---
product_id: 356224465
title: "MIVIDE 2Pack 4 inch Backdraft Damper Duct, One Way Airflow Ducting Insert for Ducting in Range Hoods, Bathrooms Fans and kitchen Fan"
brand: "mivide"
price: "A$43"
currency: AUD
in_stock: true
reviews_count: 8
category: "Mivide"
url: https://www.desertcart.com.au/products/356224465-mivide-2pack-4-inch-backdraft-damper-duct-one-way-airflow
store_origin: AU
region: Australia
---

# One-way airflow with smooth spring action 4 inch diameter precision fit Galvanized & stainless steel durability MIVIDE 2Pack 4 inch Backdraft Damper Duct, One Way Airflow Ducting Insert for Ducting in Range Hoods, Bathrooms Fans and kitchen Fan

**Brand:** mivide
**Price:** A$43
**Availability:** ✅ In Stock

## Summary

> 💨 Stop the Backdraft, Start the Fresh Flow!

## Quick Answers

- **What is this?** MIVIDE 2Pack 4 inch Backdraft Damper Duct, One Way Airflow Ducting Insert for Ducting in Range Hoods, Bathrooms Fans and kitchen Fan by mivide
- **How much does it cost?** A$43 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/356224465-mivide-2pack-4-inch-backdraft-damper-duct-one-way-airflow)

## Best For

- mivide enthusiasts

## Why This Product

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

## Key Features

- • **Smart Airflow Control:** Automatic backdraft prevention with smooth-running spring mechanism that opens only with outgoing air, blocking unwanted reverse flow.
- • **Perfect Fit, Zero Hassle:** Designed for seamless insertion into standard 4-inch ducts, ensuring quick and secure installation without modifications.
- • **Double Pack, Double Protection:** Two dampers included to cover multiple vents or dual exhaust setups, giving you comprehensive airflow management.
- • **Versatile Ventilation Solution:** Ideal for range hoods, bathroom fans, dryer ducts, and HVAC systems—protect your space from toxic fumes and energy loss.
- • **Built to Last, Built to Perform:** Crafted from galvanized steel with stainless steel springs for superior corrosion resistance and long-term reliability.

## Overview

The MIVIDE 2Pack 4 inch Backdraft Dampers are precision-engineered duct inserts made from galvanized steel and stainless steel springs. Designed for effortless installation in standard 4-inch ventilation pipes, these dampers ensure one-way airflow to prevent backdrafts and unwanted air infiltration. Perfect for residential and industrial use in range hoods, bathroom fans, and dryer ducts, they offer durable, reliable performance and come in a convenient two-pack for versatile applications.

## Description

MIVIDE 2Pack 4 inch Backdraft Damper Duct, One Way Airflow Ducting Insert for Ducting in Range Hoods, Bathrooms Fans and kitchen Fan - desertcart.com

Review: Work as expected. Price half that of big box stores. - I vent 2 bathrooms into a single vent out the roof. I needed to install these on each side to prevent backdraft. I disconnect the pipe at the roof vent and installed these then turned on the fan before reconnecting. The flappers opened and worked as expected. Added benefit was the gasket on the flapper. I'm sure the seal is not perfect however it is good enough for what i need. They fit into the existing 4" duct work without issues. Availability was key, local stores did not have anything like these in stock.
Review: Very nice addition - Used for two fans into one exhaust, works perfectly

## Features

- PRODUCT SIZE: Diameter 100MM/4 inch, length 88MM/3.5 inch, thickness 0.5MM/0.02 inch. Please confirm the size before purchase
- HIGH QUALITY MATERIALS: Galvanized steel damper is made of quality galvanized steel, and the axis and spring are made of stainless steel, product Very solid and well made, good tension on the spring
- EASY TO INSTALLATION: The backflow flap is installed by inserting it into the ventilation pipe until it stops. The position of the spring should be horizontal for horizontal installations so that it can open and close optimally. The backdraft shutter is installed so that the damper blades open only in the outflowing air direction
- PRACTICAL DESIGN: Backdraft damper has a smooth-running spring. The backflow flap opens and closes automatically at low air volumes. Backdraft damper can ventilate an area to avoid toxic fumes from building up
- WIDE RANGE OF USAGES: These draft blocker set can be widely applied in exhaust fan pipe, a dryer duct, range hoods, heating ducts, vents and other residential and industrial applications

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B093KJ34Q8 |
| Best Sellers Rank | #54,279 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #73 in HVAC Ducting |
| Blade Length | 4 inches |
| Blade Material | Plastic |
| Brand | MIVIDE |
| Brand Name | MIVIDE |
| Collection Name | Industrial |
| Color | 4 inch |
| Control Method | Touch |
| Controller Type | Button Control |
| Customer Reviews | 4.5 out of 5 stars 200 Reviews |
| Electric Fan Design | Exhaust Fan |
| Electric fan design | Exhaust Fan |
| Finish Type | Metallic |
| Included Components | 2 Backdraft dampers |
| Indoor Outdoor Usage | Indoor |
| Installation Type | insertion |
| Item Dimensions D x W x H | 0.02"D x 3.46"W x 3.94"H |
| Item Weight | 0.26 kg |
| Manufacturer | Pei hong |
| Material | Stainless Steel |
| Model Name | MIVIDE |
| Model Number | 613966160321 |
| Mounting Type | Wall Mount |
| Number of Blades | 2 |
| Part Number | 613966160321 |
| Power Source | Corded Electric |
| Product Dimensions | 0.02"D x 3.46"W x 3.94"H |
| Recommended Uses For Product | Exhausting |
| Room Type | Kitchen, Office |
| Special Features | Backdraft damper, wide range of usages |
| Style | Industrial |
| Switch Type | Push Button |
| UPC | 613966160321 |
| Unit Count | 2 Count |

## Product Details

- **Brand:** MIVIDE
- **Color:** 4 inch
- **Electric fan design:** Exhaust Fan
- **Mounting Type:** Wall Mount
- **Power Source:** Corded Electric
- **Product Dimensions:** 0.02"D x 3.46"W x 3.94"H
- **Recommended Uses For Product:** Exhausting
- **Room Type:** Kitchen, Office
- **Special Feature:** Backdraft damper, wide range of usages
- **Style:** Industrial

## Images

![MIVIDE 2Pack 4 inch Backdraft Damper Duct, One Way Airflow Ducting Insert for Ducting in Range Hoods, Bathrooms Fans and kitchen Fan - Image 1](https://m.media-amazon.com/images/I/71cfrMR07XL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Work as expected. Price half that of big box stores.
*by D***R on November 24, 2025*

I vent 2 bathrooms into a single vent out the roof. I needed to install these on each side to prevent backdraft. I disconnect the pipe at the roof vent and installed these then turned on the fan before reconnecting. The flappers opened and worked as expected. Added benefit was the gasket on the flapper. I'm sure the seal is not perfect however it is good enough for what i need. They fit into the existing 4" duct work without issues. Availability was key, local stores did not have anything like these in stock.

### ⭐⭐⭐⭐⭐ Very nice addition
*by C***E on March 17, 2026*

Used for two fans into one exhaust, works perfectly

### ⭐⭐⭐⭐⭐ Nice product
*by A***D on May 10, 2024*

Easy to install perfect for a 2dryer home. Keeps them from steaming up when one or the other isnt running

## Frequently Bought Together

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-08-15*