Belt Drive Vs Direct Drive Whole House Fans

Unlike belt driven fans there s less energy loss because there s a reduced amount of friction as the fan operates.

Belt drive vs direct drive whole house fans.

With a belt drive the fan speed can be easily raised or lowered but there is belt and bearing maintenance to consider with a belt drive there are 2 additional bearings. Is it better to get a directive or a belt driven whole house fan. Greater efficiency is the biggest pro of direct drive fan configurations. Sizing a whole house fan.

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. 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. Direct drive fans require fewer parts and thus usually less maintenance. This is because of the fact that the amount of friction is greatly reduced in case of this fan when the fan is operating.

That would be quiet but would look like a mess from outdoors. Summer is over and i am planning for the next summer. The two bearings on direct drive fan motors which are 7 horsepower and larger are typically regreaseable. Belt drive fans have two additional bearings.

4 296 received 2. On both direct drive and belt drive fans the motor has two bearings. 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. 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.

Thus the fan blades will rotate at the same speed as the motor rotates. You have a fan a motor and maybe a coupling. Where on a belt drive fan the fan motor shaft has a pulley connected by a belt to a second pulley. 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. Sponsored links 2 10 08 15 06 56 pm g. Basically the difference between this whole house fan version and some of the others on this list is that with the tpi belt drive whole house fan you re getting a much more compact portable unit. It s not as powerful as some of the others we ve talked about but it s still a suitable choice if you re primarily concerned with.

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 the belt driven fans in case of a direct drive fan there is lesser energy loss. Direct drive vs belt. The second pulley is connected to a shaft that drives the fan propeller.

Most whole house fans are relatively easy to install.