Vents US Shop
Vents KOM 100 U 4 Inch Backdraft Damper 2 Pack
Vents KOM 100 U 4 Inch Backdraft Damper 2 Pack
In stock
Shop Smart. Shop Manufacturer Direct. Free Shipping on every order!
Couldn't load pickup availability
The 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 air ducts and secured in place with clamps. Crafted from high-quality galvanized steel housing, it features precision-engineered aluminium blades with spring-loaded action. To enhance performance and reduce noise, the damper is equipped with foamed rubber seals that provide both noise absorption and exceptional air tightness.
Perfect Solution for Bathrooms, Cottages, Kitchens, Apartments and Tiny Homes.
Need larger quantities?
We work with contractors, developers, and builders across North America. 📞 Call us toll-free or email our sales team - we’ll get you great pricing for your project.
Features:
- 24/26 gauge Galvanized Steel construction
- Compatible with a 4" duct
- Spring Loaded Damper
- Rubber Seal
Need assistance? Call us at 1-833-878-3687. Mon-Fri, 9 am to 5 pm (EST).
Details
Downloads
Installing a KOM Backdraft Damper






Why Shop Direct?
Competitive Pricing
No middleman, just great savings. When you shop directly from Vents-US, you skip the middleman and get manufacturer-direct pricing on high-quality ventilation products. We cut out the extra costs associated with third-party retailers, ensuring you get the best value possible. Plus, we stand by our pricing - if you find a lower price from an authorized dealer, we’ll match it so you can shop with confidence knowing you're always getting the best deal.
Expert Support
Get advice straight from the source. When you buy directly from Vents-US, you get access to our team of ventilation experts who know our products inside and out. Whether you need help selecting the right exhaust fan, troubleshooting an installation, our specialists provide accurate, reliable, and manufacturer-backed guidance. Unlike third-party sellers, we ensure you get the best product for your needs and ongoing support before, during, and after your purchase.
Guaranteed Quality
100% authentic with full warranties.When you shop directly from Vents-US, you’re getting genuine, factory-fresh products straight from the manufacturer. Unlike third-party resellers, we ensure that every item meets our strict quality standards and comes with a full manufacturer-backed warranty. If anything goes wrong, you're covered by a hassle-free warranty process handled directly by us, with no middleman to slow things down.
Exclusive Deals and Free Shipping!
More savings, no extra fees. Shopping directly from Vents-US means no hidden markups, no reseller commissions, and no unnecessary fees—just factory-direct pricing that helps you save. We regularly offer exclusive promotions, bulk discounts, and limited-time deals that you won’t find anywhere else. Plus, with fast, free shipping on all orders, you get even more value without surprise costs at checkout. That means more savings in your pocket while still getting the highest quality ventilation products straight from the source.
Learn More with Vents-US
View all-
ERV & HRV Core Technologies Explained: Crossflo...
When it comes to balanced ventilation, the heart of every Energy Recovery Ventilator (ERV) or Heat Recovery Ventilator (HRV) is its core-the component responsible for transferring energy between outgoing and...
ERV & HRV Core Technologies Explained: Crossflo...
When it comes to balanced ventilation, the heart of every Energy Recovery Ventilator (ERV) or Heat Recovery Ventilator (HRV) is its core-the component responsible for transferring energy between outgoing and...
-
How to Install the Vents GK 150 MA Garage Fan K...
Proper garage ventilation is often overlooked, yet it’s one of the most important upgrades homeowners and contractors can make. Whether you’re working on cars, using power tools, or simply storing...
How to Install the Vents GK 150 MA Garage Fan K...
Proper garage ventilation is often overlooked, yet it’s one of the most important upgrades homeowners and contractors can make. Whether you’re working on cars, using power tools, or simply storing...
-
Vents-US Garage Fan Kits: Say Goodbye to Fumes ...
Garages and workshops are some of the most under-ventilated spaces in a home or business. Whether you’re working on vehicles, painting, or using power tools, these enclosed environments can quickly...
Vents-US Garage Fan Kits: Say Goodbye to Fumes ...
Garages and workshops are some of the most under-ventilated spaces in a home or business. Whether you’re working on vehicles, painting, or using power tools, these enclosed environments can quickly...