Belt Drive Vs Direct Drive Whole House Fans

Coming to the advantage of this kind of an industrial fan the biggest advantage is greater efficiency.

Belt drive vs direct drive whole house fans.

Direct drive fans require fewer parts and thus usually less maintenance. 4 296 received 2. Thus the fan blades will rotate at the same speed as the motor rotates. Direct drive models are the most do it yourself friendly because for most no attic joists need to be cut.

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. The two bearings on direct drive fan motors which are 7 horsepower and larger are typically regreaseable. 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.

Direct drive fans should be designed for acceptable bearing life. Most whole house fans are relatively easy to install. That would be quiet but would look like a mess from outdoors. Direct drive vs belt.

Summer is over and i am planning for the next summer. Unlike the belt driven fans in case of a direct drive fan there is lesser energy loss. 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. 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.

Unlike belt driven fans there s less energy loss because there s a reduced amount of friction as the fan operates. You have a fan a motor and maybe a coupling. On both direct drive and belt drive fans the motor has two bearings. Sponsored links 2 10 08 15 06 56 pm g.

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. This is because of the fact that the amount of friction is greatly reduced in case of this fan when the fan is operating. Greater efficiency is the biggest pro of direct drive fan configurations. 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.

Sizing a 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. Belt drive fans have two additional bearings. 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.

The second pulley is connected to a shaft that drives the fan propeller.