Most manufacturers and contractors recommend a temperature setting between 100 and 110 degrees fahrenheit.
Attic ventilation fan 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.
That said attic fans are not the best choice for cooling attics especially if you have central air conditioning.
The fans cool the attic equalizing the temperature between the attic and outside of the home.
Providing half air change per minute will lower the temperature to about 106 degrees f.
Attic ventilators generally turn on between 90 and 110 degrees fahrenheit.
Calculations indicate that on a july day in texas a ventilation rate of one air change per minute for a typical attic using 95 degree f air will lower the peak attic temperature to about 101 degrees f.
Most attic fans operate with a thermostat that automatically turns the fan on and off based on a temperature the homeowner sets.
The reason is that attic fans depressurize attics and can rob air conditioned air from the main body of the house greatly decreasing efficiency.