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The IO HVAC CONTROLS HD-BM-NA-2018 is a 20 x 18 Two-Position Zone Damper Bottom Mount designed without an actuator and features a 5/8-1/2 shaft. These dampers are suitable for residential applications and can be installed in any position within duct systems less than 1.0” WC.
Extruded aluminum parallel blade dampers are shipped complete and ready for installation with a simple adjustment for setting the minimum position.
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