Belt Drive Vs Direct Drive Whole House Fans

Thus the fan blades will rotate at the same speed as the motor rotates.

Belt drive vs direct drive whole house fans.

Greater efficiency is the biggest pro of direct drive fan configurations. 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. Direct drive fans have no power transmission loss since the propeller is directly connected to the motor shaft. You have a fan a motor and maybe a coupling.

Unlike belt driven fans there s less energy loss because there s a reduced amount of friction as the fan operates. 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. Belt drive fans are quieter than direct but still noisy. Direct drive models are the most do it yourself friendly because for most no attic joists need to be cut.

4 296 received 2. The two bearings on direct drive fan motors which are 7 horsepower and larger are typically regreaseable. 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. Direct drive vs belt.

Unlike the belt driven fans in case of a direct drive fan there is lesser energy loss. Direct drive fans require fewer parts and thus usually less maintenance. On both direct drive and belt drive fans the motor has two bearings. 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.

Belt drive fans have two additional bearings. Summer is over and i am planning for the next summer. Sizing a whole house fan. Where on a belt drive fan the fan motor shaft has a pulley connected by a belt to a second pulley.

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. Is it better to get a directive or a belt driven whole house fan. The second pulley is connected to a shaft that drives the fan propeller. That would be quiet but would look like a mess from outdoors.

This is because of the fact that the amount of friction is greatly reduced in case of this fan when the fan is operating. 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. Most whole house fans are relatively easy to install. Sponsored links 2 10 08 15 06 56 pm g.

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.