I live in northern virginia hot humid climate in the summer and use heat pumps to heat and cool my house throughout the year.
My attic gets to 160 degrees in the summer.
The whole house fan is installed inside the attic between the living space and ceiling.
The warm air escapes through the attic and to the attic vents allowing the circulation of chilly air from the windows.
I was surprised because it was 100 degrees outside heat index was 108 and the attic heat would have been much much hotter guessing 130 140.
Dropping the temperature from 120 150 degrees to roughly the same as the outside temperature will save you enough on your power bill to offset the purchase and installation charge.
Attics can reach temperatures of 150 to 160 degrees f during a summer day although outside air temperatures are only 95 to 97 degrees f.
An unventilated attic can reach 150 degrees in the heat of summer 50 degrees higher than it should be.
The top reason your attic is so hot is because of ventilation.
Excessive heat deteriorates items you store in the attic and can cause moisture.
What temperature should attic fan be set at.
I have a shop in my attic for some of my hobbies and it get s very hot in the summer.
An overheated attic can bake asphalt shingles on the roof and cause them to deteriorate.
But it is time to take away the heating power of the attic.
It helps to cool your home temperatures and the attic by approximately 30 degrees.
You have control over the temperature of your attic.
Whole house fans work on the principle of removing the hot and humid air out of the house.
The cooling load for a home air conditioner depends on the difference in temperature between the inside and outside air and reduction of attic temperatures from 155 degrees to 105 degrees f will result in a significant reduction in cooling load.
They have done much of their testing in las vegas and phoenix where conditions are the worst and 150 degree attic temperatures are common.
Hello david i sent this to your other email to.
So take a stand against attic heat by following a few simple steps.
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.
When it comes to adjusting the thermostat of your attic s fan it s best to adjust it to approximately 90 to 95 degrees.
A hot attic is bad for several reasons.
High temperatures inside your attic shorten the life span of shingles.
A good attic fan might cost you in the range of 150 and having it installed might cost you the hourly rate of a certified electrician.
At that time we started hearing noises in the attic.
We had our home resided this summer.
I have large attic with ridge vents and screened vents at either end of the attic to maintain air flow.