Exhaust Fan Damper Noise

Tape it to the exhaust hood where the flapper hits.

Exhaust fan damper noise.

If the noise drives you crazy new spring loaded backdraft dampers 9 to 30 depending on the size should solve the problem. New exhaust fan easy installation. You ll hear a single authoritative solid thunk. If the noise is now gone and the bathroom exhaust fan is quieter the problem is fixed.

When the vent hood fan is shutoff and the airflow diminishes and the flapper begins to close. This may just damper down the problem to not have to really solve it this flapping noise comes from the. This operating noise sometimes keeps occupants from using the exhaust fan when they should be such as when taking a long hot shower cleaning using chemicals or cooking a meal on the oven or stove. The kit works on most broan nutone and nautilus bathroom fans most bath fans are one of these brands.

A new kit from broan and nutone lets you cut fan noise almost in half meaning the fan is barely audible. I have the nutone ls80lf bathroom vent fan. The ir is an iris damper for measuring and adjusting the air flow. If after cleaning out the bathroom exhaust vent and fan or blower wheel you will need to adjust the fan or blower wheel.

A similar noise problem in multiple areas might indicate that the pressure in the ductwork is too high davis says. Continental fan bathroom exhaust fan kit. Now it opens when it s turned on and makes zero flapping noise when it s not. Start by replacing the backdraft damper directly above the vent hood.

Gerry has a bathroom exhaust fan damper that keeps him awake at night well gerry we can t always stop it but we certainly can tone it down the first and cheapest step is to get some of that soft foam self adhesive weather stripping tape. The ir has the following specifications. Back draft dampers ceiling grilles mounting clamps dual venting y adapters reducer increaser roof wall caps louver shutters flexible insulated duct. If this is the case in your building davis recommends lowering the speed of the main fans.

After an easy removal of the fan to access the plastic flapper i simply used double sided 3m tape and attached a plastic washer at the bottom of the flapper. Installing the new fan and motor only takes about 10 minutes with no rewiring or duct work required. Poor installation can cause the exhaust fan to be noisy when operating. The damper also has an adjustment aperture which can be opened completely which means there is no need for an access door for cleaning.

This will reduce the flow throughout the system and cut back on noise. Turn the exhaust fan on and look at the fan blade or blower wheel with a flashlight to find out where it is hitting. When the vent hood fan turns on the air pressure rushing out forces the vent to open breaking the magnetic force holding the flapper closed. As soon as the magnet nears the adjustable screw.