Installation Guide

BIG ASS FAN 2025

3. Attach airfoils (to main fan unit)

WARNING: Disconnect power to the fan before installing airfoils.

Attach the six (6) airfoil retainers using the Airfoil Hardware. Moving clockwise around the fan hub, position the airfoil retainers as

shown. Hole A of the retainer should be positioned over top of Hole B. Do not tighten the bolts until all airfoil retainers have been

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Tighten the bolts along the outside perimeter to 29 ft·lb (39.3 N·m) using a torque wrench with a 6 mm Allen head socket. After the

outer perimeter bolts are torqued, tighten the bolts along the inner perimeter to 29 ft·lb (39.3 N·m).

Airfoil Hardware (BAF-Supplied):

a. (12) M8 x 18 mm Socket Head Cap Screw

b. (12) 8 mm Belleville Washer

Airfoil Retainer

Hole B

Hole A

Installing Airfoils (cont.)

Belleville Washer