The reason is that attic fans depressurize attics and can rob air conditioned air from the main body of the house greatly decreasing efficiency.
Attic ventilation fan temperature.
Most manufacturers and contractors recommend a temperature setting between 100 and 110 degrees fahrenheit.
What temperature should attic fan be set at.
Providing half air change per minute will lower the temperature to about 106 degrees f.
That said attic fans are not the best choice for cooling attics especially if you have central air conditioning.
Most attic fans operate with a thermostat that automatically turns the fan on and off based on a temperature the homeowner sets.
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.
When it comes to adjusting the thermostat of your attic s fan it s best to adjust it to approximately 90 to 95 degrees.
One static vent style is the turbine vent which uses wind to power its enclosed fan all it takes is a light breeze to rotate the blades and suck heat out of the attic view example on the home.
Attic ventilators generally turn on between 90 and 110 degrees fahrenheit.