Roof Exhaust Fan Working Principle

Rugged steel base with welded mounting plates allows easy installation.

Roof exhaust fan working principle.

Cool air in hot air out attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. These roof ventilation fans are weatherproof to ensure long life for outdoor safekeeping. Using your duct system as a whole house fan. In simple terms it replaces the hot air in the attic with fresh air from outside.

Rolled venturi surrounds fan within the 18 gauge galvanized steel wind band. You can set a multi speed fan to a lower speed when noise is a problem. Attic fans are installed at the roof level of your home to regulate the heat level. 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.

Intake vents located at the lowest part of the roof under. 3 phase motors field convert from 230v to 460v. 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. 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. 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. In general a large capacity fan running at low speed makes less noise than a small fan operating at high speed.