Direct Drive Vs Belt Drive Attic Fan

Direct drive fans require fewer parts and thus usually less maintenance.

Direct drive vs belt drive attic fan.

Sizing a whole house fan. I think that the belt drive blades can turn slower with a deeper pitch than a direct drive. Where on a belt drive fan the fan motor shaft has a pulley connected by a belt to a second pulley. Attic mounts installed in the roof or exterior wall of the attic blow air directly out.

That would be quiet but would look like a mess from outdoors. Direct drive models are the most do it yourself friendly because for most no attic joists need to be cut. Unlike the belt driven fans in case of a direct drive fan there is lesser energy loss. The second pulley is connected to a shaft that drives the fan propeller.

Cool attic 24 in steel single belt drive whole house fan. 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. Attic fan prices expect to pay between 50 to 400 and up for an attic fan depending on the type and quality. Belt drive attic fans are usually much quieter than direct drive models though the latter are often cheaper.

In a direct drive configuration the fan motor that controls the movement of the fan blades is connected either to a shaft or fan axle. Unlike belt driven fans there s less energy loss because there s a reduced amount of friction as the fan operates. Belt drive fans are quieter than direct but still noisy. Direct drive fans have no power transmission loss since the propeller is directly connected to the motor shaft.

Thus the fan blades will rotate at the same speed as the motor rotates. Most whole house fans are relatively easy to install. Spruce spruce rb series ventilation fans 8 in steel single direct drive whole house fan. That pulls more air with less fan noise.

For pricing and availability. Greater efficiency is the biggest pro of direct drive fan configurations. You have a fan a motor and maybe a coupling. 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.

Coming to the advantage of this kind of an industrial fan the biggest advantage is greater efficiency. This is because of the fact that the amount of friction is greatly reduced in case of this fan when the fan is operating. I had a belt drive with a two speed motor years ago.