4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Vent Deflector (4 in)
Product ID: 366297764
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↔️One-way airflow backdraft prevention
⚙️Stainless steel spring for optimal flap action
🛠️Galvanized steel & aluminum build
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Description
🌬️ Stop the backdraft, start fresh airflow – your ventilation’s new best friend!
- EFFORTLESS INSTALLATION - Push-in design fits snugly into 4-inch ducts for quick, tool-free setup.
- VERSATILE COMPATIBILITY - Ideal for ACs, exhaust fans, range hoods, and heating ducts across residential and commercial spaces.
- PRECISION AIRFLOW CONTROL - One-way damper design prevents unwanted backdrafts, maintaining fresh, clean ventilation.
- DURABLE METAL CONSTRUCTION - Galvanized steel body with aluminum flaps ensures long-lasting performance and corrosion resistance.
- OPTIMIZED SPRING MECHANISM - Stainless steel spring guarantees smooth flap movement for reliable airflow regulation.
This 4-inch backdraft damper features a galvanized steel body, aluminum flaps, and a stainless steel spring to prevent reverse airflow in ventilation ducts. Designed for easy push-in installation, it fits most rigid ducts and enhances air quality by stopping backflow in HVAC, exhaust, and heating systems.
Specifications
| Manufacturer | dojobkinb |
| Item Weight | 4.6 ounces |
| Package Dimensions | 6.38 x 5.04 x 3.66 inches |
| Size | 4 Inch |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |
Have a Question? See What Others Asked
Can this be used for inbound furnace air to keep out bugs and cold when not on?
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Trustpilot
TrustScore 4.5 | 7,300+ reviews
Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.
1 day ago
Excellent communication throughout the order process. Product is perfect.
2 weeks ago
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