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Ships within 48 hours · Estimated delivery Nov 14 - Nov 19
built-in speed control
Once in place
year-round air exchange when temperatures drop
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It can also be used to support room-to-room airflow in homes or buildings without ductwork
Vents KOM 100 U 4 Inch Backdraft Damper Quantity:Vents KOM U 100 4" Single built-in speed controlThe Vents US KOM 100 U Spring Loaded Backdraft Damper is designed for round duct systems. This essential component ensures the prevention of backdraft (and insects, birds, etc) when the ventilation system is inactive. Its operation is intuitive the blades automatically open when air flows through, and they securely close thanks to a robust spring mechanism. Designed for easy installation, this high quality damper is seamlessly integrated into round
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