The normal indoor humidity range in winter should be 15 to.
Attic fan thermostat setting winter.
How to test a hardwired attic fan.
In summer the thermostat operates the fan when the attic temperature reaches a preset level usually 90 to 95 degrees f.
The ideal way to control the operation of an attic fan is with a thermostat and a humidistat.
When it comes to adjusting the thermostat of your attic s fan it s best to adjust it to approximately 90 to 95 degrees.
You should test your attic fan annually and preferably in the spring time first few days in of.
Likewise adjustable thermostats will shut the fan off.
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Most manufacturers and contractors recommend a temperature setting between 100 and 110 degrees fahrenheit.
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When the temperature within the attic reaches a set point the fan will turn on and start venting the heated air cooling the attic space.
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.
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I test mine every year.
In winter the humidistat operates the attic fan when the relative humidity exceeds a preset level usually 40 to 50.
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