The code change is part of the state’s Title 24 regulations implemented July 1, 2014, and while the rule is not a complete ban on the use of bypass ducts, it greatly limits their usage in newly constructed residential buildings.
The Wireless Zone Control Dampers are available in a retrofit configuration with the full-tube style in the round version or with a frame style in the rectangular version. Dampers will need 24 V to be wired to the motor, while the control of the movement is done wirelessly.
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, says the company. The damper has been designed with both a fixed and a hinged blade and is controlled by an actuator.