Why you need a bathroom fan with a humidity sensor

Humidity sensors help control humidity in bathrooms, but what exactly are they, and how do they work?

Humidity sensors detect the level of humidity in a room by measuring the amount of water vapor present. These devices can then activate or deactivate based on the levels detected. In addition, some models include adjustability for humidity levels that cannot be reached with either on/off switches, such as excessively hot or cold weather, or automatic operation once set temperatures have been reached.

Ideally, a bathroom fan with a humidity sensor is installed in a bathroom where different activities occur at separate times throughout the day. For example, when most people tend to shower, put makeup on, etc., it may be beneficial to run the fan to exhaust the moist air during daylight hours. When the fan is turned off during these times, humidity may build up when activities that add moisture to the air are no longer taking place. At night when most people sleep, it may be beneficial to turn the fan on with a humidity sensor at a low-speed setting in order to minimize noise while still providing adequate ventilation.



The degree of humidity control will depend on several factors, including how often and how long the bathroom is occupied; type of humidification device in use (if any); size and location of the bathroom; exterior conditions unique to your local weather where your home is located; etc…

If you do not fully understand how a bathroom fan with a humidity sensor functions, you might want to try multiple bathroom fan settings. One option is to turn the bathroom fan on manually when you go in the bathroom; another is to set the humidity sensor with a low-speed setting (if available). Finally, if you want to ensure that it will be off, simply switch the unit to ‘off’ when not in use.



Check out our picks of the best bathroom fans with a humidity sensor

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