Series ZCD zone control dampers are designed to meet the demand for zone-specific products combined with individual controls. Model ZCDRS25 can be installed in existing round duct. It comes with 24-V ...

Green zone control dampers are powered normally open or normally closed 24 vac with an 88-pound torque motor; there is no wasted energy by springs to overcome or to be held open. According to the ...

An algorithm has been developed for the control of semi-active dampers which uses the feedback of displacement and velocity signals measured across the damper. This algorithm has been called "relative ...