Frame opening as follows: 37” x 37”.
Allow two inches of clearance around opening. Mount fan in opening securing with proper screws in prepunched mounting holes in frame of shutter.
To insure proper automatic operation, install fan level and square, do not twist or tilt shutter frame, and attach mounting screws at a 90 degree angle. 36 inch wall exhaust fan in Houston and Austin .
Louver mount direct drive exhaust fans with guard and power cord