What would be some reasons for an exhaust fan not removing the moist air from the area?
Insufficient make up air into the room being exhausted Too small a device for the size room being exhausted Incorrect size of duct used to exhaust room Obstruction in the duct Roof or wall cap not opening correctly Incorrect position of product in room
What accounts for "make up air" into a room?
Make up air is the air needed to replace air being exhausted by the fan. Inadequate make up air will result in poor performance of the product. For a bathroom installation, make up air is generally provided by a gap at the bottom of the bathroom door. A 1/2" gap between the bottom of the door and the floor or carpet is sufficient for most installations. Large CFM fans may require additional make up air.
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This Ultra Silent Series bathroom fan allows you to ventilate your bath space quietly. Features a light and handy night light. 4" ducting. Easy installation. ENERGY STAR rated.
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Broan QTR140L UltraSilent Bathroom Exhaust Fan with Light and Nightlight 140 CFM, 2.0 Sones.
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This unit helps vent water moisture, household chemicals and even gases from hairsprays and perfumes with an 70 cubic feet per minute fan.
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