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iO HVAC Controls, HD-NA-3020, 30" x 20" Two-Position Zone Damper, No Actuator, 5/8" - 1/2" Shaft
Features:
The HD Series dampers are extruded aluminum parallel blade dampers. The HD Series dampers can be installed in any position. They are rated for duct systems with less than 1.0" WC. The damper has a simple adjustment for setting the minimum position.
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