18
6022221B - Direct Drive HVLS Fan UM
November 2022
Installation Considerations
* Non-standard obstructions may require additional length to the extensions. Please consult the
factory for additional clarification on non-standard obstructions and assistance with fan placement
and extension selection.
Failure to maintain exclusion zones outlined in this section could result in fan failures, including
blade separation, which could result in death or serious injury.
DO NOT operate fans when physical obstructions or HVAC air flows extend into exclusion zones.
Regularly inspect fans to ensure exclusion zones remain clear of interference before operating
the fan.
All fan blade parts must be greater than 3’ from all obstructions including lights, cables, sprinklers,
and other building components and greater than one half (1/2) fan diameter from any wall to the end
of the blade.
ROOF ANGLES
For roof angles in excess of 20°, consult the factory. The extension lengths shown are minimum
recommendations only, based solely off roof pitch and fan diameter. Other considerations, such as
placement of lights, sprinkler systems, HVAC systems, etc., must be evaluated when determining
extension requirements. OSHA requirements state that fan blades must be at minimum 10’ above the
floor.
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