Canarm Exhaust Fans with Aluminum Louver Shutters
Excellent commercial-grade multipurpose exhaust fan.
• Rugged steel housing, with durable baked enamel finish.
• Totally enclosed ball-bearing motor.
• Heavy-gauge aluminum blades.
• Thermal overload protection.
• 115/230V: CF1755, CF1760, CF1762, CF1770.
• 115V: CF1750, CF1765.
Shutters open and close by static pressure which is created by the exhaust fan — they are not motorized.
To determine the proper fan for your applications (Required CFM Capacity), use the following formula:
# of cu ft in room ÷ # of minutes per air change = Req. CFM Capacity
40,000 cubic feet ÷ 10 minutes per air change = 4000 Required CFM