Wall Housing Mounting Arrangements
The wall housing is designed to reduce installation time and provide maximum installation flexibility. Attached accessories such as backdraft dampers, guards and weatherhoods may mount to either end. As a result a wide variety of configurations are available to accommodate the needs of the system designer.
The following information will help determine the correct arrangement required. When ordering specify arrangement by the drawing number 1A, 2A, 1B or 2B as shown in the diagrams below.
NOTE: Weatherhoods are strongly recommended for all configurations to help prevent moisture infiltration. Mounting flange, damper and guard ship factory mounted on all arrangements as shown except when ordered as a kit.
Mounting Arrangements for Interior Service Applications
The arrangements shown below are the most commonly used and should be considered first for most applications. The choice of flush interior or exterior mounting are based on appearance or space considerations.
Belts, pulleys and motors are serviced from inside the building with these arrangements. For applications requiring service from outside the building, see reverse mounting arrangements below.
Flush exterior |
| |
1A Exhaust | Interior | Wall |
|
| |
| Exhaust |
|
| Supply |
|
Exterior | Interior |
| Flush interior | |
Wall | Exterior | 2A Exhaust |
|
| |
|
| Exhaust |
|
| Supply |
1B Supply | Wall | Wall | 2B Supply |
|
|
Mounting Arrangements for Exterior Service Applications (Optional)
Reverse mounting a wall housing simply involves installing the wall housing through the wall opening in the opposite direction of the above configurations. This results in an opposite effect on fan function. An exhaust fan in a wall housing will function as a supply fan when the housing is reverse mounted.
Example: When the exhaust arrangement shown as 1A is reversed (shown as
Interior
| Flush interior | |
Wall | Exterior | |
|
| |
| Supply |
|
Exhaust
Wall | |
| |
|
|
Flush exterior
Interior | |
| |
Supply |
|
Exhaust
Wall
Wall
Exterior
EXHAUST FAN in Wall Housing with Gravity Damper and Weatherhood
Airflow
Static Pressure
Pressure Loss
CFM x 1000
SUPPLY FAN in Wall Housing with Gravity Damper and Weatherhood
Airflow
Static Pressure
Pressure Loss
CFM x 1000
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