Attic Fan Temperature Setting

At what temperature do you set an attic fan thermostat.

Attic fan temperature setting.

Most attic fans operate with a thermostat that automatically turns the fan on and off based on a temperature the homeowner sets. 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. The default setting for the thermostat is 110 degrees. 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.

Most manufacturers and contractors recommend a temperature setting between 100 and 110 degrees fahrenheit. 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 ventilators generally turn on between 90 and 110 degrees fahrenheit. I installed 2 new attic fans in my house in north carolina.

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. If your attic soars above 100 degrees and reaches the 150 mark its time to consult professionals. 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. Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures.

What temperature should attic fan be set at. That said attic fans are not the best choice for cooling attics especially if you have central air conditioning. With an attic fan you can cool the attic to the same temperature as it is outside greatly reducing the house from heating as quickly. Likewise adjustable thermostats will shut the fan off.

In particularly hot climates set the temperature higher to keep the fan from running for extended periods of time.