Attic Fan Temperature And Humidity Settings

Most attic fans operate with a thermostat that automatically turns the fan on and off based on a temperature the homeowner sets.

Attic fan temperature and humidity settings.

The results are that the attic temperature is close to the outside temperature but the relative humidity is significantly higher in the attic than either the indoor or outdoor readings. Our answer attic ventilators generally turn on between 90 and 110 degrees fahrenheit. The reason is that attic fans depressurize attics and can rob air conditioned air from the main body of the house greatly decreasing efficiency. This prevents snow from melting on your roof and freezing when it hits the cold gutter.

Of course some environments are much hotter than others so this will be the perfect time to measure out how warm your attic will get during the most heated of seasons. The normal indoor humidity range in winter should be 15. Most manufacturers and contractors recommend a temperature setting between 100 and 110 degrees fahrenheit. Humidity settings are another issue that can make or break the performance of your heating and cooling systems and your attic ventilation.

The fans cool the attic equalizing the temperature between the attic and outside of the home.