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The HD-NA-1816-BM is a 18" x 16" Two-Position Zone Damper-No Actuator, 5/8-1/2 Shaft - Bottom Mounted manufactured by iO HVAC. This rectangular damper is designed for residential applications. It provides efficient zone control, optimizing airflow and temperature regulation throughout the home. It does not include an actuator.
The HD-NA-1816-BM is a zone damper without an actuator, designed for residential HVAC systems.
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