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The IO HVAC CONTROLS HD-BM-NA-3220 is a two-position zone damper with a bottom mount and no actuator, designed for a 5/8-1/2 shaft. These dampers feature extruded aluminum parallel blades and can be installed in any position. It has a simple adjustment for setting the minimum position and is rated for duct systems less than 1.0” WC.
The IO HVAC CONTROLS HD-BM-NA-3220 is a two-position zone damper with a bottom mount and no actuator, designed for a 5/8-1/2 shaft.
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