Reduce Attic Fan Vibration

One reason power attic ventilators don t help in my original article i focused on makeup air.

Reduce attic fan vibration.

Attic is 1 500 sqft. In order to get rid of the hum you need to either operate the fan at a low speed or replace the fan with a new one that has more blades. A significant amount of that cooling is likely to come from conditioned air being sucked up from the house below. Attic fans also have small ball bearings that help lubricate the fan s movement.

If you feel any vibration of building components you can be sure it is being transferred back into the building. If the fan itself is touching any building components adjust the fan supports so it does not do this. If this does not stop the noise then slide a washer over the screw so it will be positioned between the screw and the fan. A gable attic fan is attached to the attic wall by screws and if they are loose the vibration can cause an awful noise.

Tighten any loose screws. 1 5500cfm attic fan with thermostat and humidistat. A newly installed attic fan vibrates. If it s an electric fan turn the mains off.

Due to regular wear and tear these bearings can become worn out or lose their lubrication ability. The attic fan tends to makes a humming noise when it has a few blades and is running at a high speed setting. Turn the power back on to help dry the blades and see if the fan still vibrates. Manufacturer airvent inc model 53850 suggested use up to 2100sqft.

If the fan is in the attic feel any framing that the fan is attached to or the pipe rubs up against. And if it s powered by solar panels turn those off instead. Detach the fan from the power source. Feel the drywall inside the home that is closest to the fan location for vibration.

Crappy fan or improper mounting. You need to secure the screws in place more tightly by rotating the screwdriver clockwise. Remove the current worn out bearings and replace them. This can cause the fan to start making constant noise and in some cases even a loud squealing sound.

The lateral deflection is minimal think back massager not a ceiling fan with one blade.