Exhaust Fan Damper Flap

Step 1 disconnect the vent tube from the problem vent in the attic.

Exhaust fan damper flap.

You ll hear a single authoritative solid thunk. 4 6 out of 5 stars 548. When the vent hood fan is shutoff and the airflow diminishes and the flapper begins to close. By replacing the old flap with one that is weighted or has a spring you can stop the wind from opening the vent flap.

The exhaust is connected to a duct that leads outside where the fan distributes the hot wet air that occurs during a shower. As soon as the magnet nears the adjustable screw. If the noise drives you crazy new spring loaded backdraft dampers 9 to 30 depending on the size should solve the. 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.

They are a necessary component for installation in 6 star rated energy saving homes. This is usually just a few screws. The vent hood ducts through a rigid or flexible pipe to a cap on the roof or side of your home. Tape it to the exhaust hood where the flapper hits.

Backdraft shutters or butterfly dampers are commonly used with inline exhaust fan systems. 1 16 of over 1 000 results for exhaust fan damper iliving 16 wall mounted exhaust fan automatic shutter variable speed vent fan for home attic shed or garage ventilation 1200 cfm 1800 sqf coverage area. Set the screw aside for reuse later. Most bath fans are mounted to a ceiling joist with the duct running parallel to the joist.

There is a small plastic device called a damper flap that regulates the flow of air in this case it is supposed to keep cold drafts out and your heated air in. 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. Start by locating the direction of your ceiling joists photo 1 then locate the damper you may have to remove the fan motor and blade from the housing. If you want to stop cold air you need to have a great damper or double damper at the exhaust hood where the air leaves your home.

We sell backdraft shutters in both plastic and metal with a variety of sizes available depending on the size of fan and ducting you are using. Often a stiff wind will open vent dampers causing them to periodically clang shut.