Blower Type Exhaust Fan

Direct drive fans have fewer moving parts than belt drive fans for less maintenance.

Blower type exhaust fan. The environment in which the system operates must also be considered to choose the right blower motor combination. Outdoors consider a totally enclosed fan cooled tefc electric motor on direct drive units or a belt drive unit with an included weather cover. Centrifugal type blower uses the centrifugal force generated by a rotating disk with blades mounted at right angles to the disk to impart movement to the air or gas and increase its pressure. The assembly of the hub disk and blades is known as the fan wheel and often includes other components with aerodynamic or structural functions.

Dirty or dusty environment a tefc motor is best for longer life and optimal efficiency. A typical axial type ventilation fan will work okay for applications that don t require long hose or duct runs. Exterior wall mount exhaust fans good when you don t have room to mount an exhaust fan inside your facility these fans attach to an outside wall and work with or without duct. Such a fan is also called a blower fan biscuit blower citation needed or squirrel cage fan because it looks like a hamster wheel.

Centrifugal fans often contain a ducted housing to direct outgoing air in a specific direction or across a heat sink. But if the exhausted air has to be moved a long distance through hose or duct work an exhaust blower will be needed to supply the proper exhaust air flow at the higher static pressures required.