---
product_id: 454125780
title: "6 Inch Backdraft Damper Back Draft Vent Duct Shutter Blocker, Backflow Ducting Insert One-Way Airflow Preventer with Inline Springs Loaded Folding Blades, HVAC Extractor Range Fan Hood Deflector"
brand: "miuwauer"
price: "$44.61"
currency: USD
in_stock: true
reviews_count: 13
category: "Miuwauer"
url: https://www.desertcart.us/products/454125780-6-inch-backdraft-damper-back-draft-vent-duct-shutter-blocker
store_origin: US
region: United States of America
---

# Spring-loaded one-way airflow Withstands temps up to 50°C Galvanized steel & aluminum build 6 Inch Backdraft Damper Back Draft Vent Duct Shutter Blocker, Backflow Ducting Insert One-Way Airflow Preventer with Inline Springs Loaded Folding Blades, HVAC Extractor Range Fan Hood Deflector

**Brand:** miuwauer
**Price:** $44.61
**Availability:** ✅ In Stock

## Summary

> 🌬️ Stop drafts before they start — the smart airflow gatekeeper your HVAC needs!

## Quick Answers

- **What is this?** 6 Inch Backdraft Damper Back Draft Vent Duct Shutter Blocker, Backflow Ducting Insert One-Way Airflow Preventer with Inline Springs Loaded Folding Blades, HVAC Extractor Range Fan Hood Deflector by miuwauer
- **How much does it cost?** $44.61 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/454125780-6-inch-backdraft-damper-back-draft-vent-duct-shutter-blocker)

## Best For

- miuwauer enthusiasts

## Why This Product

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

## Key Features

- • **Premium Durability:** Galvanized steel frame with aluminum flaps and stainless steel springs ensure long-lasting, rust-resistant performance.
- • **Tool-Free Installation:** Push-in design with horizontal/vertical mounting flexibility makes setup quick and hassle-free for any professional or DIYer.
- • **Airtight Seal Technology:** High-density foam weatherstrip and rubber gasket create a near-perfect seal to block cold air and unwanted drafts.
- • **Effortless Airflow Control:** Spring-loaded folding blades open automatically at low air volumes, preventing backdrafts and maintaining optimal ventilation.
- • **Universal HVAC Compatibility:** Designed for AC, dryer vents, exhaust fans, range hoods, and more—fits flexible and rigid ducts seamlessly.

## Overview

This 6-inch backdraft damper features a galvanized steel body, aluminum flaps, and stainless steel springs designed to withstand temperatures up to 50°C. Its spring-loaded folding blades provide one-way airflow control, preventing cold air backflow and improving ventilation efficiency. Easy to install in both flexible and rigid ducts, it’s ideal for residential and commercial HVAC systems, range hoods, and exhaust fans.

## Description

desertcart.com: 6 Inch Backdraft Damper Back Draft Vent Duct Shutter Blocker, Backflow Ducting Insert One-Way Airflow Preventer with Inline Springs Loaded Folding Blades, HVAC Extractor Range Fan Hood Deflector : Automotive

Review: Good quality - This is a good quality, well built dampener. It uses a high density foam weatherstrip on the back for the wings to rest against. This helps seal it up nicely when not in use. This is FAR better than the typical Chinese junk you see. Very happy and will recommend to all.
Review: Air duct directional damper - Works great. Nice seal and very quiet

## Features

- 【Quality Material】The backdraft damper is made of galvanized steel, the flap leaves are made of aluminu, and the axis and spring are made of stainless steel, which can withstand temperatures up to 50°C
- 【Practical Features】The air duct choke prevents cold air or wind from entering the ventilation duct. The backflow flap opens and closes automatically at low air volumes. The valve is equipped with a smooth-running spring and a rubber gasket that create an airtight seal and grip between the damper and ducts
- 【Easy Installation 】The backflow prevention valve is installed by pushing it into the ventilation duct to make it as mobile as possible. When the valve flap is installed horizontally, the position of the spring should be horizontal so that the valve flap can be opened and closed optimally. This also applies to vertical installation. Same for vertical installation
- 【Multiple Usages】The draft blocker is designed for use in AC, dryer vent, exhaust, extractor or range hoods, heating systems, fans, vents and other residential, commercial and industrial HVAC applications. The back draft damper can be inserted into a flexible or non-flexible ventilation duct
- 【Needs Attention 】This airflow regulating backdraft shutter is installed on the TD lip to improve ventilation by preventing air circulation when the fan is not in use. Plastic pipes are of different sizes and cannot be used with plastic pipes

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09R1HSG44 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #160,009 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #367 in HVAC Ducting |
| Customer Reviews | 4.2 4.2 out of 5 stars (172) |
| Date First Available | January 24, 2022 |
| Item Weight | 7 ounces |
| Manufacturer | Miuwauer |
| Package Dimensions | 7.09 x 6.46 x 3.62 inches |
| Size | 6 Inch |

## Images

![6 Inch Backdraft Damper Back Draft Vent Duct Shutter Blocker, Backflow Ducting Insert One-Way Airflow Preventer with Inline Springs Loaded Folding Blades, HVAC Extractor Range Fan Hood Deflector - Image 1](https://m.media-amazon.com/images/I/61bukIagPZL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good quality
*by A***R on September 8, 2022*

This is a good quality, well built dampener. It uses a high density foam weatherstrip on the back for the wings to rest against. This helps seal it up nicely when not in use. This is FAR better than the typical Chinese junk you see. Very happy and will recommend to all.

### ⭐⭐⭐⭐⭐ Air duct directional damper
*by D***Y on July 7, 2025*

Works great. Nice seal and very quiet

### ⭐⭐⭐⭐ Exactly what I was looking for 👍
*by L***R on October 14, 2024*

I really like the seal inside that the dampers seat against when closed. Fits perfectly in the 4" exhaust duct. Using it to seal out outside air from entering the indoor greenhouse through the exhaust fan duct.

## Frequently Bought Together

- 6 Inch Backdraft Damper Back Draft Vent Duct Shutter Blocker, Backflow Ducting Insert One-Way Airflow Preventer with Inline Springs Loaded Folding Blades, HVAC Extractor Range Fan Hood Deflector
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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-03*