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BETA VERTICAL DISCHARGE COWLS
ROOF MOUNTED FANS
D
© FANTECH
2016
D-12
HOW TO ORDER
The vertical discharge units shall be of the RVV series as
designed and manufactured by Fantech Pty Ltd.
Each unit shall incorporate gravity operated, butterfly backdraft
shutters and be constructed from UV-stabilised plastic,
fibreglass and/or powder-coated galvanised steel.
Steel components shall have a corrosion resistant finish.
Select the model required to handle the air quantity nominated
from the performance graphs.
SUGGESTED SPECIFICATION
DIMENSIONS
A
B
B
D
C
Model
RVV.
Min. *
Air flow
m
3
/s
Throat
area
m
2
A
B C D
App.
wt.
kg
App.
vol.
m
3
1
0.66 0.11 400 50 95 440 4 0.13
2
1.02 0.17 510 50 85 450 7 0.22
3
1.62 0.27 670 50 85 560 15 0.40
4
2.46 0.41 780 100 85 700 25 0.80
5
3.80 0.53 900 100 85 760 35 1.16
6
5.70 0.82 1100 100 85 865 45 1.70
* Air flow at which gravity-air operated backdraft shutters will open fully,
and achieve acceptable discharge velocities.
Dimensions, mm
Maglok
®
Ref.
J-8
ANCILLARY EQUIPMENT
DESCRIPTION
The Beta Vertical Discharge Vents are ideal in ducted systems
where the fan is mounted remotely to the unit. They enable the
vertical discharge of air from a mechanical exhaust system,
while providing protection from rain when not in use.
There are 6 sizes in the range handling air flows from 0.4 to
5.70 m
3
/s.
Typical Applications
Used as the discharge point where the fan is mounted
elsewhere in the system yet vertical discharge exhaust is
required. Ideal in applications such as shopping centres,
office buildings and sports centres. The pressure loss through
the vent must be added to the system pressure loss before
selecting the fan.
Features
O
Fitted with reliable gravity operated, butterfly backdraft
shutters.
O
Lightweight but sturdy construction.
O
Enables the vertical discharge of air while preventing rain
from entering building.
O
Can be mounted at angles up to 30°.
Construction
Sizes 1 to 4 - Bases are made of UV-stabilised plastic with a
fibreglass windband.
Sizes 5 & 6 - Bases are made of fibreglass with a
powder-coated galvanised steel windband.
Fitted with gravity operated, butterfly backdraft shutters.
Steel components have a corrosion resistant finish.
Special notes
Beta Vertical Discharge Vents are designed for relatively high air
discharge velocity. At low discharge velocities, rain could enter
the building. For these types of application an Alpha Relief Air
Vent is recommended. See page
D-10
.
For any application where prevailing winds may lift the butterfly
shutters of the Beta Vertical Discharge Vent, we recommend the
fitting of Magloks ® . See page
J-8
for details.
Ensure the hinge of the butterfly shutters
point down the slope of the roof.
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to view more
information online.