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Certificate No: GB9455
AIR VENTT E C H N O L O G Y
SMOKEX® - C E certified to Class F300/120 or F400
for fresher air
EMERGENCY
SMOKE
EXTRACT
Tel: 01264 356415 Fax: 01264 337854
Email: sales@airventtechnology.co.uk Web: www.airventtechnology.co.uk
Page 2
Emergency Smoke Extract
Index - SMOKEX®
LCA-JT/HT SMOKEX® Axial impulse fans for car park ventilation
F300/120 - F400
Pages 4-5
JTCHT SMOKEX®
Centrifugal induction fans for car park ventilation
F300/120
Pages 6-7
CAHT SMOKEX® High efficiency duct axial fans
F300/120 - F400
Pages 8-14
LCAHT SMOKEX®
High performance duct axial fans
F300/120 - F400
Page 15
CRHHT SMOKEX® Centrifugal roof fans
F400
Pages 16-18
CRHT SMOKEX® Vertical discharge centrifugal roof fans
F400
Pages 19-22
PRQHT SMOKEX®
Backward curved centrifugal fans
F400
Pages 23-26
CBBHT SMOKEX® Belt driven double inlet box fans
F400
Pages 27-30
Car Park Ventilation - Principles and Solutions Pages 31-33
Accessories Pages 34-39
Tel: 01264 356415 Fax: 01264 337854
Email: sales@airventtechnology.co.uk Web: www.airventtechnology.co.uk
Page 3
IntroductionThe mechanical ventilation systems
shown in this catalogue resolve the prob-
lems connected to smoke extraction at
high temperature and are the ideal solu-
tion for emergency extraction in case of
fire.
Potential Risks in Fire Situation• release of gas and toxic substances
causing eyes to water and conse-
quent difficulty in escaping
• ashes can be suspended in the atmos-
phere leading to reduced or no visi-
bility
• development of very high tempera-
tures
• the increase of carbon monoxide and
reduction of oxygen in the air (possi-
bly leading to asphyxiation)
Function and Advantages of
Mechanical Ventilation in
Case of Fire
1. Mechanical ventilation removes
smoke and fumes produced by a fire
and by creating negative pressure (in
the ambient) it prevents smoke
spreading into other part of the
building. This makes it easier for
people to escape and simplifies the
job of the fire and rescue services.
2. In enclosed areas, temperatures can
easily exceed 1000° C, causing com-
bustion from heat radiation and mak
ing any external extinguishing opera
tion useless. Keeping the tempera
ture relatively low (300°- 400° C) by
extracting hot air, can avoid the col-
lapse of support structures. In addi-
tion, the higher oxygen levels will
cause better combustion and thus,
for most materials, a lower produc-
tion of toxic smoke.
3. Mechanical ventilation allows the sit-
ing of the exhaust outlets away from
the fire. High temperature axial fans
are easily connected to a duct sys-
tem.
4. Mechanical ventilation allows the ex-
traction of cold fumes, which since
they remain at a lower level are dan-
gerous and are difficult to remove
using static systems.
5. Mechanical ventilation allows for ven-
tilation in normal circumstances
(clean air), using products with two
speed motors: at low speed for nor-
mal ventilation (so with lower noise
level) and at high speed for emer-
gency conditions. For this type of op-
eration, it is necessary to install the
fan with a dedicated power line that
automatically operates in case of fire.
CertificationEmergency Smoke Extract fan design and
installation is regulated by the European
standard EN12101-3, which establishes
the temperature ranges/operation time
certified products must comply with.
The SMOKEX® range is CE certified
to classes F300 and F400 and guaranteed
to operate at 300°C for two hours in
compliance with EN12101-3 standard by
the Applus laboratories in Barcelona.
Emergency Smoke Extract
Principles and Solutions
Tel: 01264 356415 Fax: 01264 337854
Email: sales@airventtechnology.co.uk Web: www.airventtechnology.co.uk
Page 4
DescriptionAxial impulse fans suitable for installation
in underground car parks and/or tunnels.
They have been designed and certified
for the handling of smoke and hot gases
caused by fire. These fans are dual pur-
pose, i.e. they provide both normal ven-
tilation (carbon monoxide removal) and
smoke control in case of fire.
In the standard configuration for
normal ventilation (CO extract),
the range can be used up to a tem-
perature of +60°C. The fire/smoke
extraction models (HT) are CE
certified to class F300 or F400, and
guaranteed to operate at 300°C for
two hours in compliance with Stan-
dard EN12101-3 by the Applus lab-
oratories in Barcelona.
The special impulse induction fan tech-
nology represents the most innovative
and cost-effective alternative to tradi-
tional ducted mechanical extraction sys-
tems. There is a drastic reduction in
the cost of installation (no need for
ducted and grilled systems) and consid-
erable running cost savings (the
same fan controls polluted air and
smoke and hot gases). Additionally, it
is possible for sections of the system to
operate only when the need arises (with
other sections of the system not oper-
ating).
Construction• Silencers in galvanized steel sheet
lined with high performance
acoustic insulation material.
• Deflector on outlet side for optimum
air discharge and directional control.
Supplied as standard.
• Protection guard on inlet side.
• Fixing brackets in galvanized steel
sheet for ceiling (or wall) installation.
Supplied as standard and pre-assem-
bled.
• Silencers are fitted at both ends with
a specially designed smooth bell
shape to improve air performance,
reduce loss, and lower sound level.
• Housing in electrolytically galvanized
steel sheet.
• Hub impeller and aerofoil profile
blades in aluminium. They are bal-
anced according to ISO 1940 G.6.3.
with variable pitch angle.
• Terminal box IP54, resistant to high
temperature and supplied as stan-
dard.
Motor• Asynchronous three-phase motors
380-420V 50 Hz conforming to
international standards IEC 60034,
IEC 60072, EMC 2004/108/CE, LVD
2006/95/CE.
• Suitable for DOL (Direct On Line)
start.
• CE marked.
• Protection IP55, class F or H.
• Execution 4 (with impeller directly
coupled to motor with feet)
Also available
• Non SMOKEX® models suitable
for continuous operation to a maxi-
mum of 60ºC.
• Size 350mm.
• Models with 100% reversible airflow.
• Service switch IP67 for high tempera-
ture, assembled.
JET FANS impulse fans for car park ventilation
LCA-JT/HT SMOKEX®
Terminal Box - IP54
high temperature
resistant
Service switch - IP67
tested & guaranteed for
high temperature
F300/120 & F400Certificate 0370-CPR-2095
Certificate 0370-CPR-2094
3/4 week delivery
Tel: 01264 356415 Fax: 01264 337854
Email: sales@airventtechnology.co.uk Web: www.airventtechnology.co.uk
Page 5
JET FANS impulse fans for car park ventilation
LCA-JT/HT SMOKEX®
Technical Data
Model NoAirflow
m3/sec
Airspeed
m/sec
Thrust
N
dB(A)
@ 3m
Speed
rpm
Power
kW
In (400V)
Amps
Volts -
50 Hz
Temp
Class
LCA-JT312HT 1.28 17.3 27 54 2790 0.75 1.57 380-420
F300/120
F400
LCA-JT312/4HT 1.28/0.64 17.3/8.7 27/07 54/43 2820/1400 0.80/0.20 1.91/0.60 380-420
LCA-JT402HT 2.88 22.3 78 58 2870 1.50 3.01 380-420
LCA-JT402/4HT 2.88/1.44 22.3/11.2 78/20 58/47 2900/1435 1.50/0.37 3.54/1.25 380-420
LCA-JT404HT 1.44 11.2 20 47 1430 0.55 1.36 380-420
LCA-JT312T 1.28 17.3 27 54 2830 0.55 1.50 380-420
+60ºCLCA-JT402T 2.88 22.3 78 58 2825 1.50 3.40 380-420
LCA-JT404T 1.44 11.2 20 47 1330 0.18 0.70 380-420
Dimensions (mm)
Fixing
Brackets
Service Switch
Protection Grid Deflector
Model A B ØC D E F G H 1 Weight kg
LCA-JT310 415 375 415 240 630 200 134 1595 6 65
LCA-JT400 500 460 500 270 800 230 134 1965 6 80
Tel: 01264 356415 Fax: 01264 337854
Email: sales@airventtechnology.co.uk Web: www.airventtechnology.co.uk
Page 6
DescriptionCentrifugal induction fans suitable for in-
stallation in underground car parks
and/or tunnels. They have been designed
and certified for the handling of smoke
and hot gases caused by fire. These fans
are “dual purpose”, i.e. they provide both
normal ventilation (carbon monoxide re-
moval) and smoke extract in case of fire.
The fans are suitable for continuous
operation at +40°C and are CE cer-
tified to F300 class and guaranteed
to operate at 300°C for two hours,
in compliance with Standard
EN12101-3 by the Applus laborato-
ries in Barcelona.
The special impulse induction fan tech-
nology represents the most innovative
and cost-effective alternative to tradi-
tional ducted mechanical extraction sys-
tems. There is a drastic reduction in
the cost of installation (no need for
ducted and grilled systems) and consid-
erable running cost savings (the
same fan controls polluted air and
smoke and hot gases). Additionally, it
is possible for sections of the system to
operate only when the need arises (with
other sections of the system not oper-
ating).
Construction• Hub impeller and aerofoil profile
blades made in aluminium and bal-
anced according to ISO 1940.
• Housing in electrolytically galvanized
steel sheet.
• Protection guard on inlet side.
• Fixing brackets in galvanized steel
sheet for ceiling (or wall) installation.
Supplied as standard and pre-assem-
bled.
Motor• Asynchronous three-phase double
polarity motors 380-420V 50 Hz.
• Suitable for continuous operation in
maximum ambient temperature of
40ºC (service S1)
• Will operate for 2 hours in tempera-
ture up to 300ºC (service S2)
• CE marked.
• Protection IP55, class H. Suitable for
continuous running (S1).
• Execution 5 (with impeller directly
coupled to motor shaft).
Also available• Service switch IP67 for high tempera-
ture, assembled
3/4 week delivery
Centrifugal induction fans for car park ventilation
JTCHT SMOKEX®
F300/120Certificate 0370-CPR-2096
Tel: 01264 356415 Fax: 01264 337854
Email: sales@airventtechnology.co.uk Web: www.airventtechnology.co.uk
Page 7
Technical Data
Centrifugal induction fans for car park ventilation
JTCHT SMOKEX®
Model NoAirflow
m3/sec
Airspeed
m/sec
Thrust
N
dB(A)
@ 3m
Speed
rpm
Power
kW
In (400V)
Amps
Volts -
50 Hz
Temp
Class
JTC254/8HT 1.5 26.9 50 70/53 1400/700 1.2/0.3 3.3/1.40 380-420 -20ºC to +40ºC
F300/120JTC304/8HT 2.7 30 100 71/55 1400/700 2.2/.055 5.6/2 380-420
Dimensions (mm)
Model A B C D E F G H 1 J K L Weight kg
JTCHT250 830 863 897 415 186 458 740 252.5 230.5 740 1170 1206 78
JTCHT300 1000 1074 1067 500 243 515 852 308 291 852 1425 1457 100
Tel: 01264 356415 Fax: 01264 337854
Email: sales@airventtechnology.co.uk Web: www.airventtechnology.co.uk
Page 31
Basic PrincipleThe ventilation of enclosed or under-
ground car parks demands certain key
fundamentals:
• the removal of pollutants emitted by
vehicles
• the control and removal of hot fumes
and gases in the event of a fire
• the effective protection of escape
routes (which also provides easier ac-
cess for Emergency Services)
Special TechnologyIn recent years, the jet or induction fan
technology has become the new stan-
dard for normal ventilation and for
smoke extraction in case of fire in en-
closed car parks.
This technology represents the most in-
novative and cost-effective alternative to
traditional ducted mechanical extraction
systems. The careful management of the
project in all its development stages (re-
quireing the use of fluid dynamics calcu-
lation programs) ensures that the system
will operate efficiently and correctly.
Car park ventilation systems provide ei-
ther normal ventilation to remove fumes
and other pollutants, or can extract
smoke at very high temperatures should
there be a fire in an underground car
park. Or they can be combination of
both, i.e. dual purpose fans.
Integrated SystemsA fully integrated car park ventilation
system requires five key elements:
• suitably positioned carbon monoxide
(CO) and heat/smoke sensors
• a system control panel
• CFD (computation fluid dynamics)
analysis
• accurate selection and positioning of
smoke control fans
• contaminated air removal system.
The system is based on placing a set of
axial impulse fans or centrifugal induction
fans throughout the parking area, which
operate in a similar way to a ducted
system. When installed on the ceiling,
they transfer the smoke-laden air from
the upper to the lower layers, creating a
continuous air flow, inducing cleaner,
cooler air which drives the smoke to the
extraction and removal points. The sys-
tem is completed by natural or mechan-
ical air inlets and exhaust fans.
Normal VentilationThe axial impulse or centrifugal induction
fans efficiently ventilate both bottom and
top layers avoiding the creation of areas
where air could get trapped. The fans
are only operated when the CO
(carbon monoxide) detectors show a
level of pollution higher than the
pre-set level (variable according to re-
quirements).
Emergency Smoke Extract
Car Park Ventilation
Principles and Solutions
LCA-JT/HT - axial impulse
fans for car park ventilation
JTCHT - centrifugal
induction fans for car park ven-
tilation
LCA-JT/HT
or JTCHT
CAHT
LCAHT
Normal Ventilation
A fire starts
The ventilation system starts to operate
The smoke is extracted
Tel: 01264 356415 Fax: 01264 337854
Email: sales@airventtechnology.co.uk Web: www.airventtechnology.co.uk
Page 32
AdvantagesA smoke and fume extract system
based on impulse axial or centrifugal in-
duction fans can easily be split into dif-
ferent control areas. This ensures
maximum extraction of smoke from
the area where fire has broken out and
increased the air pressure where the
fire needs to be extinguished. Pressure
is lowered at the site of the fire, stop-
ping fumes spreading, and reducing the
temperature of the fire affected area.
Compared to a ducted ventilation sys-
tem, this innovative system ensures
multiple benefits in terms of the low
cost and efficiency associated with its
design, installation, operation and usage.
Design • The compact size of the fans and the
flexibility of installation allows the op-
timisation of space.
• Design time is saved since there is no
need for a complex ducted system.
• The system effectiveness can be pre
dicted with CFD (fluid dynamics cal
culation) modelling.
• It allows the project designer to ben-
efit from a better pre-sales customer
service.
• The project can be financially as-
sessed within 24 hours to make sure
that the final costs are in line with ex
pected costs.
Installation• The fans are easy to install, ensuring
time saving in terms of hours of
work.
• There is no need for an expensive
and complex duct and grille systems.
• The smaller sizes of the fans adds to
the ease of installation of other serv-
ices (sprinklers, lighting etc);
• The fans and systems are easy to
maintain and service.
Operation Major savings in running costs are
ensured by the system's distinctive
features:
• The ventilation system can be fully or
partly operational. Carbon monox-
ide (CO) detectors and the smoke
sensors, ensure that only those fans
operate which are located in areas
where pollution levels are exceeded
or where a fire has started.
• Less total power required as the ac
curate design ensures the optimal
size of the ventilation system. The
inlet and exhaust fans can be smaller
as the jet or induction fans generate
a negligible pressure drop compared
to ducted systems.
Use
• Better quality of breathable air:
this system creates a continuous air
flow mixing different layers of air and
avoiding areas of trapped air.
• Optimised safety in the event of
a fire: fast and effective toxic fume
extraction, leading to safer escape
routes, easier access for emergency
services, promoting people safety and
minimising the effects of fire on the
building structure.
From Design to Customer
Service Designing a car park ventilation system
requires the application of CFD. The high
complexity and reliability of fluid dynam
ics calculations are well established. Dur-
ing this crucial design stage, we can offer
a full CFD analysis and valuable engineer-
ing support.
How it WorksCFD calculation is essential to ensure
that all areas of the car park are correctly
ventilated and, in the event of fire, fume
extraction is optimised.
CFD analysis is also necessary to calcu-
late accurately the size of the ventilation
system required together with the cor-
rect positioning of the jet or induction
fans and of the other exhaust and/or
inlet fans.
This calculation is based on computer
simulation and combines variables such
as the required number of air
changes/hour (as required by regulation),
air volume and direction, and the struc-
tural features of each car park (in a 3D
model).
The data generates dynamic scenarios
based on air speed profiles, particle
movement and airflow distribution. This
allows a customised ventilation scheme
to be designed. This methodical ap-
proach allows not only prediction of the
system effectiveness, but also ensures the
most cost-effective solution.
Car Park Ventilation
Principles and Solutions
Tel: 01264 356415 Fax: 01264 337854
Email: sales@airventtechnology.co.uk Web: www.airventtechnology.co.uk
Page 33
Calculation Set-up and
Scenario DevelopmentAccount must be taken of boundary conditions and initial
conditions such as external pressure and outside air temper-
ature. Structural parameters (light wells, access ramps etc)
also need to be specified, together with operating conditions
(material definition, assignment of air performance required).
Mesh definition is also necessary (ie the quantity of primary
volumes the model must be split into). Data processing and
assessment of each scenario can be made by changing the
type, quantity and position of the fans.
Analysing Results and
Developing a Balanced SolutionData can be analysed by checking the air speed inside each sec-
tion of the car park.
The graph shown below represents the average air speed on a
sectional floor.
Final ScenarioDuring this last stage, the computer programme analyses the
system effectiveness.
Car Park Ventilation
Principles and Solutions
Air Vent Technology reserves the right to alter specifications as part of its policy of continuous development July2015/ESE/02© E & O.E
AIR VENT TECHNOLOGY LTD 56 Reith WayPortway Industrial EstateAndoverHampshire SP10 3TY
Tel: +44(0)1264 356415 Fax: +44(0)1264 337854 Email: sales@airventtechnology.co.uk Web: www.airventtechnology.co.uk Part of the Vectaire Group of Companies
Certificate No: GB9455
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