Exhaust Fan Damper Noise

When the vent hood fan is shutoff and the airflow diminishes and the flapper begins to close.

Exhaust fan damper noise.

If after cleaning out the bathroom exhaust vent and fan or blower wheel you will need to adjust the fan or blower wheel. Single dual vent. Continental fan bathroom exhaust fan kit. Low noise level centrically formed air flow and fixed test points for precise measurements.

Not using exhaust fans will cause moisture issues in the home. Back draft dampers ceiling grilles mounting clamps dual venting y adapters reducer increaser roof wall caps louver shutters flexible insulated duct. If the noise is now gone and the bathroom exhaust fan is quieter the problem is fixed. Turn the exhaust fan on and look at the fan blade or blower wheel with a flashlight to find out where it is hitting.

If the noise drives you crazy new spring loaded backdraft dampers 9 to 30 depending on the size should solve the problem. You ll hear a single authoritative solid thunk. This will reduce the flow throughout the system and cut back on noise. 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.

Now it opens when it s turned on and makes zero flapping noise when it s not. New exhaust fan easy installation. The ir is an iris damper for measuring and adjusting the air flow. 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.

If this is the case in your building davis recommends lowering the speed of the main fans. Start by replacing the backdraft damper directly above the vent hood. A similar noise problem in multiple areas might indicate that the pressure in the ductwork is too high davis says. I have the nutone ls80lf bathroom vent fan.

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. This may just damper down the problem to not have to really solve it this flapping noise comes from the. Poor installation can cause the exhaust fan to be noisy when operating. The kit works on most broan nutone and nautilus bathroom fans most bath fans are one of these brands.

Tape it to the exhaust hood where the flapper hits. As soon as the magnet nears the adjustable screw. Installing the new fan and motor only takes about 10 minutes with no rewiring or duct work required. The ir has the following specifications.