Another ZoneFirst innovation to the industry, the Static Pressure Adjustable Damper, Model SPAD, is a single blade, counter-balanced spring damper that operates on air pressure in order to control the flow of by-pass air on a zoned system. The SPAD utilizes an adjustable knob/blade to maintain the correct amount of pressure in the duct system. The SPAD allows for setpoints between 0.2 inches W.C. of pressure to 1.inch W.C.
Available in round dampers only: 83, 103, 123, 143