
s at e
ach
term
inal
.If
the
inde
x te
rmin
al h
as to
be
clos
ed to
ach
ieve
onl
y th
e re
quire
d ai
r fl o
w ra
te, t
hen
redu
ce th
e fa
n sp
eed
and
reba
lanc
e th
e te
rmin
als.
No
te: T
his
is th
e ap
pro
ved
pro
ced
ure
fo
r co
mm
issi
on
ing
as
req
uir
ed b
y th
e B
uild
ing
Reg
ula
tio
ns.
The
inde
x te
rmin
al/g
rille
can
be
assu
med
to
be th
e te
rmin
al fu
rthe
st fr
om th
e fa
n un
it.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
50 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 8
: Sys
tem
4 in
spec
tio
n, t
esti
ng
an
d c
om
mis
sio
nin
g (c
on
tin
ued
)
Min
imu
m re
qu
irem
ents
Sup
ple
men
tary
info
rmat
ion
2.0
Com
mis
sion
ing:
ai
r fl o
w
bal
anci
ng
an
d
mea
sure
men
t (c
on
tin
ued
)
iii.
Fixe
d te
rmin
als
wit
h fl
ow
ad
just
men
t by
du
ct d
amp
er o
r sim
ilar
dev
ice
at th
e fa
n u
nit
.A
s i. o
r ii.
abov
e de
pend
ing
on th
e ty
pe o
f fan
spee
d co
ntro
l.iv
. A
dju
stab
le te
rmin
als
and
fi xe
d v
olu
me
fl o
w fa
n.
Th
e fa
n sp
eed
shou
ld b
e se
t to
achi
eve
the
desi
red
cont
inuo
us fl
ow ra
te.
The
inde
x te
rmin
al fl
ow ra
te is
set w
ith th
e te
rmin
al fu
lly o
pen
and
all o
ther
term
inal
s are
adj
uste
d to
ach
ieve
the
requ
ired
fl ow
s at e
ach
term
inal
. Adj
ustm
ent o
f the
term
inal
s ach
ieve
s bal
anci
ng o
nly;
tota
l fl o
w ra
te is
gov
erne
d by
the
fan
cont
rol s
ettin
g. G
reat
car
e sh
ould
be
take
n no
t to
clos
e th
e te
rmin
als t
oo fa
r as t
he fa
n un
it w
ill a
lway
s m
aint
ain
a co
nsta
nt v
olum
etric
fl ow
rate
; clo
sing
the
term
inal
s will
onl
y re
quire
the
fan
to w
ork
hard
er to
ach
ieve
a g
iven
air
fl ow
rate
.v.
Fi
xed
term
inal
s w
ith
au
tom
atic
fl o
w a
dju
stm
ent a
t th
e fa
n u
nit
.
The
fan
spee
d sh
ould
be
set t
o ac
hiev
e th
e de
sire
d co
ntin
uous
fl ow
rate
.Th
e fl o
ws a
re b
alan
ced
by a
utom
atic
dev
ices
loca
ted
with
in th
e fa
n un
it,
and
no a
djus
tmen
t can
be
mad
e.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
Section 3 Continuous mechanical ventilation systems | 51
Tab
le 8
: Sys
tem
4 in
spec
tio
n, t
esti
ng
an
d c
om
mis
sio
nin
g (c
on
tin
ued
)
Min
imu
m re
qu
irem
ents
Sup
ple
men
tary
info
rmat
ion
2.0
Com
mis
sion
ing:
ai
r fl o
w
bal
anci
ng
an
d
mea
sure
men
t (c
on
tin
ued
)
Air
fl o
w m
easu
rem
ents
a.
Ensu
re a
ll in
tern
al a
nd e
xter
nal d
oors
and
win
dow
s are
clo
sed,
incl
udin
g ro
oms i
n w
hich
mea
sure
men
ts a
re b
eing
car
ried
out.
b.
Air
fl ow
mea
sure
men
ts sh
ould
be
perf
orm
ed u
sing
a c
alib
rate
d ai
r fl o
w
devi
ce w
ith p
ropr
ieta
ry h
ood
atta
chm
ent a
nd re
sults
reco
rded
in li
tres
per
se
cond
(l/s
). Re
fere
nce
shou
ld b
e m
ade
to d
esig
n ai
r fl o
w ra
tes.
c.
Reco
rd th
e ai
r fl o
w ra
te a
t eac
h ro
om te
rmin
al o
n th
e co
mm
issi
onin
g sh
eet i
n Se
ctio
n 5,
alo
ng w
ith th
e de
sign
air
fl ow
rate
for e
ach
term
inal
. M
easu
rem
ents
shou
ld b
e ta
ken
at b
oth
max
imum
rate
and
min
imum
rate
fa
n sp
eeds
.d.
It
is re
com
men
ded
that
a v
ane
anem
omet
er o
r sim
ilar d
evic
e is
use
d to
bal
ance
and
mea
sure
the
air fl
ow
rate
s at e
ach
room
term
inal
. The
in
stru
men
t will
requ
ire a
hoo
d to
be
atta
ched
to a
llow
it to
cov
er th
e te
rmin
al.
e.
The
inst
rum
ent s
houl
d be
cal
ibra
ted
annu
ally
and
be
capa
ble
of a
chie
ving
an
acc
urac
y of
± 5
per
cen
t.A
dd
itio
nal
no
tes
for S
RH
RVa.
Th
e su
pply
and
ext
ract
con
fi gur
atio
n of
som
e fa
n un
its m
ay p
reve
nt
mea
sure
men
t of t
he a
ir fl o
w ra
tes.
In su
ch c
ases
, if t
he m
anuf
actu
rer’s
in
stal
latio
n in
stru
ctio
ns h
ave
been
follo
wed
the
air fl
ow
rate
s spe
cifi e
d fo
r th
at p
rodu
ct m
ust b
e as
sum
ed to
hav
e be
en a
chie
ved.
No
te: T
his
is th
e ap
pro
ved
p
roce
du
re fo
r air
fl o
w
mea
sure
men
t as
req
uir
ed b
y th
e B
uild
ing
Reg
ula
tio
ns.
Cal
ibra
tion
of m
easu
rem
ent
equi
pmen
t sho
uld
be u
nder
take
n an
nual
ly b
y re
turn
ing
the
inst
rum
ent
to a
UK
AS
accr
edite
d ca
libra
tion
cent
re.
O N L I N E V E R S I O N
O N L I N E V E R S I O N
52 | Domestic Ventilation Compliance Guide: 2010 Edition
Tab
le 8
: Sys
tem
4 in
spec
tio
n, t
esti
ng
an
d c
om
mis
sio
nin
g (c
on
tin
ued
)
Rec
om
men
ded
min
imu
m re
qu
irem
ents
Sup
ple
men
tary
info
rmat
ion
3.0
Co
ntr
ols
Inst
alla
tio
na.
En
sure
all
loca
l con
trol
s hav
e be
en in
stal
led
follo
win
g th
e m
anuf
actu
rer’s
in
stru
ctio
ns.
b.
Ensu
re a
ll lo
cal c
ontr
ols a
re a
dequ
atel
y la
belle
d, in
dica
ting
thei
r fun
ctio
n cl
early
.c.
If
sens
ors h
ave
been
inst
alle
d se
para
tely
from
the
fan
unit,
ens
ure
the
inst
alla
tion
follo
ws t
he m
anuf
actu
rer’s
inst
ruct
ions
.d.
W
here
con
trol
of t
he fa
n is
aut
omat
ed, t
he c
ontr
ols s
houl
d be
con
fi gur
ed to
m
inim
ise
the
occu
rren
ce o
f hun
ting.
e.
If m
anua
l con
trol
of,
for e
xam
ple,
hea
t exc
hang
er b
y-pa
ss is
pro
vide
d, c
lear
an
d de
taile
d in
stru
ctio
ns sh
ould
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aila
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cupi
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If hu
ntin
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ntin
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ncre
ase
and
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or t
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As f
ar a
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Section 4 System completion and handover | 53
Section 4
System completion and handover
This section outlines the recommended minimum information to be handed over to the end user immediately after the ventilation system has been installed, tested and commissioned, as appropriate to the system type.
4.1 Documentation to be handed over to the end user
Operation and maintenance manualThe operation and maintenance manual should contain specifi c instructions for the end user on how and when to use the ventilation system, including information on the intended use of available fan settings. Information should also be provided to suggest when the system components should be cleaned and maintained.
The following information should be provided where relevant:
• design statement that sets out the key characteristics of the system provided along with specifi c, non-technical information on how and when the system should be used
• manufacturer’s contact details
• use of air inlets for background ventilation
• location of and setting automatic controls (e.g. humidity and timer controls)
• location and use of on/off and boost settings for mechanical ventilation system
• adjustable extract air terminals on vertical PSV ducts
• instructions on how cleaning and maintenance should be carried out, including replacing fi lters
• location of fi lters if not installed within the fan unit
• if there are no fi lters on extract terminals, how ducts can be accessed for cleaning, and recommendations on how and when cleaning should be undertaken
• recalibration or checking of sensors and their location.
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54 | Domestic Ventilation Compliance Guide: 2010 Edition
The operation and maintenance manual should also contain relevant manufacturers’ literature which was supplied with the system or with individual components of the system. This might include component specifi cations, installation guidance, operating instructions, maintenance schedules, guarantees, registration card, spare part lists, means of obtaining spare parts, etc.
Completion of inspection checklist and air fl ow measurement test sheetThe three-part sheet detailed in Section 5 should be signed and completed and included in the Operation and Maintenance manual.
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Section 5 Inspection checklist and air fl ow measurement test sheet | 55
Section 5
Inspection checklist and air fl ow measurement test sheet
This inspection checklist and air fl ow measurement test sheet is divided into three parts:
• Part 1 is for recording the particulars of the system, the installation address and the installer’s details.
• Part 2a functions as an installation checklist.
• Part 2b is for recording the results of a visual inspection of the installation, and also acts as a pre-test checklist.
• Part 3 is the approved manner for recording the results of mandatory air fl ow tests on both intermittent and continuous mechanical ventilation systems in new dwellings, and is the sheet that must be given to the building control body (BCB).
The three parts should be completed in full, and a copy should form part of the Operation and Maintenance manual.
5.1 Checking design against measured air fl ow rates
For Systems 1, 3 and 4, the measured air fl ow rates should be recorded on Part 3: Air fl ow measurement test details, as part of the testing and commissioning procedures given in Tables 2, 6 and 8. The measured values will need to be compared with their respective design values. Compliance with the design will be met if the measured air fl ow rates for each are equal to, or greater than the design value. If any measured value is less than the design value, adjustment should be made to correct the system and all air fl ows re-measured until they meet the design values. If it is not possible to make adjustment to increase the air fl ow rate then a note to this effect should be made on the sheet. This may require the person with overall responsibility for the system to carry out remedial works to rectify the cause of the under-performance. The system will need to be re-tested to confi rm that the design values have been met.
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56 | Domestic Ventilation Compliance Guide: 2010 Edition
5.2 Instrument calibration
Measurement of air fl ows should be performed using equipment that has been calibrated at a UKAS accredited calibration centre. Calibration should be performed annually for each air fl ow measurement device used to record fi nal air fl ow rates in Part 3.
5.3 Demonstrating compliance
All three parts of the checklist and test sheet should be completed, with the relevant Parts 2 and 3 signed by a person who is responsible for the inspection and testing of the system that has been installed.
The three-part form needs to be completed for each installation address, and as a minimum a copy of Part 3 should be submitted to the BCB as evidence the installation has been correctly tested and commissioned (as relevant to the system installed).
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Section 5 Inspection checklist and air fl ow measurement test sheet | 57
Part 1 – System details and declarations
1.1 Installation Address Details
Dwelling name/number
Street
Locality
Town
County
Post Code
1.2 Installation Details
System classifi cation* System ......
Enter System 1 to 4 as defi ned by Approved Document F 2010
Manufacturer
Model numbers
Serial number (where available)
Location of fan units 1.
2.
3.
4.
5.
*Note. If a system has been installed that is not defi ned by Systems 1 to 4 in Approved Document F, further installation checks and commissioning procedures may be required. Seek particular guidance from the manufacturer for these systems.
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Part 2a – Installation details
2.1 Installation Checklist – General (all Systems) Tick as appropriate
Has the system been installed in accordance with manufacturer’s requirements?
Yes No
Have relevant system installation clauses been followed as detailed in Tables 1, 3, 5, and 7 as applicable?
Yes No
Type of ductwork installed (e.g. rigid, semi-rigid)
If any deviation from Tables 1, 3, 5 and 7, these should be detailed here
Description of installed controls (e.g. timer, central control, humidistat, PIR, etc)
Location of manual/override controls
2.2 Installation Engineer’s Details
Name
Company
Address Line 1
Address Line 2
Telephone Number
Post Code
Signature
Competent Person Scheme/ Registration Number (if applicable)
Date of Installation (completion)
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Section 5 Inspection checklist and air fl ow measurement test sheet | 59
Part 2b – Inspection of installationThis section should be completed before completing Part 3.
2.3a Visual Inspections – General (all Systems)
Total installed equivalent area of background ventilators in dwelling?
mm
Total fl oor area of dwelling? m2
Does the total installed equivalent ventilator area meet the requirements given in Tables 5.2a, 5.2b, or 5.2c in ADF?
Yes No
Have all background ventilators been left in the open position? Yes No
Have the correct number and location of extract fans/terminals been installed that satisfy Table 5.2a in ADF?
Yes No
Is the installation complete with no obvious defects present? Yes No
Do all internal doors have suffi cient undercut to allow air transfer between rooms (i.e. 10 mm over and above fi nal fl oor fi nish)?
Yes No
Has all protection/packaging been removed (including from background ventilators) such that system is fully functional?
Yes No
For ducted systems, has the ductwork installation been installed in such manner that air resistance and leakage is kept to a minimum?
Yes No
Are the correct number and size of background ventilators provided that satisfy ADF?
Yes No
Has the entire system been installed such that there is suffi cient access for routine maintenance and repair/replacement of components?
Yes No
2.3b Visual Inspections – General (Systems 3 and 4 only)
Have appropriate air terminal devices been installed to allow system balance?
Yes No
Has the heat recovery unit (System 4 only) and all ductwork been effectively insulated where installed in unheated spaces?
Yes No
Condensate connection is complete and drains to an appropriate location (System 4 only)?
Yes No
2.3c Other Inspections – General (Systems 1, 3 and 4 only)
Upon initial start up, was any abnormal sound or vibration experienced, or unusual smells detected?
Yes No
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2.3d Inspector’s Details
Name
Company
Address Line 1
Address Line 2
Telephone Number
Post Code
Signature
Competent Person Scheme/ Registration Number (if applicable)
Date of Inspection (completion)
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Section 5 Inspection checklist and air fl ow measurement test sheet | 61
Part 3 – Air fl ow measurement test and commissioning details
3.1 Test Equipment
Schedule of air fl ow measurement equipment used (model and serial number)
Date of last UKAS calibration
1.
2.
3.
3.2 Air Flow Measurements – System 1 only
Fan Reference (as 1.2)
Measured Extract Rate (l/s) Design Extract Rate (l/s) Refer to Table 5.1a in ADF
Extract Fan 1
Extract Fan 2
Extract Fan 3
Extract Fan 4
Extract Fan 5
For kitchen extract canopies, only the highest setting needs to be recorded.
3.3 Air Flow Measurements (Extract) – Systems 3 and 4 only
Room Reference (location of terminals)
Measured Air FlowHigh Rate (l/s)
Design Air FlowHigh Rate (l/s)
Measured Air FlowLow Rate (l/s)
Design Air FlowLow Rate (l/s)
Kitchen
Bathroom
En Suite
Utility
Other...
Other...
Other...
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3.4 Air Flow Measurements (Supply) – System 4 only
Room Reference (location of terminals)
Measured Air FlowHigh Rate (l/s)
Design Air FlowHigh Rate (l/s)
Measured Air FlowLow Rate (l/s)
Design Air FlowLow Rate (l/s)
Living Room 1
Living Room 2 (if present)
Dining Room
Bedroom 1
Bedroom 2
Bedroom 3
Bedroom 4
Bedroom 5
Study
Other...
3.5 Commissioning – Systems 3 and 4 only
Have controls been set-up in accordance with the manufacturer’s recommendations?
Yes No
Have all distribution grilles been locked to prevent unauthorised adjustment?
Yes No
3.6 Test Engineer’s Details
Name
Company
Address Line 1
Address Line 2
Telephone Number
Post Code
Signature
Competent Person Scheme/Registration Number (if applicable)
Date of Test
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