Attic Fan Belt Vs Direct Drive

When compared to belt drive fans which require belts sheaves and bushings direct drive is just plain simpler and maintenance folks tend to lean toward direct drive for daily maintenance.

Attic fan belt vs direct drive.

The second pulley is connected to a shaft that drives the fan propeller. Unlike the belt driven fans in case of a direct drive fan there is lesser energy loss. Direct drive fans have no power transmission loss since the propeller is directly connected to the motor shaft. Direct drive fans require fewer parts and thus usually less maintenance.

Cool attic belt drive whole house fan 36in 9 700 cfm model cx36bd2spd. A well balanced direct drive is far quieter than belt. Belt drive whole house fans that use an integrated pulley system take longer to install but a belt drive unit provides for a smoother and quieter operation. Sizing a whole house fan.

This ventamatic whole house direct drive fan offers an efficient way to trim cooling costs while keeping your entire home more comfortable. Direct drive models are the most do it yourself friendly because for most no attic joists need to be cut. There s also no belt residue and these fans cost less to maintain generally speaking because belts don t wear down and break. Where on a belt drive fan the fan motor shaft has a pulley connected by a belt to a second pulley.

Belt drive fans are quieter than direct but still noisy. You have a fan a motor and maybe a coupling. However a belt drive fan has power transmission loss due to the friction between the belt and sheaves and due to the drive shaft bearings. Unlike belt driven fans there s less energy loss because there s a reduced amount of friction as the fan operates.

This is because of the fact that the amount of friction is greatly reduced in case of this fan when the fan is operating. Ventamatic whole house fan 24in 3092 cfm belt drive model cx24bd2spd 9. Greater efficiency is the biggest pro of direct drive fan configurations. That would be quiet but would look like a mess from outdoors.

Most whole house fans are relatively easy to install. Installation of an air vent attic fan in my garage. It s balance or lack of balance actually which causes most of the noise.