The patent-pending Barometric Zone Damper™ (BZD) works like any standard damper with one exception: It has a built-in barometric relief mechanism that eliminates the need for a bypass damper, said the company. The damper has been designed with both a fixed and a hinged blade and is controlled by an actuator. The upper half of the blade is fixed to the shaft of the damper and the lower half is hinged to the upper half of the blade. The lower half of the blade then functions as a barometric pressure relief for the system. The BZD will allow the barometric half of the closed zone damper to open and bleed a small amount of air into the zones that are not calling, keeping the system static pressure at an acceptable level. According to the manufacturer, the BZD damper is factory-set and should not need any adjustments. The dampers are available in round and rectangular shapes. The rectangular BZD is available in end and bottom mount, so it can be installed in the vertical or horizontal positions.
Jackson Systems LLC
888-652-9663
www.nobypassrequired.com
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