A Round Barometric Damper is used to automatically bypass excess air when increases in duct static pressure occur due to closing of zone dampers. Various relief air control settings are easily accomplished by simple adjustment of an integral weighted control lever.

A Rectangular Barometric Damper is used to automatically bypass excess air when increases in duct static pressure occur due to closing of zone dampers. Various relief air control settings are easily accomplished by a simple adjustment of an integral weighted control lever. Mounting plate is provided for slip-in installation in the side of the duct.

The ideal backdraft damper for solar, fresh air intake, heat exchangers and other air duct applications.