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๐ซโ๏ธ Stop drafts, start comfort โ your ductsโ new best friend!
The AC Infinity 100mm Backdraft Damper is a heavy-duty, spring-loaded one-way airflow insert designed for 4-inch ducting in range hoods, bathroom fans, and HVAC systems. Featuring a galvanized steel body with powder coat finish and airtight rubber gaskets, it prevents backflow, cold drafts, and debris while allowing smooth airflow with minimal resistance. Its versatile horizontal or vertical mounting and durable construction make it a must-have upgrade for efficient, draft-free ventilation.



















| ASIN | B0842XSTV9 |
| Best Sellers Rank | 50,959 in DIY & Tools ( See Top 100 in DIY & Tools ) 123 in Ducting |
| Brand | AC Infinity |
| Colour | Black |
| Country of Origin | China |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,872) |
| Item Dimensions | 12.7 x 9.7 x 9.7 centimetres |
| Manufacturer | AC Infinity |
| Material | Alloy Steel, Aluminium |
| Model Number | AC-BDD4-B |
| Part Number | AC-BDD4-B |
| Size | 4 Inch |
| Thread Type | NPT |
| UPC | 819137021303 |
| Unit Count | 1.0 count |
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