These are excellent quality back draft dampers. They are made from heavy-gauge galvanized steel with heavy duty springs. They use both an embossed ...View full details
Customers can automatically reduce heating and cooling inefficiencies in their home and indoor garden with ZoneMaster™ Dampers. Once installation a...View full details
Made of galvanized steel. Prevents reverse air flow when fans are shut off. Saves CO2 and prevents odors from flowing backwards. Rubber gasket pre-...View full details
Recommended as the next line of defense against odor control. Backdraft Dampers prevent air from reverse flowing through the fan when powered off. ...View full details
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