Attic Fan Temperature Setting Florida

That hot roof deck radiates heat down into the attic.

Attic fan temperature setting florida. Attic ventilators generally turn on between 90 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. Most manufacturers recommend setting your attic fan thermostat. 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.

Most manufacturers and contractors recommend a temperature setting between 100 and 110 degrees fahrenheit. Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures. At temperatures of 150 f or more that s a lot of heat sitting there in that plywood or osb. In particularly hot climates set the temperature higher to keep the fan from running for extended periods of time.

When it comes to adjusting the thermostat of your attic s fan it s best to adjust it to approximately 90 to 95 degrees. Some of it will go directly into the attic air by conduction but that s a small amount because air isn t a good conductor. On one hand the national renewable energy laboratory said attic ventilation reduces attic temperature 10 to 25 degrees and slows the transfer of heat into the living space on the other the florida solar energy center university of central florida found that attics with nominal natural ventilation and r 19 ceiling insulation do not need powered vent fans. When the temperature within the attic reaches a set point the fan will turn on and.

Attic fan thermostat setting. The main way that heat gets into the attic is through radiation. It essentially pulls that cooled air through cracks and crevices in the attic floor and also through holes that allow for wires and pipes. Most attic fans operate with a thermostat that automatically turns the fan on and off based on a temperature the homeowner sets.

That said attic fans are not the best choice for cooling attics especially if you have central air conditioning. If your attic soars above 100 degrees and reaches the 150 mark its time to consult professionals.