Attic Cooler Than House

Attic fansare most effectiveduring the hottest part of the day and they are usually controlled by a timer thermostat 2 or humidistat.

Attic cooler than house.

Regardless of what the insulation level is there will be some level of energy transfer from the warmer attic to the cooler house. In many houses it is impractical to increase the insulation in the attic. In summer the ideal is to have lots of air movement so the attic is as cool as possible. Maybe but not always.

Which way does your house face. The third graph shows attic temperatures from the middle of the attic for several different types of roofing as well as a sealed attic. Insulation can only slow and not stop the energy transfer. Attic fans perform this ventilation by pushing hot air out into the environment while also pulling fresh cool air into the attic.

So everything else being equal any house would benefit from a cooler attic. In contrast whole house fansare most effective in the cooler temperatures of the evening and early morning. 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. In this case the most reflective roofing material ivory ir selective metal tile is 23 4 f cooler than attic covered with dark shingles.

Proper attic ventilation has year round benefits. The result is a cooler attic space with plenty of air exchange.