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Master Flow Standard Timer, 115 V, 60 Hz Frequency, Vertical Mounting, Steel Housing Material, Dimensions: 2-1/2 in D, Suitable for: Fans, Includes: Plastic Knob, Wallplate
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Master Flow Automatic Fan Shutter, Rough Opening Size: 33-3/4 in L X 28-1/4 in W, Aluminum, Enamel, 35-3/4 in L, 30-1/4 in W
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Master Flow? whole house fans are smart energy savers for any climate where cooling costs are a concern. They help beat the heat by forcing hot air out of the home while bringing in cooler outside air. Whole house fans are an important part of a complete home ventilation system.
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