As your attic heats up in the summer, the heat will also heat the interior of your house from the ceiling down. One way to solve this problem is to cool your attic with an attic fan which pulls in fresh air through the roof vents and forces hot attic air out. This exchange of air can make quite a difference in keeping your attic and your house cool in the summer even if your attic is insulated or you have air conditioning. First, decide how you will mount the fan, and the size of fan that you need… and then choose the appropriate model. Before working make sure to turn off the electrical circuit you will be working on.