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PNEG-1872
36" Direct Drive Box Fans
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3. Direct Drive Box Fans Assembly Instructions
Rough in Opening
These are the exact sizes, including the protruding screw heads, for the openings for the fans. They do
not include any extra clearance for installation. Any extra clearance should be added as desired to these
numbers for frame size opening. Weights given are the maximum weight prior to shutter installation.
36" Motor and Motor Mount/Upright Assembly Instructions
Use four (4) #10-32 star lock nuts and eight (8) 3/16" back up washers (four (4) on each side of the upright)
to secure motor to uprights.
Figure 3A
Model of Fan
Rough Opening
Maximum Weight (Less Shutter)
36" Box Fan
40-1/2" Wide x 40-1/2" Tall
(102.87 cm x 102.87 cm)
115 lbs. (52.3 kg)
Be careful, there are many sharp edges that can cut while assembling the fan.
Wear protective clothing and gloves.
Motor mount uprights