Roof Exhaust Fan Working Principle

Intake vents located at the lowest part of the roof under.

Roof exhaust fan working principle.

Theory behind attic fans is they work on the principle of drawing hot air out of the attic and pushing it outside through the gable or roof levels. Rugged steel base with welded mounting plates allows easy installation. As the air leaves it creates negative pressure behind it sucking in cool air from below into the soffits and creating a self repeating ventilation process. You can set a multi speed fan to a lower speed when noise is a problem.

Cold air is drawn in from outside through the soffit vents or roof. As hot air rises to the top fans push the hot air out and cool down the home by drawing in the fresh air. In simple terms it replaces the hot air in the attic with fresh air from outside. Using your duct system as a whole house fan.

They can help you save a lot of money on your energy bills as you may not have to use air conditioning if the weather isn t too hot. 3 phase motors field convert from 230v to 460v. These roof ventilation fans are weatherproof to ensure long life for outdoor safekeeping. Once inside the air heats up and rises higher ultimately exiting through venting at the roof s gables through ridge vents cut into the roof s apex or other vent holes in the roof.

In general a large capacity fan running at low speed makes less noise than a small fan operating at high speed. All whole house fans should be installed with rubber or felt gaskets to dampen noise. Single phase motors are field convertible from 115v to 230v.