PRE-INSTALLATION CHECKLIST
I have the appropriate mount to accommodate the roof pitch and my building structure.
Big Ass Fans can only be mounted to I-beams or angle irons. Do not directly mount the fan to single
purlins, trusses, or bar joists. Consult a structural engineer for mounting methods not covered in
this manual.
A structural engineer approved the mounting structure.
The mounting structure must be able to withstand the torque forces generated by the fan. The
largest Big Ass Fan generates up to 300 ft·lb (406.7 N·m) of torque during operation.
I am familiar with the function of the safety cable.
If my fan’s extension tube is 4 ft (1.2 m) or longer or if the fan is installed near any building
fixtures, I will secure the fan with the provided guy wires as a safety measure.
The fan will be installed so that the airfoils are at least 10 ft (3.05 m) above the floor.
The fan will be installed so that the airfoils have a minimum of 2 ft (0.61 m) of clearance from
obstructions and the building structure.
The distance of the fan from the obstruction should be measured from the edge of the winglets to
the obstruction.
The fan will be installed so that it is not subjected to high winds such as from an HVAC system
or near a large garage door.
If the fan is mounted at the same level or higher than a diffuser, the winglets must be at a distance
that is at least 1x the measure of the fan’s diameter. If the fan is mounted at the same height or
below a diffuser, the winglets must be at a distance that is at least 2x the measure of the fan’s
diameter.
The distance between multiple fans must be at least 2.5x the fans’ diameter when measured
from the centers of the fans.
The upper mount is the correct size for the I-beam.
The airfoils and other fan components are those that were shipped with the motor unit.
If installing multiple fans, do not mix and match fan components.
The supply power circuit is appropriate for the VFD, and power wiring is routed to the site of the
fan and the controller installation.
See the specification label on the fan for power requirements.
