Cooling Your Home With a Solar Attic Fan

Although the concept is somewhat controversial, a properly installed solar attic fan could help cool your home by cooling your attic.

Attic fan diagram
If outside temperatures are in the 90- to 110-degree range, the attic temperature can climb to 150 degrees. Even 105-degree outside air, when circulated through a 140-degree attic, will lower the temperature.
ANIL RAO/RS MEANS