Kitchen Exhaust Backdraft Damper

Back draft dampers are commonly installed in fan exhaust systems to prevent a back draft of outside air when the fan is off. 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. The damper is either a spring return type for both horizontal and vertical mounting or gravity return used in vertical venting only.

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The outlet needs to be at least 10 feet from any window or other air inlet and it must be covered with a louver screen or grille.

Kitchen exhaust backdraft damper. I searched for wall termination louver type dampers but this fan is. In addition they install an exhaust grille in the kitchen ceiling. The famco bd butterfly damper is used as a back draft damper for heat exchangers exhaust systems solar heating systems and other intake or exhaust applications where a powered damper is not needed. Backdraft dampers aren t airtight for technical reasons.

There is only one practical application for installing modulating dampers in high temperature grease ducts over kitchen hoods serving commercial cooking equipment. The exhaust duct must have a backdraft damper that prevents outside air from entering the exhaust system. Backdraft dampers with galvanized steel collar and lightweight aluminum damper blades. Backdraft shutters or butterfly dampers are commonly used with inline exhaust fan systems.

This damper works in both horizontal or vertical positions upward airflow only and the foam seal provides minimal air leakage. The damper can be placed just beyond the hood itself or it can be incorporated into the vent cover. 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. In this installation video we show you how to install a back draft damper.

Back draft dampers allow exhaust air to flow out of the home while stopping air from the outside of the home to leak in. Spring loaded for positive closure. The rigid elbow provides an efficient turn and at the same time maximizes sound absorption. Used to reduce the noise of any inline exhaust fan kitchen exhaust systems.

First it seems that building code here in nj does not allow for an inline damper to be installed i think. I d like to install a damper somewhere but i m running into two issues. Broan nutone ae80b invent series single speed fan ceiling room side installation bathroom exhaust fan energy star certified 1 5 sones 80 cfm 4 6 out of 5 stars 294 55 97 55. Air pressure or out draft opens both types of back draft dampers.

Luckily my clients trust me and declined to order a huge 1600 cfm kitchen exhaust fan and settled on a 3 stage fan with a maximum of 400 cfm. Instead they install a recirculating range hood fan with a charcoal filter. They are a necessary component for installation in 6 star rated energy saving homes. A high rise building in an urban setting with a kitchen having multiple hoods totaling over 10 000 cfm that are located on a lower level where there is no other way to exhaust the effluent other than design a single chase and duct.