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๐ Keep your airflow flawless and your space draft-free with smart precision!
The AC Infinity 100mm Backdraft Damper is a robust, spring-loaded airflow insert designed for 4-inch ducts in range hoods, bathroom fans, and HVAC systems. Featuring galvanized steel construction, powder-coated finish, and airtight rubber gaskets, it prevents backflow and debris intrusion while allowing smooth one-way airflow. Its versatile horizontal or vertical mounting and minimal activation airflow make it an essential upgrade for efficient, clean ventilation.



















| ASIN | B0842XSTV9 |
| Best Sellers Rank | 57,385 in DIY & Tools ( See Top 100 in DIY & Tools ) 163 in Ducting |
| Brand | AC Infinity |
| Colour | Black |
| Connector Type | Insert |
| Country of Origin | China |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,907) |
| Item Dimensions | 12.7 x 9.7 x 9.7 centimetres |
| Manufacturer | AC Infinity |
| Material | Alloy Steel, Aluminium |
| Model Number | AC-BDD4-B |
| Number of Packs | 1 |
| Part Number | AC-BDD4-B |
| Size | 4 Inch |
| Thread Type | NPT |
| UPC | 819137021303 |
| Unit Count | 1.0 count |
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