bb catalogue june 2013

Catalogue

version 3.1

Breathing Buildings is the UK’s leading low energy ventilation company – a spinout from Cambridge University that is changing the world of natural ventilation.

Contents

01Breathing Buildings | Catalogue

Breathing Buildings

04 What is Natural Ventilation

05 Why Use Natural Ventilation

07 The Breathing Buildings Difference

08 Smart Ventilation Systems

Other System Components

48 Phase Change Material

51 Window Actuation

52 Dampers

53 Natural Ventilation without Mixing

53 Natural Ventilation with Cooling

New Products

54 FX Series

55 NVHR - Natural Ventilation and Heat Recovery

Systems overview

R Series

13 Product Information

14 Dimensions

15 Performance & Installation

16 Terminations

18 Controls & Interface

18 System Schematic & Wiring

19 Natural Ventilation Delivered

S Series


22 Dimensions


24 Terminations



30 Thermal Modelling

A Series


36 Dimensions

37 Installation



F Series


44 Dimensions




Summer StrategyUpwards Displacement Ventilation

Winter StrategyMixing Ventilation

0302

Breathing Buildings

Breathing Buildings is the UK’s leading low energy ventilation company – a spinout from Cambridge University that is changing the world of natural ventilation

Use Our Services

If you are interested in creating a low energy building then we are ideally placed to assist you with the ventilation strategy for your project. Our website provides an array of information including a design tool which can be used to get started on the design of the ventilation system for certain room types.

Our engineers also provide assistance and our first consultation visit is free of charge. If the project is relatively straightforward then we may suggest a range of options during the meeting and then work with the project team to develop the scheme further. We also offer site visits to existing installations so that clients can see our systems in operation and talk to the end-users.

If the building is more complex then we might suggest that in-depth modelling is required, in which case we will discuss how to work as part of the design team to develop the optimal low energy ventilation strategy.

Innovation

Our research and development is on-going. Whilst the e-stack system is ideal for certain building types in the UK climate, there are further opportunities to reduce the energy consumption of the built environment by integrating our system with other building technologies and extending the range of building types and climate zones in which our product can operate.

We have developed an integrated heating control system which is now installed in a number of buildings. We also collaborate with the University of Cambridge’s Undergraduate Research projects. Our research and development team continue to work on a number of fascinating projects with new product launches planned.

Awards

Breathing Buildings Ltd. Registered in England and Wales. Registered Office: The Courtyard, 15 Sturton Street, Cambridge, CB1 2SN. Registered No. 05676785

For more information01223 450060 [email protected] www.breathingbuildings.com

What We Do For Our Clients

Our mission is simpleWe aim to help clients create the lowest energy building possible with minimum associated CO2 emissions and capital cost, whilst providing appropriate levels of ventilation and thermal comfort at all times of the year.

Design consultingWe have a wealth of experience and unique airflow modelling capabilities which enable us to devise the most appropriate natural or hybrid ventilation strategies for any building. We offer design consulting services as part of a building design team.

Natural Ventilation productsThe natural ventilation product range which we supply includes the e-stack system as well as standard dampers and louvres. The systems are ideally suited to a variety of building types including school classrooms, halls, offices, theatres, healthcare and retail buildings.

Our Customers and Partners

Breathing Buildings’ customer base is varied: already e-stack ventilation systems are operating in over 80 different schools in the UK, as well as theatres, halls and supermarkets. The team also has design experience in more than 50 buildings across auditoria, shopping centres, multi-storey offices and apartment buildings.

We work closely with partners which enables us to offer complementary sustainable building technologies and hybrid solutions where necessary. Our partners include Modcell (carbon negative straw bale construction panels), Mitsubishi (provider of air conditioning systems) and Price Industries who are providing e-stack products in North America.

Installation and After Sales Support

We offer a turnkey solution for our clients, including design support, control system integration, installation, final inspection, service agreements and on-going monitoring. We will work with you from start to finish to ensure a successful project.

A research programme at the university created a new concept for ventilation that combines the principles of natural mixing ventilation in winter and natural upward displacement ventilation in summer. This was patented in 2005 and the company was set up to develop an easy-to-install system derived from the patent, and to provide the resulting e-stack product range to the industry.

Breathing Buildings | Catalogue

0504

What is Natural Ventilation Why Use Natural Ventilation

Natural ventilation is the process of using natural air movement, caused by the effects of wind and buoyancy, to provide fresh air into buildings

The built environment accounts for around 45% of the energy consumption in developed countries

Naturally ventilated buildings use roughly 60% less energy than a traditional mechanically ventilated, air conditioned building. Naturally ventilated buildings are therefore typically more efficient than mechanically ventilated ones.

In order to reduce the burden on the energy supply system and to reduce carbon emissions, there is a drive to make buildings even more energy efficient.

Although switching from mechanical to natural ventilation is one way of achieving this, the UK is seeking even more savings. One of the potential savings identified is a reduction in heating requirements of buildings through improvements in the thermal envelope of buildings. Part L of the Building Regulations is changed around every four years, with requirements for lower U-values and more air-tight buildings, leading to lower heat losses and less infiltration. This makes complete sense especially

during periods of low or zero occupancy; for example it helps to reduce the pre-heat requirement on a cold winter morning. However, it also means that rooms need to be ventilated with a ventilation system during occupied hours in winter when occupants are unlikely to open windows.

In high summer, the improvements in building fabric can help protect the interior from the hot external air. This is particularly helpful when the interior is comprised of thermal mass which has been night-cooled. In this case a ventilation system is needed which provides purge ventilation at night and minimum ventilation during the day.

The net result of the changes to Building Regulations is that properly controlled airflow is required both in winter and summer. An intelligently controlled natural ventilation system is one of the key ingredients for a successful building.

Breathing Buildings has significant experience helping teams to design both simple buildings and complicated spaces.

By understanding these factors and sizing the system correctly we can design a natural ventilation system that provides appropriate air flow without the need for a mechanical system. Most building types are suitable for natural ventilation including homes, offices, schools, theatres and healthcare centres. More careful design is required when there are specific acoustic requirements.

This contrasts with mechanical ventilation which uses electrical energy to drive air into those spaces.

In its simplest form natural ventilation is opening windows to allow air into and out of a room. This solution might be appropriate if the requirements are simply “some” fresh air in the immediate proximity of the window. However, there are many other factors which need to be addressed by natural ventilation systems; these include:

Thermal comfort - avoiding cold draughts in colder weather and preventing overheating in hotter conditions.

Energy use - minimizing heating energy in winter and any energy used by supplemental cooling systems (if present) in summer.

Air distribution - designing the location of vents so that air flows are distributed throughout the occupied zones.

Temperature stratification - designing the natural ventilation system to maximise the benefits of vertical stratification in both summer and winter.

Heat gains and occupancy - incorporating a control system which enables the natural ventilation system to respond to changes in occupancy and heat gain.

We do not leave you once our systems are installed, unlike others in our industry


07

The Breathing Buildings philosophy of natural ventilation stems from pioneering research at Cambridge University

The research at Cambridge identified a paradox with ventilation - many naturally ventilated buildings were found to use more energy than mechanically ventilated ones! This was solved by developing a new approach to natural ventilation which is now completely changing the industry.

The traditional method of naturally ventilating a building was to bring air in at one location and to exhaust it from another. In winter, the problem of cold draughts was overcome by pre-heating the air with a radiator or other such device. However, in modern well insulated buildings, if the cold fresh air has been pre-heated to 16˚C by a radiator then the space becomes incredibly hot if the ventilation rate is limited to the minimum required in terms of CO2 levels. This results in spaces being over-ventilated, and therefore the radiators emitting more heat to pre-heat higher quantities of cold air.

This conundrum was solved by treating the heat gains in the space as a benefit to be used rather than a problem. A new method of naturally ventilating a building in winter was devised which requires the incoming cold fresh air to be mixed with warm room air before it reaches occupants. With this winter mixing natural ventilation strategy, the heat gains in the space are used to effectively pre-heat the air and the heating bills for naturally ventilated buildings can be reduced dramatically; by 50% over the whole year.

In warmer weather, when cold draughts are no longer a problem, the strategy reverts back to the conventional displacement natural ventilation concept. If openings are available at lower level then these are used as the inflow and the higher level vents provide the exhaust.

The patented system developed by Breathing Buildings which utilises the pioneering concept is called the e-stack. In order to quantify the energy savings of the e-stack system, in-depth IES modelling has been undertaken to compare the performance of various ventilation strategies.

The poorest system in terms of energy use is in fact the traditional opening window or low level damper with integrated heating element. The amount of heating

energy expended in overcoming the cold draught problem is simply heinous! The excessive heating energy use by this type of system has now resulted in the regulations for new schools in the UK Priority Schools Building Programme stating that fresh air must be pre-mixed in winter.

The next best option is the use of mechanical ventilation with heat recovery (MVHR) in colder weather and in bypass mode in warmer weather. If opening windows are available, then the mechanical ventilation system is only used in colder weather and opening windows are used in warmer weather. However, both of these options use a considerable amount of electricity through the use of fans driving the flow.

The lowest energy solution is the e-stack system. The heating energy use (denoted by the red portion on the bar chart) is marginally higher than with MVHR, but the fan power is considerably lower. This is because the fans within the e-stack system are used for mixing rather than driving the flow through ducts and mixing is a much lower energy process.


Winter mixing uses the heat gains in the space to pre-heat the air,

06

The Breathing Buildings Difference

dramatically reducing heating bills by up to 50% over a year

R Series S Series Atrium Series

0908

Smart Ventilation Systems

Smart design is important but we want to change the world of ventilation andwe have the product range to help you

01 02 03 Facade Series04

01

02

03

04


1110

Systems Overview

R Series01

02

03

04

05

The R Series unit is a ceiling mounted unit that has been designed to ventilate a room with occupancies from 10 to 35 people. The split shaft provides inflow and outflow in winter and can combine with opening windows in the summer to

create a stack effect. Integrated fans mitigate cold draughts in a low energy way delivering appropriate ventilation and superb thermal comfort as well as providing fan boost and night cool functionality.

S Series

Atrium Series

Facade Series

Terminals

The S Series unit is a ceiling mounted unit that comes in 3 sizes S1500, S1200 and S1000. The S1500 has been designed to ventilate a room with occupancies from 35 to 100 people, the S1200 for spaces with occupancies of 15 to 35.

S1000 units are suitable for spaces with lower heat gains or when operating as multiple units. For larger spaces multiple S Series units are installed and can be controlled independently or in zones. The split shaft provides inflow and outflow in winter and can combine with opening windows or dampers in

the summer when available to create a stack effect. Integrated fans mitigate cold draughts in a low energy way delivering appropriate ventilation and superb thermal comfort as well as providing fan boost and night cool functionality.

When vents or windows are located at the top of atria in multi-storey buildings then these can be used for in- and out-flow in colder weather. When the atrium is warmer than the outside then air will come in and out of the high level windows if all

other doors and windows lower in the building are closed. Unlike a classroom situation, the air which enters through high level windows in an atrium can fall 10+ metres before reaching occupants. The descending plumes of relatively cold, dense air can therefore entrain sufficient atrium air before reaching occupants so that cold draughts are avoided naturally.

The F Series is designed for a standard school classroom with an elevated facade. If there is a clerestory window concept as indicated in the figure shown then the unit will operate in single

sided mixing ventilation mode in winter and in displacement cross-flow ventilation in summer. Without an elevated facade the F500 units or our new FX units operate as a pair to provide ventilation.


13

The R Series is our most popular unit. Designed for a space the size of a standard school classroom, ventilation is provided through a split shaft giving access to the roof

The R Series unit is a ceiling mounted unit that has been designed to...

12

R Series

Product Information

Features• Low energy mixing fans to mitigate against cold draughts in winter

• Summer exhaust boost mode

• Night cooling

• Insulated volume control damper with spring return ensures appropriate ventilation rates

• Internal temperature sensor with integrated CO

2 sensor

• External temperature sensor

• Integral control responds to environmental conditions

• Traffic light indicator panel for window opening

• Mill finish pre-galvanised steel

• Ready fitted mounting brackets

• Three choices of mixed air delivery direction

• Key switch for automatic operation; test

• Combined internal temperature and CO2 sensor

Options• Penthouse louvre or mushroom terminal

• Integrated noise attenuation unit offering 25dB for noisy sites, more available on request

• Patented heating control strategy ensures minimum energy use

• Control signal for automated actuation of low level windows or dampers

• Modbus link for integration into wider Building Management Systems (BMS)

• Eggcrate grilles

Air Flow Strategies

Summer ModeWhen it is warm outside the system operates in upflow displacement mode, using the stack effect to achieve highair flow rates and keep the room at a pleasant temperature.

Fan boost and night cooling modes offer greater thermal comfort in exceptional summer conditions.

Winter ModeWhen the outside temperature becomes too low to bring directly onto the occupants the R Series unit operates as inflow and outflow. The fans in the unit pre-mix the incoming air with air from within the room, preventing the need for wasteful pre-heating.

The split shaft provides inflow and outflow in winter and combines with opening windows in the summer to create a stack effect. Integrated fans mitigate cold draughts in a low energy way delivering appropriate ventilation and superb thermal comfort with fan boost and night cooling as standard.

ventilate a room with occupancies from 10-35 people.


1514

R Series Dimensioned Drawing Performance Installation

The R Series comes with fixing brackets.

The e-stack unit can be hung from 4 no. pieces of M10 studding of maximum length 1200mm.

The unit can be lifted into place and four M10 Studding (drop-rods) are brought through the holes on the end of the brackets, positioned and secured in place using a pair of M10 full nuts per bracket.

Alternatively a cradle can be formed from a unistrut channel, with vertical support studding attaching to either side of the cradle on which sits the e-stack unit.

Dimensions

H 500 mm

D 950 mm

W 1,600 mm

Weight 110 Kg

Physical area 0.75 m2

Effective Area (A*) 0.6 m2

Finish Mill (RAL at additional cost)

Electrical

Power Rating 0.1 kW

Voltage 230V AC (+- 10%)

Full load current 0.5A

Short Circuit Rating N/A - Control only

Earth Leakage <3.5 mA

www.breathingbuildings.com/downloads

Acoustic performance Sound Power (dB) Overall Ambient

Frequency Band (Hz) 63 125 250 500 1k 2k 4k 8k dB (A) dB (A)#

Winter Slow 41 47 38 35 30 26 18* 24* 36.8 32.8

Winter Fast 44 50 41 38 34 28 18* 24* 39.6 34.4

Summer Boost 44 46 42 40 37 29 18* 24* 39.1 35.0

* denotes results at background

# Ambient sound pressure in typical classroom for BB93

U-Value

Part L2a requirement 3.5 (W/m2 K)

R Series 3.4 (W/m2 K)

Damper section <0.8 (W/m2 K)

Damper air leakage

Part L2a requirement 10 m3/h/m2

R Series 2.9 m3/h/m2

Tested at 50 Pa across whole damper unit

Conformity

CE marking Yes

BB93 (standard room) Yes

Mixed air temperatures at the occupied zone

Internal Temperature

Ext

ern

al T

emp 21 22 23 24 25

10 19.5 20.0 20.5 21.0 21.5

12 18.5 19.0 19.5 20.0 20.5

10 17.5 18.0 18.5 19.0 19.5

4 14.5 15.0 15.5 16.0 16.5

Based on fresh air flow rate of 150 l/s, 30 people at 5 litres/person/s

R Series continued

R & S-Series Unit (10 amp supply)

D

Traffic Lights Red / Blue

T

T°C

+CO2

L

T°C

External

External Temperature

E

Combined Room Temp/CO2 sensors

Secret Auto / Test Switch with rocker switch override

W

LED Panel

Mains Fused Un-switched

connection Unit

F

Fire Healthy Signal

Two Port Radiator Valve

M

Modbus

T-Piece Provided by Breathing Buildings

M

E-Stack network

M

R1

R2

Wall Damper

Window Actuator

Optional

Optional

Optional

Optional

Y

P

Optional

500

500

500

ACTUATOR COVER

(A) SIDE

(C) SIDE

(B) SIDE

C L

CL

CL

CONTROLBOX

FAN

C

A

B

ADDITIONAL COST

COST

ORDERING

BE USED

CONTROL BOX LOCATION DO NOT DRILL THROUGH THIS AREA - ACCESS FOR CABLES TO LEFT-SIDE OF SPACE ENVELOPE (500X500)


1716

R Series continued

R Series Terminations Installation Penthouse Louvre Dimensioned Drawing

Mushroom TerminalShaft

Breathing Buildings offer two roof terminations, the penthouse louvre or the mushroom.

The penthouse louvre is the most common type of terminal and is frequently associated with a natural ventilation system. We offer a double bladed system as standard which offers class A weather performance with a triple bladed system for sites where better weather performance is required. The standard terminal comes in RAL 7035 (Light Grey) with corner posts and gabled roof but other options and sizes are available.

The mushroom terminal is an unobtrusive alternative to the traditional bladed metal louvre and has better noise attenuation properties. The terminal is RAL 7035 (Light Grey) as standard but other colours are available on request.

Both terminals offer optional acoustic attenuation.

A weathered builders curb around the perimeter of the roof penetration and shaft to the e-stack supports the roof termination which is usually a minimum height of 150mm above the finish roof surface. Once in place the roof terminal is fixed to the curb using self tapping screws at a maximum separation of 500mm. Once installed a bead of mastic or similar is laid around the perimeter of the overcurb.

An insulated shaft needs to be constructed by others between the bottom of the roof termination and the R series indoor unit. A rubber seal is provided on the top of the e-stack indoor unit to ensure air tightness with the bottom edge of the shaft. Breathing Buildings has no preference as to the material of the shaft. Previous examples have utilised the concrete soffit, plywood, plasterboard, and ductwork. This is sized to fit the damper (1550mm x 900mm). The terminal height is pre-fitted with a divider.

The shaft is to be divided into two pathways vertically for separation of inflow and outflow. Usually this is constructed from either plywood, plasterboard or galvanised steel etc. and does not require insulation. Note that the split is not equal, with the larger section above the e-stack fan.

The vertical divider extends from just above the dampers (typ. 25mm above) on top of the e-stack unit to the underside of the acoustic attenuator or the penthouse louvre roof terminal.

Physical properties

Typical weight 180 Kg

Finish standard RAL 7035

Finish options Standard RAL

Lifting points Eyes supplied on request

Standard attenuation 5 dB

Optional attenuation 25 dB

Shaft dimensions

W 1550 mm

D 900 mm

Weather performance

Double blade Triple blade

Performance Class A up to 1 m/s airflow face velocity

Class A up to 2 m/s airflow face velocity

Physical properties

Height (Inc. base) 945 mm

Curb dimensions 1850 (l) x 1200 (w) x 150 (h)




Lifting points Eyes supplied on request


Optional attenuation 21 - 28 dB

Shaft dimensions

W 1550 mm

D 900 mm

Test involves simulated rainfall of 75l/h at a wind speed of 13m/s (29 mph). Full BSRIA weather performance test data available on request

Weather performance

Water testing has been carried out at the BRE using test method prEN 15601—Hygrothermal performance of buildings—resistance to wind driven rain coverings with discontinuously laid small elements. The terminal was subject to 75mm/hr/m2 at a driving wind speed of 30mph (13.4 m/s). Water ingress during the tests was too small to measure in meaningful terms.


1918

R Series continued

R Series Control and Interface

System Schematic and Wiring

Natural Ventilation Delivered

The R Series units have an integral control panel which provides power for the e-stack fans and damper and interfaces to the ancillary components e.g. sensors, switches, etc. The control panel does not have any controlling elements which are serviceable to the user. Power is provided by others. The sensors are wired to the units by others using 4 core, screen cabling such as CY Cable or Trend Cable TP/2/2/22/HF/200.

The units have an optional interface with a building management system (BMS) using a series of pre-defined modbus points.

Breathing Buildings e-stack systems do not form part of a fire strategy. However, e-stacks are able to react to a fire condition to close the damper and stop fans if a fire interface is desired and agreed with Building Control.

Winter supplyIn winter ventilation it is important to balance the ventilation requirements with heating and thermal comfort. As you can see from chart 01 even when the outside temperature is below 5°C we are able to successfully mitigate cold draughts, the supply temperature remaining at a comfortable level.

Chart 02 looks at the daily average CO2 levels in the space during the winter months, which BB101 requires to be below a daily average of 1,500ppm.

Summer supplyIn summer ventilation the primary concern with BB101 is ensuring that the ventilation rates are adequate to prevent the rooms from overheating. Using our e-stack units we are able to achieve this even when the outside temperature climbs above 30°C. (Chart 03).

Chart 04 looks at the daily average CO2 levels in the space during the summer months, which confirms that average remained below the BB101 requirement of 1,500ppm.

Close Window Open Window

onoff

test

R Series unit

13A Double Pole Switched Fused Connection Unit (FCU) for complete isolation

External temperature sensor

Room temperature and CO2 sensor

4-core CY cable

5-core CY cable

4-core YY cable

4-core YY cable

LED Interface

Key switch

We are proud of our understanding of natural ventilation and our ability to deliver low energy buildings with great internal environments. We have monitored several installations to make sure that they are ventilating properly and mitigating cold draughts. These charts show data from Linton Village College where we installed e-stack, roof based units

-5

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25

30

22/11/201022/11/201023/11/201023/11/201024/11/201024/11/201025/11/201025/11/201026/11/201026/11/201027/11/2010

Tem

pera

ture

[o C]

External temperature

Room temperature

Supply temperature

f 22/11/2010 23/11/2010 24/11/2010 25/11/2011 26/11/2010

-5

0

5

10

15

20

25

30

05/07/10 06/07/10 07/07/10 08/07/10 09/07/10 10/07/10

Tem

pera

ture

(o C)

Summer

External temperature

Room temperature

f 28/06/2010 29/06/2010 30/06/2010 01/07/2010 02/07/2010

0

10

20

30

40

50

60

70

80

90

100

600 700 800 900 1000 1100 1200 1300 1400 1500

Perc

enta

ge o

f day

s at o

r abo

ve a

giv

en C

O 2 lev

el (%

)

Daily occupied average CO2 level (ppm)

0

10

20

30

40

50

60

70

80

90

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600 700 800 900 1000 1100 1200 1300 1400 1500

Perc

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Daily occupied average CO2 (ppm)

02

03

01

04


21

The S Series is designed for larger spaces such as school halls, theatres or rooms with high occupancy. Ventilation is provided through a split shaft giving access to the roof

The S Series unit is a ceiling mounted unit that comes in 3 sizes S1500, S1200 and S1000.The S1500 has been designed to ventilate a room with occupancies from 35 to 100 people, the S1200 for spaces with occupancies of 15 to 35. S1000 units are suitable for spaces with lower heat gains or when operating as multiple units. For larger spaces multiple S Series units are installed and can be controlled independently or in zones.

20

S Series

Product Information



• Night cooling


• Internal temperature sensor with integrated CO2 sensor






• Three choices of mixed air delivery direction

• Key switch for automatic operation; test


Options• Low level control panel

• Penthouse louvre or mushroom terminal

• Integrated noise attenuation unit offering 25dB for noisy sites, more available on request





Air Flow Strategies

Summer ModeWhen it is warm outside the system operates in upflow displacement mode, using the stack effect to achieve high air flow rates and keep the room at a pleasant temperature.


Winter ModeWhen the outside temperature becomes too low to bring directly onto the occupants the S Series unit operates as inflow and outflow. The fans in the unit pre-mix the incoming air with air from within the room, preventing the need for wasteful pre-heating.

The split shaft provides inflow and outflow in winter and can combine with opening windows or dampers in the summer to create a stack effect. Integrated fans mitigate cold draughts in a low energy way delivering appropriate ventilation and superb thermal comfort as well as providing fan boost and night cool functionality.


2322

S1500 Dimensioned Drawing Performance Installation

The S Series comes with fixing brackets.

The e-stack unit can be hung from 4 no. pieces of M10 studding of maximum length 1200mm. The unit can be lifted into place and four M10 Studding (drop-rods) are brought through the holes on the end of the brackets, positioned and secured in place using a pair of M10 full nuts per bracket.


Dimensions

H 500 mm

D 1,575 mm

W 1,575 mm

Weight 168 Kg



Finish Galvanised (RAL at additional cost)

Electrical

Power Rating 0.1 kW








Winter Slow 41 42 39 38 34 24 18* 24* 38.7 31.7

Winter Fast 46 47 44 42 40 30 18* 24* 43.5 33.8

Summer Boost 41 41 40 40 38 28 18* 24* 41.1 32.6



S Series continued

630

400

1575 75147523

0

1425

400

395

mixed air delivery open both sides

C L15

75

CL 1649

188.

510

6.5CL 1753

C L15

20

14

1713.1

TOP VIEW

Removable electrical connection access box

15751475


RIGHT SIDE VIEW

insulated control damper

neoprene seal


1417

1477

UNDERSIDE VIEW control panel

FRONT VIEW

BACK VIEW


Notes: Weight - 168kg1.Finish - Galvanized Steel as standard or RAL 9010 2.available on request at additional costUnit shown without grilles. Grilles available on request at 3.additional costUnit supplied with mounting brackets4.

ISOMETRIC TOPSIDE VIEW

1532 1799

to s

uit

he

igh

t

A

B

DETAIL A SCALE 1 : 5

trimmer steels(by others)

Steel roof structure(by others)

12 mm drop rod(by others)

DETAIL B SCALE 1 : 5

Support bracketby Breathing buildings

12 mm drop rod(by others)

E stack unit S1500

C

DETAIL C SCALE 1 : 2

Notes:Shaft removed for clarityShown with e-stack fixing brackets, provided at additional cost

1 2 3 4

C

D

8

A

B

Suggested fixing with e-stack brackets

A3

SHEET 1 OF 1 SCALE 1:20

DWG NO.

DATESIGNATURENAME

Q.A

APPV'D

CHK'D

DRAWN

Third AngleProjection

Do not scale drawing

Surface texture to be umRa or better

Tolerances unless otherwise statedx.xx = +/- 0.05x = +/- 0.5angles +/- 0.5°

Dimension in mm

FINISH: FINISH

MATERIAL: MATERIAL

Revision

Rev AXBBC-100621-05

XC 15/07/2010

E

DEBUR AND BREAK SHARP EDGEs AND HOLES. iTEM MUST BE FREE FRO SCRATCHES, DENTS AND OTHER BLEMISHES

TITLE:

MFG

U-Value


S Series 3.4 (W/m2 K)


Damper air leakage


S Series 2.9 m3/h/m2


Conformity

CE marking Yes




Ext

ern

al T

emp 21 22 23 24 25

10 19.5 20.0 20.5 21.0 21.5

12 18.5 19.0 19.5 20.0 20.5

10 17.5 18.0 18.5 19.0 19.5

4 14.5 15.0 15.5 16.0 16.5

Based on fresh air flow rate of 150 l/s, 30 people at 5 litres/person/s


2524

S Series Terminations Installation

Shaft

Breathing Buildings offer two roof terminations, the penthouse louvre or the mushroom.

The penthouse louvre is the most common type of terminal and is frequently associated with a natural ventilation system. We offer a double bladed system as standard which offers class A weather performance with a triple bladed system for sites where better weather performance is required. The standard terminal comes in RAL 7035 (Light Grey) with corner posts and gabled roof but other options and sizes are available.

The mushroom terminal is an unobtrusive alternative to the traditional bladed metal louvre and has better noise attenuation properties. The terminal is RAL 7035 (Light Grey) as standard but other colours are available on request.

Both terminals offer optional acoustic attenuation.

A weathered builders curb around the perimeter of the roof penetration and shaft to the e-stack supports the roof termination which is usually a minimum height of 150mm above the finish roof surface. Once in place the roof terminal is fixed to the curb using self tapping screws at a maximum separation of 500mm. Once installed a bead of mastic or similar is laid around the perimeter of the overcurb.

When used with a louvred terminal the shaft is divided with a central circular duct (annulus) mounted within the square shaft. The duct commences immediately above the horizontal damper at the base of the shaft and should extend to the base of the terminal.

When a penthouse louvre terminal is used the duct extends up through the shaft to mid-way up the penthouse louvre. At this point the circular duct meets a square horizontal plate with a circular hole in the middle. In winter mixing mode the cold fresh air is drawn in through the top of the penthouse louvre and down through the middle of the duct. Exhaust air exits from the room around the outside of the duct and out of the lower half of the penthouse louvres.

When a mushroom termination is used a square duct separates the mixed air delivery within the shaft. The duct is located in the corner of the shaft forming an “L” shape in plan view. The shaft divided starts at the top of the S Series unit and finishes at roof level.

Physical properties




Lifting points Eyes supplied as standard


Optional attenuation 25 dB

1800 ±10 overcurb(including flashing)

1500 ±10 shaft opening

F

F

M M

1800 ±10 overcurb(including flashing)

1200 ±10

725

for 1

250m

m

louv

re h

eig

ht

roo

f te

rmin

al

50

150

min

heig

ht to

sui

t

1500 ±10 shaft opening

160

E

E

L

N

SECTION F-F

timber cap(by others)

SECTION E-E

160

DETAIL L SCALE 1 : 5

50mm max. interiorshaft insulation(by others)

shaft wall(by others)

cylindrical divider(by others)

insulation starts 160mm above base of shaft

BASE OF SHAFT

1200

±10

1500 ±10

1500

±10

50 insulation thicknessSECTION M-M

circular divider (by others)

brackets and method of fixing to be provided by others

150

50

DETAIL N SCALE 1 : 5

timber cap(by others)

shaft insulation(by others)

shaft wall(by others) TOP OF KERB

Counter sunk screw or recess head of roof screw

Test involves simulated rainfall of 75l/h at a wind speed of 13m/s (29 mph). Full BSRIA weather performance test data available on request

Shaft dimensions

W 1,550 mm

D 1,550mm

Weather performance

Double blade Triple blade

Performance Class A up to 1 m/s face velocity

Class A up to 2 m/s face velocity

S1500 Penthouse Louvre Dimensioned Drawing

S Series continued


2726

S1500 Mushroom Terminal Dimensioned Drawing S 1200 Dimensioned Drawing

Physical properties

Max Height (Dome to sill bottom) 875 mm

Max Length (across dome) 2170 mm

Max Width (across dome) 2170 mm

Height above curb

Typical weight

Finish

780 mm

<140 kg

RAL 7035 Grey standard. Other RAL colours available at additional cost

Lifting points Not fitted

Key dimensions

Overcurb 1800 x 1800 mm

Shaft 1500 x 1500 mm

Curb Height 150 mm

Curb Thickness 150 mm

Weather performance

Water testing has been carried out at the BRE using test method prEN 15601—Hygrothermal performance of buildings—resistance to wind driven rain coverings with discontinuously laid small elements. The mushroom profile terminal was subject to 75mm/hr/m2 at a driving wind speed of 30mph (13.4 m/s). Water ingress during the tests was too small to measure in meaningful terms.

630

500

15401276 75

130

465

1126

400


1232

1500

1540

1275

1350

678.

5

596.

5

TOP VIEW


1275

1192


RIGHT SIDE VIEW

insulated control damper

neoprene seal


1117

1178

UNDERSIDE VIEWcontrol panel

FRONT VIEW

BACK VIEW


Notes: Weight - 130kg1.Finish - Galvanized Steel as standard or RAL 9010 2.available on request at additional costUnit shown without grilles. Grilles available on request at 3.additional costUnit shown with e-stack mounting brackets at additional 4.cost.

ISOMETRIC TOPSIDE VIEW

Dimensions

H 500 mm

D 1,275 mm

W 1,275 mm

Weight 130 Kg




Electrical

Power Rating 0.1 kW





Refer to drawings XBBC-100706-02 RevA


Frequency Band (Hz) 125 250 500 1k 2k 4k 8k dB (A) dB (A)#

Winter Slow 35 29 26 20 16 18* 24* 28.6 30.7

Winter Fast 44 38 36 22 33 18* 24* 37.1 33.1

Summer Boost 39 35 36 32 28 18* 24* 36.3 32.7



63

32

39

33

S Series continued

875

A

A

SIDE VIEW

2169

TOP VIEWISOMETRIC VIEW

1830

Overcurb 1800 +-205

Curb width150

777

.50

A

SECTION A-A

Internal dividingwalls for use withS1500L

11.75

50

100

15

DETAIL A SCALE 1 : 5

Packing material

Space for roofing felt

Curb

Fixing centre

NOTESProvisional design, subject to change - S1500 Mushroom Roof Terminal (MRT) 1.C10-6RAL 7035 as standard. Available in other standard RAL colours at additional cost2.When installed, suitable packing must be used between mushroom skirt and 3.curb side - see detail A Compatable with S1500L only when used with e-stack: S-Series range4.For shaft dimensions and splitter details see installation drawing for S1500L5.


S Series Control and Interface


The S Series units have an integral control panel which provides power for the e-stack fans and damper and interfaces to the ancillary components e.g. Sensors, switches, etc. The control panel does not have any controlling elements which are serviceable to the user. Power is provided by others. The sensors are wired to the units by others using 4 core, screen cabling such as CY Cable or Trend Cable TP/2/2/22/HF/200.


Breathing Buildings e-stack systems do not form part of a fire strategy. However, e-stacks are able to react to a fire condition to close the damper and stop fans if a fire interface is desired and agreed with Building Control.

When fitted at high level such as in a sports hall we recommend the installation of a low level control panel, which replaces the on-board controller. Please contact us to discuss your project specific requirements.

2928

S1000 Dimensioned Drawing

392

500

882

FRONT

CONTROLBOX 900

1000

630

130

LEFT

1000 1103

RIGHT

CL

1063

CL 925

TOP

84

9

FIXING BRACKET

TEMP SENSOR

FAN MODULE

BOTTOM

INTERNAL CONTROL BOX

ISOMETRIC VIEW

MIXED AIR DELIVERY

CONTROL BOX

840

400

BACK

NOTES:ESTIMATED UNIT WEIGHT - 80KG (UNIT WEIGHT NOT ON PALLET)1.FINISH - GALV. STEEL AS STANDARD OR RAL 9010, AVAILABLE ON REQUEST AT ADDITIONAL 2.COSTUNIT SHOWN SUPPLIED WITH MOUNTING BRACKETS3.MIXED AIR DELIVERY HANDING TO BE CONFIRMED BY CUSTOMER PRIOR TO ORDERING4.E-STAK UNIT CAN BE HUNG FROM 4 NO. STEEL DROP RODS OR CRADLE ARRANGEMENT5.

Dimensions

H 500 mm

D 1,000 mm

W 1,000 mm

Weight 130 Kg




Electrical

Power Rating 0.1 kW





Refer to drawings XBBC-100706-02 RevA


Frequency Band (Hz) 125 250 500 1k 2k 4k 8k dB (A) dB (A)#

Winter Slow 35 29 26 20 16 18* 24* 28.6 30.7

Winter Fast 44 38 36 22 33 18* 24* 37.1 33.1

Summer Boost 39 35 36 32 28 18* 24* 36.3 32.7



63

32

39

33

S Series continued


onoff

test

S-Series Unit

13A Double Pole Switched Fused Connection Unit (FCU) for complete isolation)

External temperature sensor

Room temperature and CO2 sensor

4-core CY cable

5-core CY cable

Key Switch

4-core YY cable

Room Interface(Red and Blue panel)

On/Off/Test Switch


3130

S Series continued

Thermal Modelling

Breathing Buildings’ team of consulting engineers undertake thermal modelling simulations for every project at the proposal stage. Our 4DFlo modelling software uses dynamic thermal modelling calculations, using a model based on the formulae of CIBSE “Natural Ventilation in Non-Domestic Buildings”, and is compliant with the requirements of CIBSE.

Using 4DFlo dynamic thermal modelling, Breathing Buildings are able to demonstrate that each room complies with the Building Regulations Approved Document Part F as well as the relevant overheating criteria for the building type. Breathing Buildings frequently design to BB101 or CIBSE overheating criteria, but can also meet a client’s specific requirements.

Breathing Buildings is also at the forefront of design to meet the new adaptive comfort criteria set out for the Priority Schools Building Programme and soon to be outlined by CIBSE.

When required Breathing Buildings can take design responsibility for the ventilation strategy based on the calculations prepared using 4DFlo.

Breathing Buildings are also able to aid consultants in their modelling of e-stack ventilation strategies in thermal modelling packages such as IES-VE. Our trained IES-VE users can provide documentation and face-to-face advice to modellers in order to accurately represent the e-stack’s function. Our Consulting Engineers also use IES-VE as a design tool as part of our consultancy work on larger or more complicated projects.

When the design team has particular concerns about air distribution or temperature variation across a space, Breathing Buildings offer consultancy services in CFD (Computational Fluid Dynamics) using ANSYS CFX software.

Breathing Buildings support the design team throughout the design process of a natural ventilation strategy. From providing advice at the concept stage, through to detailed calculations as the building layout and detail design evolves, through to demonstrating compliance and learning from post-occupancy monitoring.

Modelling is one thing, delivering low energy buildings is quite another. We work with our clients throughout a project to ensure that their energy bills are as low as possible, including going back to monitor a project where appropriate. This can also be valuable for BREEAM as post occupancy evaluations are an important aspect of the assessment. The information gained from the monitoring provides us with a wealth of information and shows that not only do we design low-energy buildings we also deliver them!


33

The A Series is designed for a standard school classroom or office where a corridor or atrium is used and which provides access to the exterior at high level. It is particularly helpful in multi-storey buildings where it is not feasible to create dedicated shafts through upper level rooms to provide air pathways to lower floors from the roof

32

A Series

When vents or windows are located at the top of atria in multi-storey buildings then these can be used for in- and out-flow in colder weather. When the atrium is warmer than the outside then air will come in and out of the high level windows if all other doors and windows lower in the building are closed. Unlike a classroom situation, the air which enters through high level windows in an atrium can fall 10+ metres before reaching occupants. The descending plumes of relatively cold, dense air can therefore entrain sufficient atrium air before reaching occupants so that cold draughts are avoided naturally.

The A Series units have been designed to provide an exchange flow between the atrium and occupied rooms in winter mode. The A 500 units typically operate in pairs and use low energy fans to drive the exchange flow through low resistance acoustically attenuated ducts. The A 400 units work as a standalone system, each one comprised of a duct with a fan and an adjacent passive acoustically attenuated duct.

In warmer weather, when fresh air can be brought into the rooms via facade vents or opening windows without risk of cold draughts, the strategy changes to displacement mode. Air is brought into the rooms through the opening facade vents or windows and is exhausted into the atrium through all of the A Series units. In this case the fans are not used and the flow is completely natural. The exhaust air rises and leaves the building via the opening windows or vents atop the atrium. The A 500 units are ceiling mounted and have been designed to operate in pairs, providing sufficient ventilation for occupancy levels of 10 to 35 people. The fans are used in winter exchange mode and are normally off in warmer weather when the displacement mode is used. However, on the hottest days the fans can be used again but in this case all of the fans operate in the same direction to provide fan-assisted natural ventilation exhaust into the atrium.

In summer air is brought into the rooms through the opening facade vents or windows and is exhausted into the atrium through all of the A Series units.


Product Information



• Acoustic attenuator to provide acoustic separation of atrium and occupied rooms

• Night cooling

• Internal temperature sensor with integrated CO

2 sensor


• Networked, integral controllers report to central Atlas Control panel to respond to local conditions




• Key switch for automatic operation; long term off; test


Options• Penthouse louvre or mushroom terminal in atrium

• Actuated windows or dampers in atrium

• Noise attenuation for noisy sites





• Fire dampers

Air Flow Strategies



Winter ModeWhen the outside temperature becomes too low to bring directly onto the occupants the A Series units operate in exchange mode. The building ventilates naturally by exchanging air naturally between the atrium and exterior. The occupied rooms exchange flow using low energy fans within the A Series units, preventing the need for wasteful preheating of fresh air.

3534

A Series continued


3736

Installation

The A Series comes with fixing brackets.

The e-stack unit can be hung from 4 no. pieces of M10 studding of maximum length 1200mm. The unit can be lifted into place and four M10 Studding (drop-rods) are brought through the holes on the end of the brackets, positioned and secured in place using a pair of M10 full nuts per bracket.




Winter Slow 45 43 38 34 31 21 18* 24* 36.2 32.5

Winter Fast 46 45 39 36 34 24 18* 24* 38.3 33.4

Summer Boost 46 45 39 36 34 24 18* 24* 38.3 33.4



Crosstalk attenuation Rating Dn,e,w(C;Ctr)

Frequency Band (Hz) 250 500 1k 2k 4k 8k dB (A)

Winter Slow 38 36 43 49 43 38 45 (-3;-8 )dB

A Series continued

A500 Dimensioned Drawing

Dimensions

H 503 mm

D 1,338 mm

W 1,810 mm

Weight 174 Kg




Electrical

Power Rating 0.1 kW






Conformity

CE marking Yes


471.

5

31.5

1458

1640

1418

1810

1338

TOP VIEW

65

160040

RIGHT SIDE VIEW

900

UNDERSIDE VIEW mixed air delivery

FRONT VIEW

60

BACK VIEW

mixed air delivery

Notes: Weight - 200kg1.Finish - Galvanized Steel as standard or RAL 9010 2.available on request at additional costUnit shown without grilles. Grilles available on request at 3.additional costUnit shown with e-stack mounting brackets at additional 4.cost.

ISOMETRIC UNDERSIDE VIEW


3938

Installation

The A Series comes with fixing brackets.




Laboratory Measurement of Airborne Sound Insulation of Small Building Elements in accordance with BS EN 20140-10:1992, ISO 140-10:1991

A Series continued

A400 Dimensioned Drawing

Dimensions

H 410 mm

D 1,500 mm

W 1,700 mm

Weight 180 Kg




Electrical

Power Rating 0.1 kW






Conformity

CE marking Yes


402 1298

642 CABLE ACCESSFAN

1743

1825

1700

1430

81

5050

1500

410

134

MECHANICALSIDE

PASSIVE SIDE

ANY DUCT WORK SHOULD MAINTAIN THE SEPARATION BETWEEN MECHANICAL AND PASSIVE SIDE Acoustic performance Sound Power (dB) Overall Ambient


Winter Slow 49 43 27 19 15 14 18* 24* 30.0 30.9

Winter Fast 58 47 33 19 15 14 18* 24* 35.3 32.6

Summer Boost 58 47 33 19 15 14 18* 24* 35.3 32.6



Crosstalk attenuation Rating Dn,e,w(C;Ctr)

Frequency Band (Hz) 250 250 500 1k 2k 4k 8k dB (A)

Winter Slow 24 32 49 61 51 40 35 44 (-2;-7) dB


A Series Control and Interface


The A Series units have a combination of centralised and integral control.


Breathing Buildings E-Stack systems do not form part of a fire strategy. However, e-stacks are able to react to a fire condition and stop fans if a fire interface is desired and agreed with Building Control.

4140

A Series continued

The atrium is often the architectural heart of a building, offering space, light and a feeling of airiness. But it brings with it specific ventilation, cooling and heating challenges. To address these issues Breathing Buildings has designed the A Series natural ventilation system.


43

If there is a clerestory window concept as indicated in the figure shown then the unit will operate in single sided mixing ventilation mode in winter and in summer using displacement cross-flow ventilation. Without an elevated facade the F500 units or our new FX units operate as a pair to provide ventilation

The F Series is designed for a standard school classroom with anelevated facade.

42

F Series

Product Information



• Night cooling


• Internal temperature sensor with integrated CO2 sensor






• Key switch for automatic operation; long term off; test


Options• Patented heating control strategy ensures minimum energy use

• Weather louvre

• Noise attenuation for noisy sites

• Integrated noise attenuation through combination of acoustic louvres and internal baffles depending on site specific requirements




The F1000 unit is a facade mounted unit that has been designed to ventilate a room with occupancies from 10 to 35 people. Integrated fans mitigate cold draughts in a low energy way delivering appropriate ventilation and superb thermal comfort. The illustration below shows an F1000 unit located in room with another variable control damper located on the same facade in the opposite corner of the room

Air Flow Strategies



Winter ModeWhen the outside temperature becomes too low to bring air directly onto occupants the F Series operates to pre-mix the incoming cold fresh air with warm room air to mitigate the risk of cold draughts and eliminate the need for wasteful pre-heating with radiators. Exhaust is provided by an adjacent window or variable control damper provided by Breathing Buildings.

Summer Winter


4544

F1000 Dimensioned Drawing Performance Installation

The F Series comes with fixing brackets.




Dimensions

H 500 mm

D 1,000 mm

W 1,000 mm

Weight 80 Kg




Electrical

Power Rating 0.1 kW








Winter Slow 33 39 33 29 21 15 18* 24* 30.6 30.8

Winter Fast 41 52 43 40 37 28 19* 24* 41.8 35.0

Summer Boost 38 39 38 37 33 23 18* 24* 37.4 32.3



U-Value


F Series 3.4 (W/m2 K)


Damper air leakage


F Series 2.9 m3/h/m2


Conformity

CE marking Yes




Ext

ern

al T

emp 21 22 23 24 25

10 19.5 20.0 20.5 21.0 21.5

12 18.5 19.0 19.5 20.0 20.5

10 17.5 18.0 18.5 19.0 19.5

4 14.5 15.0 15.5 16.0 16.5

F Series continued

ISOMETRIC VIEW

RIGHT VIEW

MIXED AIRDELIVERY

CONTROLBOX

FRONTLEFT

BACK RIGHT

392

500

FRONT VIEW

840

400

145

CL

925

CL 1063 1000

TOP VIEW

1000

CONTROL BOX

FIXING BRACKET

FAN MODULE

TEMP SENSOR

BOTTOM VIEW

1103 BACK VIEW

NOTES:UNIT WEIGHT - 60KG1.FINISH - GALV. STEEL AS STANDARD OR RAL 9010, AVAILABLE ON REQUEST AT ADDITIONAL COST

2.

UNIT SHOWN WITHOUT GRILLES, AVAILABLE ON REQUEST AT ADDITIONAL COST

3.

UNIT SHOWN WITH MOUNTING BRACKETS4.MIXED AIR DELIVERY HANDING TO BE CONFIRMED BY CUSTOMER PRIOR TO ORDERING

5.

E-STACK UNIT CAN BE HUNG FROM 4 NO. STEEL DROP RODS OR CRADLE ARRANGEMENT

6.

LEFT VIEW

High Level opening Window or Damper

Inflow to room

Mixing airfrom roominto main

e-stack unit

Main e-stack unit

inflow to room via front grille (as shown)

Grille

1000mm

500mm


4746

F Series continued

1103

FRONT

INTERNALCONTROL BOX

CL

925

CL 1063

TOP

1000

RIGHT

BOTTOM

FIXING BRACKET

INTERNALCONTROL BOX

FAN MODULE

LEFT

500

3

92

BACK

ISOMETRIC VIEW

MIXED AIRDELIVERY

FRONT RIGHT

LEFT BACK

NOTES:-

E-STACK SUPPLIED WITH FIXING BRACKETS1.TYPICAL UNIT WEIGHT. - 59kg2.FINISH - GALV. BUT AVAILABLE IN RAL COLOURS AT ADDITIONAL COST3.

INTERNAL CONTROL BOX

F500

The F500 units are designed to provide single sided, mixing ventilation. They are designed for use in spaces with limited floor to ceiling height. The damper is mounted on the side of the mixing chamber rather than above it as in the F1000. A single sweep fan draws room air up to meet the inflow, cold air in winter. The F500 unit provides both inflow and outflow in winter. It is designed to provide ventilation for up to 16 people and multiple units can be used in higher occupancy. In summer the units are usually operated in conjunction with lower level vents or opening windows. The F500 units provide the exhaust pathway whilst fresh air enters through the lower opening.

F Series Control and Interface


The F Series units have a combination of centralised and integral control.

The units have an optional interface with a building management system (BMS) using a series of pre-defined modbus points table.

Breathing Buildings systems do not form part of a fire strategy. However, e-stacks are able to react to a fire condition to close the damper and stop fans if a fire interface is desired and agreed with Building Control.


onoff

test

MAINS(via isolator)

Outside temperaturesensor

Room temperature(RT) and CO2

sensor

24VDC, Ext T, GND, E

24VDC, RT, CO2, GND, E

24VDC, ON/OFF Signal, Test Signal, E

24VDC RED LED, 24VDC BLUE LED, GND, E

Room Interface(Red and Blue panel)

Insulated façade damper(s)or window(s) (supplied by other)

On/Off/Test Switch

Thank you so much for your help so far! We wouldn’t have made it without you.


4948

Other system components

Phase Change Material

We use other system components to ensure the quality and service of our products.

By having the PCM exposed to occupants, the perceived temperature in the room is reduced, which means it is the most effective means of delivering thermal comfort and easiest way to comply with the new CIBSE and EFA Adaptive Thermal Comfort criteria.


5150

Other system components continued

Window Actuation

Most of our systems are compatible with manual window control. Where windows are not accessible, high up in an atrium or sports hall, or for convenience or security then we have partnered with SE Controls to deliver best in class actuation and control.

Manual opening windowsManual winding gear solutions can be applied to single or multiple vents to provide smoke or natural ventilation. With opening strokes of 250mm or 380mm they are available in 3 standard finishes.

Automated windowsSE Controls’ chain actuators provide the most common and cost effective solution for window automation. They are usually surface mounted but concealed solutions can also be offered. Actuators are available in a range of stroke lengths from 100mm – 1000mm and with fingertrap risk mitigation technology built in. Additional multi-point locking actuators help satisfy weather and security performance requirements.

Integration with Breathing BuildingsIntegration varies depending on the mode of operation and the size and scope of a particular project. The integration can range from provision of a 0-10V control signal to Breathing Buildings providing and installing the full system through our partners SE Controls.

What to consider when you need to automate a window?The following 12 criteria are an indication of the types of information you may need to consider when choosing the correct actuator for your application.

• Smoke or natural ventilation • Finish• Chain or linear actuator • Voltage• Actuator size/aesthetics • Force (N)• Locking points • Hinge type• Vent position • Speed• Free area requirement • Flex length and / Opening stroke specification

InstallationWith a varied range of automation products, partnered with the vast array of window systems and materials available within the industry, the need for qualified and experienced engineers is more important now than ever. It is well documented that 90% of product failure can be attributed to incorrect installation and product selection. SE Controls have a national network of over forty engineers all of which have been trained via their in house installation academy. They are familiar with window system componentry and all hold CSCS certification.


5352

Other system components continued

Dampers

Many natural ventilation systems incorporate façade dampers to provide air pathways where it isn’t desirable or possible to have windows. We provide a large range of variable control dampers and associated weather louvres. The dampers are insulated and have seals to minimise the air leakage from them when closed. The dampers are supplied with fully variable actuators.

In noisy locations, acoustic linings or acoustic attenuators are provided so that sufficient attenuation is provided. The extent of attenuation depends on the specific site conditions.

The actuators can be controlled using the Breathing Buildings range of ventilation controllers, or if supplied as product-only they can be controlled by the Building Management System.

There are climates and building types when controlled natural mixing ventilation is not required. For example, if a building is located in a zone where the external temperature is consistently above 15°C then it is not necessary to pre-mix the incoming fresh air with room air in order to mitigate cold draughts. Alternatively, if the building is a factory with doors open a lot for loading, then the building may be ventilated adequately in winter through the loading doors and no winter mixing system is required. Finally, if the high level dampers are sufficiently high away from occupants in an occupied room, then it may be possible to achieve sufficient ventilation and natural mixing of the incoming plumes of cold air with the warm room air to prevent cold draughts in winter.

In all of these scenarios the most cost effective means of providing natural ventilation is via a damper in a shaft or a damper in a wall. The high level damper will be used to provide outflow and a cooling effect in warmer weather. In colder weather, the damper can be used to provide both the inflow and outflow if necessary, but in this case it is necessary to ensure that low level openings (such as doors) are closed.

We provide a full range of roof and façade based dampers, penthouse louvres, mushroom terminals, façade louvres and grilles.

For cases where summertime peak temperatures need to be capped and guaranteed, natural ventilation with mechanical cooling is the ideal and lowest energy solution. The hybrid solution from Breathing Buildings is based on our natural ventilation systems and cooling products activated from the Breathing Buildings controller. We have developed the solution in partnership with Mitsubishi and it is appropriate for a wide range of systems.

Natural Ventilation without Mixing Natural Ventilation with Cooling

U-Value


Passive Stack 3.4 (W/m2 K)

Damper air leakage


Passive Stack 2.9 m3/h/m2


U-Value


Passive Stack 3.4 (W/m2 K)

Damper air leakage


Passive Stack 2.9 m3/h/m2



Yet there are situations where the heat gains in the space are not sufficient to pre-heat the incoming air and it makes sense to use heat recovery:

Low occupancy spaces such as residential developments or cellular offices where the internal heat gains are much lower

Cold climates where the heat balance means you spend a greater proportion of the year.

5554

New products

We have a superb range of natural ventilation products and systems for nearly all applications, yet we are constantly striving for better solutions in more environments. With that in mind we will be launching these products in the coming months

FX Series

One of the traditional problems with single sided natural ventilation is that without cross flow it the air at the back of a room does not get refreshed.

We have spent a lot of time understanding buildings and the impact of the ventilation strategy on energy performance. As you can see from the adjacent graphs the e-stack mixing ventilation strategy offers significant benefits compared to both conventional natural ventilation and hybrid MVHR systems in a typical classroom environment.

Heat recovery in deep winter Mixing ventilation in mid season Displacement ventilation in summer

This is common problem in deep plan buildings or multi floor spaces such as offices where there is no roof access and an atrium system is not applicable.

The F Series hybrid from Breathing Buildings provides a solution to this problem, using a low energy fan and natural mixing to create a superb internal climate.

In the summer, natural ventilation will primarily be by manual opening windows, however, in peak summer conditions the fan integral to the FX-Series will run to provide boost ventilation at the back of the room.

In the winter, opening windows in the classroom will be closed. The damper on the FX-series will open in order to control CO

2 levels in the space. The integral fan in

the FX-series will ensure than warm room air is drawn upwards to temper the cold incoming air. This tempered air will then be supplied to the room via the acoustically attenuated duct to the rear of the classroom. Warm, stale air will exit the classroom via the balancing dampers as part of the FX-series unit. The FX-unit is capable of providing a daily average of 5l/s/person of fresh air to a room with an occupancy of 16 or less.

A secure nightcooling strategy will also take place after warm summer days to purge the building air and fabric of heat. This will take place by the same method as our wintertime strategy.


NVHR™ - Natural Ventilation with Heat Recovery

Breathing Buildings is the leading solutions provider in the field of Natural and Low Energy Ventilation. We offer you a full turnkey service or a selection of services to suit your needs.

1. Advisory services and consultation on Natural and Low Energy ventilation.

2. Design services • Dynamic thermal modelling • Computational fluid dynamics • Water bath modelling • Design responsibility with full PI cover

3. Product solutions • Products to meet your criteria • Fully automatic controls and BMS integration • Integration with other building systems including BMS, HVAC and heating • Modelling

4. Installation support

5. Commissioning and user training

6. Service, maintenance, software upgrades and extended warranty

7. Monitoring

56

Let us helpyou changethe world...

bb catalogue june 2013

Documents

mixing53 natural ventilation

low energy ventilation

number of buildings

low energy building

natural ventilation07

natural ventilation05

awardsbreathing buildings

estack system