Vents KOM 100 U 4 Inch Backdraft Damper Quantity:Vents KOM 100 U 4" 2 Pack Compatible with a 6" duct

Compatible with a 6" duct

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reducing heat loss from ventilation

Introducing the Vents VKM 125 - 5" Inline Centrifugal Duct Fan

Vents KOM 100 U 4 Inch Backdraft Damper Quantity:Vents KOM 100 U 4" 2 Pack Compatible with a 6" ductThe 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