Shutters open and close by static pressure which is created by the exhaust fan — they are not motorized.
n
nTo determine the proper fan for your applications (Required CFM Capacity), use the following formula:
n# of cu ft in room ÷ # of minutes per air change = Req. CFM Capacity
n
nExample:
n40,000 cubic feet ÷ 10 minutes per air change = 4000 Required CFM
Excellent commercial-grade multipurpose exhaust fan.
n
n
Rugged steel housing, with durable baked enamel finish.
