Vents KOM 125 U 5 inch Backdraft Damper Single

Vents KOM 125 U Spring-Loaded Backdraft Damper - 5-Inch Duct

The Vents KOM 125 U Spring-Loaded Backdraft Damper provides dependable protection against unwanted backdraft in 5-inch round duct systems. Perfect for residential and light-commercial ventilation, this backdraft damper prevents outside air, insects, and debris from entering when your fan or ERV is off.

Efficient Backdraft Prevention

Built with precision-balanced aluminum blades that open easily with airflow and close tightly via a spring-loaded mechanism, the KOM 125 U ensures smooth operation and an airtight seal every time.

Durable, Quiet, and Easy to Install

Constructed from 24-gauge galvanized steel with lightweight aluminum blades, this damper is corrosion-resistant and designed for long-term reliability. Foamed rubber seals help reduce vibration noise while improving efficiency by keeping conditioned air where it belongs. Installation is quick and simple-just insert into standard 5-inch ducting and you're good to go. What makes a Vents Backdraft damper special? Read our Blog here.

Ideal Applications

Perfect for use in:

• Bathrooms and kitchen exhaust systems
• Garages, workshops, and laundry rooms
• Cottages, apartments, and tiny homes

Product Features

• Compatible with 5-inch round ducts
• Spring-loaded aluminum blades for positive closure
• 24-gauge galvanized-steel housing for strength
• Foamed rubber seals for airtight fit and noise reduction
• Lightweight, corrosion-resistant design

Contractor & Bulk Pricing

Working on a large project? We support contractors, builders, and developers across North America. Call us toll-free or email our sales team - we’ll get you great pricing for your project.