Whole attic exhaust fans are specially designed to cool your home at night using the outside air when the heat of the day has passed, and the temperature outside has dropped enough to keep you comfortable. Although whole house fan has existed for a long, long time, their raid into the mainstream is only recent.
The main advantage of using a Whole house attic fan instead of an air conditioner is to save energy.
For you to make use of Attic exhaust fan, you have to mount it above a rectangular grille in the ceiling of a central halfway called the attic floor. Before you switch on the Cool attic whole house fan, you must ensure that the windows are opened. You can go after that close the window when the fresh air has been evenly distributed in the room.
The activated Attic exhaust fan pulls unpleasant air out from the room and allows the more cooling outdoor air to enter through the windows. They are relatively sturdy and rated between 2,000 cfm and 6,000 cfm which merely means they get the room filled with cool air very quickly.