At temperatures of 150 f or more that s a lot of heat sitting there in that plywood or osb.
Attic fan temperature setting florida.
When the temperature within the attic reaches a set point the fan will turn on and.
The main way that heat gets into the attic is through radiation.
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 attic fans operate with a thermostat that automatically turns the fan on and off based on a temperature the homeowner sets.
Many people buy an attic fan which cost around 50 for standard electric gable fans to upwards of 350 for a high end solar attic fan and one of the first things they have to determine is the proper temperature to set the attic fan thermostat.
That said attic fans are not the best choice for cooling attics especially if you have central air conditioning.
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.
If your attic soars above 100 degrees and reaches the 150 mark its time to consult professionals.
When it comes to adjusting the thermostat of your attic s fan it s best to adjust it to approximately 90 to 95 degrees.
In particularly hot climates set the temperature higher to keep the fan from running for extended periods of time.
That hot roof deck radiates heat down into the attic.
It essentially pulls that cooled air through cracks and crevices in the attic floor and also through holes that allow for wires and pipes.
The reason is that attic fans depressurize attics and can rob air conditioned air from the main body of the house greatly decreasing efficiency.
What temperature should attic fan be set at.
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.
Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures.
As mentioned earlier adjustable thermostats give you the ability to simply set a dial and forget about the fan.
Attic ventilators generally turn on between 90 and 110 degrees fahrenheit.
