4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
Description
🚫💨 Stop the backdraft, start fresh airflow!
- VERSATILE COMPATIBILITY - Ideal for ACs, exhaust fans, range hoods, heating ducts, and more across residential, commercial, and industrial settings.
- PRECISION FIT GUARANTEED - Engineered for a snug fit in standard 4-inch ducts, minimizing leaks and maximizing airflow control.
- OPTIMIZED AIRFLOW CONTROL - One-way damper design prevents unwanted backflow, enhancing ventilation efficiency and indoor air quality.
- DURABLE METAL CONSTRUCTION - Galvanized steel body with aluminum flaps ensures long-lasting performance and corrosion resistance.
- EASY TOOL FREE INSTALLATION - Simply push into your 4-inch duct; spring mechanism ensures perfect flap operation both horizontally and vertically.
This 4-inch backdraft damper features a robust galvanized steel body with aluminum flaps, designed to prevent reverse airflow in ventilation systems. Easy to install in standard ducts, it optimizes air circulation for residential and commercial use, ensuring efficient ventilation and improved indoor air quality.
Specifications
| Manufacturer | Kikerike |
| Item Weight | 4.2 ounces |
| Package Dimensions | 5.43 x 5 x 3.78 inches |
| Size | 4 Inch |
| Color | Sliver |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |
Have a Question? See What Others Asked
Reviews
J**4
Durable
Durable, well built. Much better than the plastic one that came with the house. Building code should not allow plastic vents in Fl.
R**Z
Great quality
Great quality! Better than Home Depot's
M**K
Everything was fine
Everything was fine
S**.
good valve
good valve
T**T
Great quality. If your stove hood/microwave baffle is junk swap for this.
I had a high volume of backdraft coming out of my over the range microwave making the kitchen 12 degrees colder than the rest of the house when it gets cold. I played with the baffle that came with the microwave, which involves taking down the microwave each time, bouncing between allowing it to work but really not stopping any backdraft to it getting stuck preventing any stove venting getting through. If I had bought this 17 dollar (6in black) item before this last cold spell I would have saved hundreds of dollars on heating. Everything is quality with this. For such thin (lighter is better) sheet metal the vanes are perfectly flat and square making full contact with the generous gasket keeping all air out of the house. The lowest setting on the vent fully opens the vanes. Even the paint job, where only a 1/4" section can be seen when installed, looks high quality. Easy to install just pop off the vent cap outside, drop this in to the vent pipe (I then duct taped it because I didn't by a clamp) then tighten the vent cap back on to the other half of this.
D**N
Works at low flow
Was hoping it would be sensitive enough to use on my air exchanger at low speed and it is. Exactly what I needed.
B**E
Spring are weak.
Fits nicely inside a 6 inch pipe. I used it in the pipe from my cooktop downdraft to the remote blower. The springs are not strong enough to hold the flaps closed when mounted vertically. Don't know if a back draft will close them. I wanted it to keep the cold air outside.
R**L
Inline Damper
I installed this inline for my over the range microwave oven. The damper that comes with the microwave oven wouldn’t work properly with a rectangular to round adapter. I tested this before final install and it worked fine. Just be sure you have the flow direction correct. I did find it difficult to get the aluminum vent pipe to mate with the damper. I finally got it then taped it real good.
Common Questions
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