Standard Horizontal Mounting Option
Horizontally mounted fans are available for applications requiring vertical airflow. Typical applications include mounting fans in ductwork or plenums as transfer fans or suspending them from the ceiling in a wall housing for use as recirculation fans. Both belt and direct drive fans can be horizontally mounted. Motors can be mounted on top or on bottom with airflow up or down. Specify configuration best suited for access and service.
Horizontally mounted fans are put under different stresses than fans mounted in a wall. Construction modifications are required depending on motor location (top or bottom) and whether the fan is belt or direct drive.
These modifications may include the following:
A - Grooved shaft with snap rings (belt drive fans)
B - Motor pulley retaining hardware (belt drive fans with motor on bottom)
C - Reinforcing angles on fan panel - not shown (all fans with motor on bottom)
D - Propeller retaining hardware (direct drive fans with motor on top)
A
Supply Fan
Motor on Top
Air Blowing Upward
Exhaust Fan
Motor on Top
Air Blowing Downward
Airflow
| Airflow |
Guarding is strongly | D - Retaining Hardware |
recommended |
|
| Hangers by others |
| |
Motor on Bottom | Airflow | Motor on Bottom | |
Air Blowing Upward | Air Blowing Downward | ||
Airflow | |||
(Shown as suspended | (Shown as suspended | ||
| |||
installation with fan |
| installation with fan | |
mounted in wall housing.) |
| mounted in wall housing.) | |
| Wall |
| |
| Housing |
| |
| Exhaust Fan | Supply Fan | |
| Guard or Diffuser |
| |
| B |
|
NOTE: Protective guarding is also required below the fan for safety. When guarding is not ordered with the fan, it must be supplied by the installer. When specifying a fan for horizontal mounting, the motor location (top or bottom) and airflow (upward or downward) are required information.
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