Exhaust fans help prevent mold and mildew in bathrooms and basements, but when left on, they waste electricity. Automate this process by installing a humidity sensor to replace the fan switch.
A humidity sensor includes a manual fan switch, but if your sensor is setup correctly it should turn on and off based on the humidity in the room. With most sensors you can also tell it how long it should run when it senses a certain level of humidity.
Installing a humidity sensor is a DIY project, but you must first determine if your switch box has a neutral wire, which is required to install a device like this. Watch the video above to check out the full instructions. The Leviton humidity sensor shown runs $31.49 from Amazon.
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