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🚀 Elevate your airflow game with the ultimate backdraft defender!
The AC Infinity Backdraft Damper 4" is a heavy-duty, precision-engineered duct insert designed to prevent backflow and debris in HVAC systems. Featuring a galvanized steel body, airtight rubber gaskets, and spring-loaded aluminum blades, it ensures efficient, draft-free ventilation for range hoods, bathroom fans, and more. Its versatile mounting options and powder-coated finish make it a durable, professional-grade solution trusted by thousands.










| ASIN | B0842XSTV9 |
| Best Sellers Rank | #38,318 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #48 in HVAC Ducting |
| Brand Name | AC Infinity |
| Color | Black |
| Customer Reviews | 4.6 4.6 out of 5 stars (2,053) |
| Item Dimensions | 5 x 3.81 x 3.81 inches |
| Item Highlight | Antidraft Duct Insert w/ Airtight Seal & Spring-Loaded Aluminum Folding Blades for Ducting in Range Hoods and Bathroom Fans |
| Manufacturer | AC Infinity |
| Manufacturer Part Number | AC-BDD4-B |
| Material Type | Alloy Steel, Aluminum |
| Model Number | AC-BDD4-B |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Size | 4" |
| UPC | 819137021303 |
| Unit Count | 1 Count |
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