Attic Cooler Than House

In summer the ideal is to have lots of air movement so the attic is as cool as possible.

Attic cooler than house.

In contrast whole house fansare most effective in the cooler temperatures of the evening and early morning. Proper attic ventilation has year round benefits. Attic fansare most effectiveduring the hottest part of the day and they are usually controlled by a timer thermostat 2 or humidistat. In many houses it is impractical to increase the insulation in the attic.

If you ve got an older home or poorly installed insulation there s a good chance upping your r value and air sealing in the attic will make your upstairs cooler and more comfortable in summer. The ideal temperature outside is at least 5 degrees fahrenheit below the desired indoor temperature. In this case the most reflective roofing material ivory ir selective metal tile is 23 4 f cooler than attic covered with dark shingles. Which way does your house face.

Insulation can only slow and not stop the energy transfer. So everything else being equal any house would benefit from a cooler attic. Attic fans perform this ventilation by pushing hot air out into the environment while also pulling fresh cool air into the attic. The third graph shows attic temperatures from the middle of the attic for several different types of roofing as well as a sealed attic.

The result is a cooler attic space with plenty of air exchange. Regardless of what the insulation level is there will be some level of energy transfer from the warmer attic to the cooler house.