When you do not have AC, Allen Chenault, heating, ventilation and AC expert at AC's Heating & Air says, 'I always recommend ...

This can also be improved by the addition of an attic fan, as it will allow you to create an upwards flow of air when it's too warm inside, or block off air from leaving your roof when it's too cool.

Remington Solar reports that solar attic fans can combat rising energy costs and heat, offering relief for homeowners as temperatures soar and bills rise.