---
product_id: 497238403
title: "AC Infinity 100mm Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 100mm Ducting in Range Hoods and Bathrooms Fans, 4-Inch"
brand: "ac infinity"
price: "₪102"
currency: ILS
in_stock: false
reviews_count: 5
url: https://www.desertcart.co.il/products/497238403-ac-infinity-100mm-backdraft-damper-one-way-airflow-ducting-insert
store_origin: IL
region: Israel
---

# Spring-loaded aluminum blades for effortless airflow Rubber gaskets ensure airtight seal Galvanized steel body for durability AC Infinity 100mm Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 100mm Ducting in Range Hoods and Bathrooms Fans, 4-Inch

**Brand:** ac infinity
**Price:** ₪102
**Availability:** ❌ Out of Stock

## Summary

> 🚫💨 Stop drafts, start comfort — the smart airflow guardian your home deserves!

## Quick Answers

- **What is this?** AC Infinity 100mm Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 100mm Ducting in Range Hoods and Bathrooms Fans, 4-Inch by ac infinity
- **How much does it cost?** ₪102 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.il](https://www.desertcart.co.il/products/497238403-ac-infinity-100mm-backdraft-damper-one-way-airflow-ducting-insert)

## 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

- • **Universal 4-Inch Fit:** Perfectly designed for standard 4-inch duct openings, compatible with range hoods, bathroom fans, and more.
- • **Durable & Sleek Build:** Galvanized steel body with powder coat finish ensures long-lasting performance and modern aesthetics.
- • **Airtight Seal Technology:** Dual rubber gaskets create a secure grip and block cold drafts, bugs, and debris from entering your ducts.
- • **Flexible Mounting Options:** Mount horizontally or vertically to suit any ducting setup without compromising efficiency.
- • **Effortless One-Way Airflow:** Spring-loaded blades open with minimal airflow, preventing backdrafts seamlessly.

## Overview

The AC Infinity 100mm Backdraft Damper is a premium duct insert designed to prevent backflow and debris in 4-inch duct systems. Featuring a galvanized steel body, spring-loaded aluminum blades, and dual rubber gaskets, it ensures airtight sealing and effortless one-way airflow. Ideal for range hoods, bathroom fans, and HVAC applications, it mounts horizontally or vertically for versatile installation.

## Description

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 Product Description A ventilation ducting tool designed for insertion into 4” ducting to prevent cold drafts and debris from flowing into ventilation systems. Built to be embedded in ducts, the backdraft damper is made of sturdy galvanized steel and features two rings of outer rubber gaskets. This enables it to grip your ducting with an airtight seal in either a horizontal or vertical orientation. The butterfly damper blades are made of aluminum and are equipped with a light spring that folds with minimal airflow. Applications The spring-loaded antidraft damper is built for heavy-duty performance in applications like overhead range hoods in kitchens, bathroom fans and tumble dryers. It can be fully or partially inserted into your duct work using the rubber rings to hold itself in place. Other one-way airflow uses include keep pilot lights burning in water heaters and keeping debris from entering inline duct fans in grow tents. Product Identification Manufacturer AC Infinity Inc. Product Name Backdraft Damper, 4" Product Model AC-BDD4-B UPC Code 819137021303 Product and Mounting Dimensions Duct Opening Size 4" Product Length 5.03 in. (12.8 cm) Product Performance and Technical Specs Whole Body Material Steel Shutter Material Aluminum Color Black Finish Powder Coat

Review: This company puts out "quality" items Something we dont see to often anymore. This item works great when exhaust fan turns on and closes nicely when fan is off. I like the rubber gasket Keeps cold air from coming back into house BigBox stores carry similar item BUT not as well made and more money Highly recommend
Review: 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

## 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 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 122,385 in DIY & Tools ( See Top 100 in DIY & Tools ) 356 in Ducting |
| Customer Reviews | 4.4 4.4 out of 5 stars (529) |
| Date First Available | 10 Dec. 2022 |
| Item Package Quantity | 1 |
| Item Weight | 318 g |
| Item model number | AC-BDD4-B |
| Manufacturer | AC Infinity |
| Part Number | AC-BDD4-B |
| Product Dimensions | 12.7 x 9.68 x 9.68 cm; 318 g |
| Size | 4 Inch |

## Images

![AC Infinity 100mm Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 100mm Ducting in Range Hoods and Bathrooms Fans, 4-Inch - Image 1](https://m.media-amazon.com/images/I/41GStZDT5uL.jpg)
![AC Infinity 100mm Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 100mm Ducting in Range Hoods and Bathrooms Fans, 4-Inch - Image 2](https://m.media-amazon.com/images/I/41HC3QycSVL.jpg)
![AC Infinity 100mm Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 100mm Ducting in Range Hoods and Bathrooms Fans, 4-Inch - Image 3](https://m.media-amazon.com/images/I/41gdXE8dzvL.jpg)
![AC Infinity 100mm Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 100mm Ducting in Range Hoods and Bathrooms Fans, 4-Inch - Image 4](https://m.media-amazon.com/images/I/41nAGzohYML.jpg)
![AC Infinity 100mm Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 100mm Ducting in Range Hoods and Bathrooms Fans, 4-Inch - Image 5](https://m.media-amazon.com/images/I/51JTxQHs5SL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***R on 8 March 2025*

This company puts out "quality" items Something we dont see to often anymore. This item works great when exhaust fan turns on and closes nicely when fan is off. I like the rubber gasket Keeps cold air from coming back into house BigBox stores carry similar item BUT not as well made and more money Highly recommend

### ⭐⭐⭐⭐⭐ Review
*by C***. on 2 December 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

### ⭐⭐⭐⭐ Review
*by Y***F on 23 November 2024*

Good

## 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 Israel*
*Store origin: IL*
*Last updated: 2026-01-31*