My Attic Gets To 160 Degrees In The Summer
Hello david i sent this to your other email to.
My attic gets to 160 degrees in the summer. The whole house fan is installed inside the attic between the living space and ceiling. And it can cause your air conditioner to work harder than it needs to and send your energy bills soaring with the temperature. 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. I have a shop in my attic for some of my hobbies and it get s very hot in the summer.
It helps to cool your home temperatures and the attic by approximately 30 degrees. Whole house fans work on the principle of removing the hot and humid air out of the house. My next effort with those ducts is to air seal them the best i can and replace the 56 year old insulation with r6 or better. I have recently added a ridge vent to my roof and have also been taking temperature readings.
Hang pencil and paper next to the thermometer and record the outdoor and attic. Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures. What should be the difference between outside inside temperature of an attic on a summer day versus a winter day. An unventilated attic can reach 150 degrees in the heat of summer 50 degrees higher than it should be.
Hot summer weather poses the opposite problem for maintaining recommended attic temperatures. The attic is a huge determinant in keeping your entire home cool so the first place to start cooling your home should be the attic. The reflective roof already relieves a considerable heat load off the existing ducts so air sealing and better insulation will be icing on the cake for them. I have large attic with ridge vents and screened vents at either end of the attic to maintain air flow.
Should there be a difference between a 78 degree day and a 98 degree day. We had our home resided this summer. At that time we started hearing noises in the attic. 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.
Within the attic insulation is a must. In my case it is not practical to get my ducts out of the attic. A thick insulation between 14 to 18 inches will help reduce heat from entering your home. Hang an outdoor thermometer in your attic making sure its range reaches at least 130 degrees fahrenheit.
I live in northern virginia hot humid climate in the summer and use heat pumps to heat and cool my house throughout the year. The warm air escapes through the attic and to the attic vents allowing the circulation of chilly air from the windows.