Mounting Options
10
EXHAUST FAN in Wall Housing with Gravity
Damper and Weatherhood
SUPPLY FAN in Wall Housing with Gravity
Damper and Weatherhood
Airflow
Airflow
Louver Mounting
Where an exterior louvered appearance is desired, a variety of louvers
can be used in conjunction with the wall housing or wall collar as shown.
However, since louver free area is less than half of the wall opening,
pressure drop across the louver must be considered when specifying the
fan. The graph below shows louver pressure drop for Greenheck model
EDJ-430 based on CFM and fan size.
For additional louver information visit www.greenheck.com or refer to the
catalog Louver Products: Severe Duty, Stationary, Operable.
INSIDE OUTSIDE
10 inch (254mm)
minimum*
*Can be smaller based on fan size
See section on page 12 about water ingress and mitigation on supply fans.
0
0.1
0.2
0.3
0.4
0.5
0.6
0 10 20 30 40 50 60 70
20"
72"
60"
24" 30"
36"
42"
48"
54"
Volume
Static Pressure Loss
(inches wg)
Static Pressure Loss for Wall Housing, Backdraft Damper and 45 Degree Weatherhood
0 10 20 30 40 50 60 70
CFM x 1000
Volume
(inches wg)
0
0.1
0.2
0.3
0.4
0.5
0.6
Static Pressure Loss for Wall Housing, Backdraft Damper and 90 Degree Weatherhood
20"
24"
60"
30"
36"
42"
48"
54"
72"
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