I doubt you even need an attic fan if that s the case.
Roof fan thermostat setting.
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This temperature can be anywhere between 80 to 120 degree fahrenheit.
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When the temperature drops below that set temperature it is again switched off.
Humidity settings are another issue that can make or break the performance of your heating and cooling systems and your attic ventilation.
Generally you need to set only one temperature for the thermostat.
I think the normal average setting is 110 or higher if you are in a hot climate.
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The normal indoor humidity range in winter should be 15.
Most manufacturers and contractors recommend a temperature setting between 100 and 110 degrees fahrenheit.
But if your attic rarely breaks 100 then i guess that s the temp to set it at.
Most attic fans operate with a thermostat that automatically turns the fan on and off based on a temperature the homeowner sets.
Ideally your attic space will stay in the same temperature range 105 115 degrees and the only true way to tell is to stick a thermometer into your attic overnight and check the reading every couple hours.
As mentioned earlier adjustable thermostats give you the ability to simply set a dial and forget about the fan.
When the temperature within the attic reaches a set point the fan will turn on and.
Most manufacturers recommend setting your attic fan thermostat between 105 115 degrees and monitoring how often and how long the fan runs to adjust the setting for your home.
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When that temperature is reached or exceeded the thermostat ensures that the attic fan is switched on.