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Bathroom Fans

To keep humidity and smells out of the rest of the house, you should have a working bathroom fan that exhausts air to the outside. In some communities, if the bathroom does not have a window, it is a code requirement.

When shopping for a bathroom fan, consider these:

  • capacity - measure the volume of air in the room (square footage times the height of the ceiling) and then divide by 15; the fan should be able to move at least this amount of air per minute (described as CFM), more if you want to clear the air faster. If the room vent is covered by zoning regulations, make sure that the fan meets the regulations.
  • noise level - generally, the more air the fan moves, the louder it will be; noise generated by a bathroom fan is not considered a major concern unless it is extremely loud. Keep in mind that too quiet of a fan can be a drawback for two reasons: the fan may accidentally be left running and some noise (referred to as "white noise") is desirable to mask other sounds.
  • mounting size and vent connection - make sure that there is room for the fan to be installed in the ceiling or wall along with the ventilation pipe.

Don't forget that the bathroom needs a source of air to replenish the air drawn out by the fan or else the fan will not work properly.

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