---
product_id: 209376297
title: "AC Infinity Backdraft Damper for 4\" Ducting"
brand: "ac infinity"
price: "€ 43.51"
currency: EUR
in_stock: true
reviews_count: 13
category: "Ac Infinity"
url: https://www.desertcart.at/products/209376297-ac-infinity-backdraft-damper-for-4-ducting
store_origin: AT
region: Austria
---

# spring-loaded airflow blades airtight rubber gasket seal 4-inch duct fit precision AC Infinity Backdraft Damper for 4" Ducting

**Brand:** ac infinity
**Price:** € 43.51
**Availability:** ✅ In Stock

## Summary

> 🔄 Stop backdrafts before they start — airflow perfected with style!

## Quick Answers

- **What is this?** AC Infinity Backdraft Damper for 4" Ducting by ac infinity
- **How much does it cost?** € 43.51 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/209376297-ac-infinity-backdraft-damper-for-4-ducting)

## Best For

- ac infinity enthusiasts

## Why This Product

- Trusted ac infinity brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Spring-Loaded Blades:** Innovative folding blades open with minimal airflow, ensuring efficient one-way ventilation.
- • **Versatile Mounting Options:** Mount horizontally or vertically to suit any HVAC setup without compromising performance.
- • **Airtight Rubber Gasket Seal:** Premium outer gaskets create a tight, secure seal to block drafts, debris, and pests.
- • **Durable Galvanized Steel Build:** Powder-coated steel body guarantees long-lasting durability and sleek aesthetics.
- • **Seamless 4" Duct Compatibility:** Perfectly engineered to fit standard 4-inch duct openings for effortless integration.

## Overview

The AC Infinity 4" Backdraft Damper is a high-quality HVAC accessory designed to prevent unwanted airflow and debris from entering duct systems. Featuring spring-loaded aluminum blades and airtight rubber gaskets, it fits standard 4-inch ducts and mounts in any orientation. Its galvanized steel construction with powder coat finish ensures durability and a professional look, making it ideal for range hoods, bathroom fans, and other ventilation applications.

## Description

AC Infinity is a technology company that specializes in environmental controls for audio/video and HVAC. The company was founded on the principle of working closely with customers to develop great products. Dependable service and a commitment to product quality are the foundations of the business's values. AIRTAP Series Visit the Store AIRTAP Series Visit the Store AIRTITAN Series Visit the Store AIRTITAN Series AIRLIFT Series Visit the Store AIRLIFT Series AIRBLAZE Series Visit the Store AIRBLAZE Series

Review: Performs well. Nicely made product at a fair price! - The AC Infinity products I’ve been getting all seen to be superior quality pieces (fan, collars, dampers). Couldn’t be happier. Shutters open easily but close solidly when there’s no air flow. Thank you a great product at a fair price!
Review: Great quality and did the job - AC Infinity stuff is always great, this is no exception. I’ve got two of these hooked up in the attic so I can run two exhaust fans to one outlook. They lit the air flow freely, but only in the direction I want. Allows me to pass code! Nice product, easy install and since it’s in the attic no perceived noise inside (I don’t know if it’s load next to it). Good value!

## Features

- An antidraft duct insert designed for use with range hoods, bathroom fans and other home HVAC applications.
- Features outer rubber gaskets that create an airtight seal and grip between the damper and ducts.
- Mounts horizontally or vertically to prevent backflow and debris from entering ducting.
- Galvanized steel body with spring-loaded aluminum damper blades that open with minimal airflow.
- Fit for 4 in. Duct Openings | Product Length: 5.03 inches | Finish: Powder Coat

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0842XSTV9 |
| Best Sellers Rank | #11,797 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #13 in HVAC Ducting |
| Brand | AC Infinity |
| Brand Name | AC Infinity |
| Color | Black |
| Customer Reviews | 4.6 out of 5 stars 2,006 Reviews |
| Item Dimensions | 5 x 3.81 x 3.81 inches |
| Item dimensions L x W x H | 5 x 3.81 x 3.81 inches |
| Manufacturer | AC Infinity |
| Manufacturer Part Number | AC-BDD4-B |
| Material | Alloy Steel , Aluminum |
| Material Type | Alloy Steel, Aluminum |
| Model Number | AC-BDD4-B |
| Number of Packs | 1 |
| Size | 4" |
| UPC | 819137021303 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** AC Infinity
- **Color:** Black
- **Item dimensions L x W x H:** 5 x 3.81 x 3.81 inches
- **Manufacturer:** AC Infinity
- **Material:** Alloy Steel, Aluminum
- **Size:** 4"
- **UPC:** 819137021303

## Images

![AC Infinity Backdraft Damper for 4" Ducting - Image 1](https://m.media-amazon.com/images/I/51lALiYTYEL.jpg)
![AC Infinity Backdraft Damper for 4" Ducting - Image 2](https://m.media-amazon.com/images/I/51jBoph3RiL.jpg)
![AC Infinity Backdraft Damper for 4" Ducting - Image 3](https://m.media-amazon.com/images/I/51Vig+xStqL.jpg)
![AC Infinity Backdraft Damper for 4" Ducting - Image 4](https://m.media-amazon.com/images/I/51JTxQHs5SL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Performs well. Nicely made product at a fair price!
*by S***E on April 8, 2026*

The AC Infinity products I’ve been getting all seen to be superior quality pieces (fan, collars, dampers). Couldn’t be happier. Shutters open easily but close solidly when there’s no air flow. Thank you a great product at a fair price!

### ⭐⭐⭐⭐⭐ Great quality and did the job
*by J***R on May 24, 2026*

AC Infinity stuff is always great, this is no exception. I’ve got two of these hooked up in the attic so I can run two exhaust fans to one outlook. They lit the air flow freely, but only in the direction I want. Allows me to pass code! Nice product, easy install and since it’s in the attic no perceived noise inside (I don’t know if it’s load next to it). Good value!

### ⭐⭐⭐⭐⭐ Tight seal and quality construction
*by C***. on December 2, 2025*

I needed some sort of back draft prevention for my bathroom vent fan setup because I was getting bugs and draft in my basement bathroom. These fit right up to other 4 inch ducting, and I used rubber connectors to secure these on. They look sleek, work great, and they have a great quality seal and don't let air back in. They have a double flap to prevent back drafting. I used two of them in my set up to keep each line isolated before a combining y connection

## Frequently Bought Together

- AC Infinity 4" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans
- AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 25-Feet Long for Heating Cooling Ventilation and Exhaust
- AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 8-Feet Long for Heating Cooling Ventilation and Exhaust

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*Product available on Desertcart Austria*
*Store origin: AT*
*Last updated: 2026-06-05*