Belt Driven Attic Fan Rattle

Air outlet openings from the attic are necessary for proper operation.

Belt driven attic fan rattle.

It allows joist in or joist out installation for ceiling mount. In a belt driven configuration the motor exists independently of the fan blades and at least one belt sometimes more connects the motor to the fan s moving parts. See chart below net free. Quite often it works out cheaper to upgrade to a more quiet energy efficient model.

It is ul listed with thermal overload protection. The cx24bdm 2spd 24 inch cool attic belt drive whole house fan offers an energy efficient way to trim cooling costs while keeping your entire home more comfortable and is belt driven for quieter operation. Generally such fans are cheaper than direct drive fans of comparable size. Cool attic 24 in steel single belt drive whole house fan.

Open area of a belt drive whole house fans. Master flow 30 in steel single belt drive whole house fan. The whole house belt drive pulley allows quieter operation and includes a 2 speed wall switch. Belt driven fans offer greater flexibility in terms of rpm speed.

A minimum attic exhaust opening of 1152 square inches for the 30bwhfs or 1584 inches for the 36bwhfs is required for your whole house fan. Attic fans in which the blades are directly connected to the motor usually cannot be repaired due to the lack of availability. It is suitable for a home with a 2 000 3 000 square foot attic.