Bathroom Vent Fan Flapper

If you hear noise from the bathroom fan when it's windy, there's an easy explanation. It's because the wind is picking up the vent flapper and dropping it down repeatedly. You can resolve the issue by adding sound absorption, weight the damper, or replace it with a spring.

First of all, I have no idea which forum this question belongs in, so hopefully this is the right place. I bought a Nutone bathroom ventilation fan to replace an old fan that is going out. I noticed the flapper that comes with this Nutone fan is counterbalanced so it hangs partly open when.

I have a two-year-old home which has vent fans in the two bathroom ceilings. We live in a windy area, and the flabber doors on the fans are often banging open and shut. The noise is annoying, but I'm also concerned about the heat loss in the winter.

The fans are vented out the roof through a. The vent exits to the roof which has the standard Home Depot purchased style damper with built in flapper style damper. What is happening is that slight air pressure changes in the roof are causing the fan's built in plastic damper to ever so slightly lift and then drop.

Ok, I removed the bathroom vent fan from the ceiling, but I left the plastic damper duct connector with the flapper door assembly to remain in place on the vent tubing that runs up through the attic. Your bathroom fan makes noise when it's windy because its flapper gets raised by the wind, then drops down, producing the banging noise. Wind on the outside causes the air pressure to drop, sucking out the high.

This video describes a design flaw in nearly all bathroom exhaust fans. The built in flapper valve is not heavy enough to stay closed when winds are even mi. A: To lubricate the bathroom fan flapper valve, turn off the fan and remove the cover.

Apply a small amount of silicone. How do I Stop my bathroom vent from making noise? The ideal solution to eliminate your noise problem is to replace the damper with a spring. 3.

Clean the vent regularly: Keeping your bathroom vent clean will help reduce dust and dirt buildup, reducing noise from the air vents. 4. Eliminate noise sources: If you can hear your bathroom fan vents running, it's time to clean them out!

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