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Range hood vent backdraft damper. They need to be able to open easily when the fan starts up some passivhaus builders don t install a range hood fan that is ducted outdoors. Aldes 6 inch round spring loaded backdraft damper professional grade. If your range vent hood has a capacity of 400 cfm or more irc requires an interlocked a k a automatic synchronized universal makeup air damper system with very good reason. 1 16 of 245 results for 6 range hood damper skip to main search results.
Broan 438 8 inch round range hood and ventilation fan exhaust damper n a 5 0 out of 5 stars 1 builder s best 011641 heavy gauge wall vent hood with spring loaded damper 6 diameter x 6 tail aluminum. 800 394 4020 or 604 430 5252 9am 5pm mon friday pt. A spring loaded damper or flap at the end of the range hood vent functions in the same way as a standard flap except that it uses pressure from a spring to stay closed. Backdraft dampers aren t airtight for technical reasons.
Kitchen exhaust fans are often installed by many different trades. If a spring loaded flap is allowing cold air in through the vent the spring mechanism is likely damaged or broken leaving. Most exterior terminations for range hood fan ducts include a backdraft damper. The device is called a backdraft damper.
4 6 out of 5 stars 130. Broan nutone pm390 power pack range hood insert exhaust fan and light combo for over kitchen stove 390 cfm aluminum. This makes it difficult for the wind to open it. In this installation video we show you how to install a back draft damper.
This video provides step by step repair instructions for replacing the air damper on a kitchenaid canopy vent hood model kvwb400dss. 5 items for you checklist. The range hood duct should have a smooth interior finish easy to clean be airtight and be equipped with a backdraft damper. The 7 round duct vents through the top of the range hood some hoods are single use ducted and some are convertible meaning that the hood is designed to be installed using more than one duct method or direction.
Back draft dampers allow exhaust air to flow out of the home while stopping air from the outside of the home to leak in. The most common reason for replacing the damper is if air is.