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ROOF MOUNTED FANS
D
© FANTECH
2016
D-66
FLANGED VERTICAL DISCHARGE COWLS
DESCRIPTION
The Flanged Vertical Discharge Cowls are ideal in ducted
systems where the fan is mounted remotely below roof level.
They work together with a mechanical exhaust system while
preventing the entry of rain when not in use. These durable and
robust units are designed for mounting on circular duct and flue
discharges using a flange.
There are 11 sizes in the range handling air flows from 0.2 to
55 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 cowl must be
added to the system pressure loss before selecting the fan.
Features
O
Enables the vertical discharge of air while preventing rain
from entering building.
O
Steel components have a corrosion resistant finish.
O
Fitted with reliable gravity air-operated backdraft shutters.
Construction
Backdraft shutters: Sizes 40 to 80 - Made from aluminium.
Sizes 100 & 180 - Made from galvanised
sheet steel.
Cowls are of galvanised steel.
Fitted with gravity air-operated backdraft shutters.
Steel components have a corrosion resistant finish.
Special Notes
Flanged Vertical Discharge Cowls are designed for relatively high
air discharge velocity. At low discharge velocities, rain could
enter the building. For these types of applications an Alpha Relief
Air Vent is recommended. See page
D-10.
For any application where prevailing winds may lift the shutters of
the Flanged Vertical Discharge Cowl, we recommend the fitting
of Magloks
®
. See page
J-8
for details.
Ensure the hinge of the shutter points down the slope of the roof.
SUGGESTED SPECIFICATION
The vertical discharge cowls shall be of the RVF series as
designed and manufactured by Fantech Pty Ltd.
Each unit shall incorporate gravity air-operated backdraft
shutters that are constructed from aluminium or galvanised
sheet steel.
Cowls are of galvanised steel and steel components shall have a
corrosion resistant finish.
HOW TO ORDER
Select the model required to handle the air quantity nominated
from the performance graphs.
DIMENSIONS
Scan the QR Code
to view more
information online.
C x DØ Holes
on E PCD
AØ
BØ
FØ
G
H
* It is recommended that
RVF040-080 selections
exceed 30Pa to maintain
adequate discharge
velocities.
Model
RVF..
AØ* BØ C DØ E FØ G H
App.
wt.
kg
App.
vol.
m
3
040
400 485 8 12 450 656 300 380 19 0.12
050
500 585 12 12 560 756 350 430 25 0.19
056
560 645 12 12 620 816 380 460 28 0.24
063
630 715 12 12 690 886 400 480 32 0.29
071
710 795 16 12 770 966 450 530 37 0.39
080
800 885 16 12 860 1056 500 580 44 0.51
100
1000 1106 16 15 1070 1258 600 680 61 0.85
125
1250 1356 20 15 1320 1508 700 780 85 1.38
140
1400 1526 20 15 1470 1658 800 880 117 1.90
160
1600 1730 24 19 1680 1854 900 980
157
2.64
180
1800 1960 24 19 1880 2053 1000 1080
195
3.57
Dimensions, mm
* Nominal Duct Diameter