Attic Fan Belt Vs Direct Drive

Most whole house fans are relatively easy to install.

Attic fan belt vs direct drive.

Direct drive fans have no power transmission loss since the propeller is directly connected to the motor shaft. That would be quiet but would look like a mess from outdoors. Unlike the belt driven fans in case of a direct drive fan there is lesser energy loss. 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.

The second pulley is connected to a shaft that drives the fan propeller. Coming to the advantage of this kind of an industrial fan the biggest advantage is greater efficiency. Belt drive fans are quieter than direct but still noisy. Where on a belt drive fan the fan motor shaft has a pulley connected by a belt to a second pulley.

Cool attic belt drive whole house fan 36in 9 700 cfm model cx36bd2spd. I fantasized building a small shack outside my house and setting the attic fan in the shack and running a duct up to the attic and through the same vent as an attic fan. You have a fan a motor and maybe a coupling. A well balanced direct drive is far quieter than belt.

Direct drive models are the most do it yourself friendly because for most no attic joists need to be cut. Ventamatic whole house fan 24in 3092 cfm belt drive model cx24bd2spd 9. 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. There s also no belt residue and these fans cost less to maintain generally speaking because belts don t wear down and break.

Sizing a whole house fan. This is because of the fact that the amount of friction is greatly reduced in case of this fan when the fan is operating. It s incredibly hard to balance a belt and pulley system. Unlike belt driven fans there s less energy loss because there s a reduced amount of friction as the fan operates.

Direct drive fans require fewer parts and thus usually less maintenance. Greater efficiency is the biggest pro of direct drive fan configurations. It s balance or lack of balance actually which causes most of the noise.