Why do I need a bathroom exhaust fan?

Exhaust fans with a UL listing for installation over a tub or shower on a GFCI circuit can be installed over a tub or in a shower.  Units that include any type of heating fuction to them are not able to be installed over a tub or shower. Check you specific product for more information.

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When the exhaust fan ventilates air out of the room, the amount of air ventilated needs to be replaced, this is called make-up air. If there is not enough make up air, the exhaust fan's performance will be diminished. Typically make up air for bathroom exhaust fan's is accomplished by a gap cut at the bottom of the door entering into the bathroom.

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1. Check that there is power to the exhaust fan. The most common trouble is the circuit breaker is off or there is a blown fuse.2. Turn off power to the exhaust fan and check that all wires are properly connected. Refer to your specific model's installation instructions for proper wiring instructions.

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This is probably attributed to one of the following:1. The motor is loose - turn off power to the unit, remove the grill and check that all screws are fully tightend around the motor. 2. The fan blade is hitting the housing of the unit - turn off power to the unit, remove the grill and check that the blade is fully inserted on the motor shaft.

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Although there are many factors that will determine what size exhaust fan you need, as a general rule, take the length times the width of your bathroom to come up with the square footage. Assuming the ceiling height is 8 feet, take the square footage and multiply it by 110% (or 1.1). This will give you the amount of ventilation needed for your bathroom. For instance a 10 foot by 10 foot bathroom with 8 foot ceilings would have a square footage of 100 sq. ft., take 100 times 110% to get 110. You ...

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