Proper Attic Fan Temperature Setting

As mentioned earlier adjustable thermostats give you the ability to simply set a dial and forget about the fan.

Proper attic fan temperature setting.

When the temperature within the attic reaches a set point the fan will turn on and. If your attic soars above 100 degrees and reaches the 150 mark its time to consult professionals. Most manufacturers and contractors recommend a temperature setting between 100 and 110 degrees fahrenheit. 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.

I inspected a house recently that had the attic fan temperature settings at 115 degrees and 120 degrees one at each end of the house. Attic ventilators generally turn on between 90 and 110 degrees fahrenheit. In particularly hot climates set the temperature higher to keep the fan from running for extended periods of time. 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.

Most attic fans operate with a thermostat that automatically turns the fan on and off based on a temperature the homeowner sets. 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 range on the fan is from 50 to 130 degrees f. The reason is that attic fans depressurize attics and can rob air conditioned air from the main body of the house greatly decreasing efficiency.

I ve seen recommended settings to be any where from 95 degrees to 105 degrees. It essentially pulls that cooled air through cracks and crevices in the attic floor and also through holes that allow for wires and pipes. That said attic fans are not the best choice for cooling attics especially if you have central air conditioning.