---
product_id: 372302199
title: "4\" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans"
brand: "ac infinity"
price: "S$69"
currency: SGD
in_stock: true
reviews_count: 1
category: "Ac Infinity"
url: https://www.desertcart.sg/products/372302199-4-backdraft-damper-one-way-airflow-ducting-insert-with-spring
store_origin: SG
region: Singapore
---

# spring-loaded airflow blades airtight rubber gasket seal 4-inch precision fit 4" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans

**Brand:** ac infinity
**Price:** S$69
**Availability:** ✅ In Stock

## Summary

> 🌀 Keep your airflow fresh and your space flawless with AC Infinity’s smart backdraft damper!

## Quick Answers

- **What is this?** 4" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans by ac infinity
- **How much does it cost?** S$69 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/372302199-4-backdraft-damper-one-way-airflow-ducting-insert-with-spring)

## 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 aluminum blades open effortlessly with minimal airflow, maximizing ventilation efficiency while preventing backdrafts.
- • **Versatile Mounting Options:** Designed for both horizontal and vertical installation, adapting seamlessly to your HVAC setup in kitchens or bathrooms.
- • **Airtight Rubber Gasket Seal:** Durable outer rubber gaskets create a secure, airtight connection that blocks unwanted air and debris infiltration.
- • **Seamless 4" Duct Integration:** Engineered for a perfect fit in standard 4-inch ducting, ensuring hassle-free installation and optimal airflow.
- • **Robust Galvanized Steel Build:** Powder-coated galvanized steel body guarantees long-lasting durability and corrosion resistance for years of reliable performance.

## Overview

The AC Infinity 4" Backdraft Damper is a high-performance one-way airflow duct insert designed for range hoods and bathroom fans. Featuring spring-loaded aluminum blades and airtight rubber gaskets, it prevents backflow and debris entry while ensuring smooth ventilation. Its galvanized steel construction and versatile mounting options make it a durable, easy-to-install solution for maintaining optimal indoor air quality.

## 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: Amazing product - Amazing

## 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 |
|---------------|-------|
| Manufacturer | AC Infinity |
| Part number | AC-BDD4-B |
| Item Weight | 318 g |
| Product Dimensions | 12.7 x 9.68 x 9.68 cm; 318 g |
| Item model number | AC-BDD4-B |
| Size | 4 Inch |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |

## Images

![4" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans - Image 1](https://m.media-amazon.com/images/I/51lALiYTYEL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Amazing product
*by J***M on 15 August 2025*

Amazing

## 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.sg/products/372302199-4-backdraft-damper-one-way-airflow-ducting-insert-with-spring](https://www.desertcart.sg/products/372302199-4-backdraft-damper-one-way-airflow-ducting-insert-with-spring)

---

*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-03-17*