That said attic fans are not the best choice for cooling attics especially if you have central air conditioning.
Attic exhaust fan temperature setting.
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.
Likewise adjustable thermostats will shut the fan off.
Unfortunately it is impossible to state a single number as the correct temperature.
What temperature should attic fan be set at.
When it comes to adjusting the thermostat of your attic s fan it s best to adjust it to approximately 90 to 95 degrees.
The reason is that attic fans depressurize attics and can rob air conditioned air from the main body of the house greatly decreasing efficiency.
In general most homeowners should set their attic fan temperature to in between 90 and 110 degrees fahrenheit.
Most manufacturers and contractors recommend a temperature setting between 100 and 110 degrees fahrenheit.
In particularly hot climates set the temperature higher to keep the fan from running for extended periods of time.
Attic ventilators generally turn on between 90 and 110 degrees fahrenheit.
A house in sweltering new orleans should have a completely different temperature setting than a home in northern seattle.
Most attic fans operate with a thermostat that automatically turns the fan on and off based on a temperature the homeowner sets.
It essentially pulls that cooled air through cracks and crevices in the attic floor and also through holes that allow for wires and pipes.