---
product_id: 356224464
title: "YOUNTHYE 4 Inch Backdraft Damper, 2 Pack Spring-Loaded One-Way Airflow Duct Damper, Backflow Preventer Duct Insert for Range Hood, Bathroom Fan and Home HVAC Ventilation"
brand: "younthye"
price: "€ 33.91"
currency: EUR
in_stock: true
category: "Younthye"
url: https://www.desertcart.ie/products/356224464-younthye-4-inch-backdraft-damper-2-pack-spring-loaded-one
store_origin: IE
region: Ireland
---

# 4" Diameter Backflow Prevention Durable Steel YOUNTHYE 4 Inch Backdraft Damper, 2 Pack Spring-Loaded One-Way Airflow Duct Damper, Backflow Preventer Duct Insert for Range Hood, Bathroom Fan and Home HVAC Ventilation

**Brand:** younthye
**Price:** € 33.91
**Availability:** ✅ In Stock

## Summary

> 🚀 Seal the Deal on Airflow Control!

## Quick Answers

- **What is this?** YOUNTHYE 4 Inch Backdraft Damper, 2 Pack Spring-Loaded One-Way Airflow Duct Damper, Backflow Preventer Duct Insert for Range Hood, Bathroom Fan and Home HVAC Ventilation by younthye
- **How much does it cost?** € 33.91 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/356224464-younthye-4-inch-backdraft-damper-2-pack-spring-loaded-one)

## Best For

- younthye enthusiasts

## Why This Product

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

## Key Features

- • **Compact Design:** Space-saving 4" size fits standard duct openings.
- • **Premium Materials:** Constructed from galvanized steel and aluminum for longevity.
- • **Automatic Operation:** Flap opens and closes to block unwanted drafts effortlessly.
- • **Versatile Applications:** Perfect for range hoods, bathroom fans, and HVAC systems.
- • **Effortless Installation:** Easily push into ducting for a seamless fit.

## Overview

The 4 Inch Backdraft Damper is a premium, durable solution designed to prevent backflow and unwanted drafts in your home ventilation systems. Made from high-quality galvanized steel and aluminum, this easy-to-install damper is perfect for range hoods and bathroom fans, ensuring optimal airflow and efficiency.

## Description

YOUNTHYE 4 Inch Backdraft Damper, 2 Pack Spring-Loaded One-Way Airflow Duct Damper, Backflow Preventer Duct Insert for Range Hood, Bathroom Fan and Home HVAC Ventilation - desertcart.com

## Features

- Designed for 4 Inch Ducts: Each backdraft damper fits 4 in / 100 mm duct openings and measures 3.5 in / 88 mm long with a 0.5 mm / 0.02 in wall thickness. Please confirm your duct size before purchase.
- Helps Reduce Backdraft: The spring-loaded flaps open with exhaust airflow and close when airflow stops or reverses, helping reduce unwanted drafts, odors, debris and outside air from entering the duct.
- Durable Mixed-Metal Construction: Built with a galvanized steel body, aluminum flaps, and stainless steel spring and axis for everyday ventilation use in home HVAC ducting applications.
- For Common Ventilation Setups: Suitable for 4 inch range hood ducts, bathroom exhaust fans and home HVAC ventilation systems. Not designed for plastic ducts.
- 2 Pack for Multiple Projects: Includes two 4 inch inline duct dampers for installing in separate ventilation ducts or keeping one ready for another setup. Insert into the duct and align with the airflow direction for proper operation.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B093QBB96J |
| Best Sellers Rank | #660,605 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,789 in HVAC Ducting |
| Blade Material | Plastic |
| Brand Name | YOUNTHYE |
| Color | silver |
| Control Method | Touch |
| Controller Type | Button Control |
| Customer Reviews | 4.4 4.4 out of 5 stars (61) |
| Electric Fan Design | Exhaust Fan |
| Finish Type | Metallic |
| Included Components | 2 x 4 Inch Backdraft Damper |
| Indoor Outdoor Usage | Indoor |
| Installation Type | Insertion |
| Is Electric | No |
| Is Product Cordless | No |
| Item Type Name | 4 Inch Backdraft Damper |
| Material | Stainless Steel |
| Model Name | 4 Inch Backdraft Damper |
| Model Number | WENCHENG-4ID |
| Mounting Type | Flush Mount |
| Number of Blades | 2 |
| Power Source | Battery Powered |
| Recommended Uses For Product | Ventilating |
| Room Type | Bathroom |
| Size | 4 inches |
| Special Features | Lightweight, Portable |
| Style | Modern |
| UPC | 696629987305 |
| Unit Count | 2.0 Count |

## Product Details

- **Brand:** YOUNTHYE
- **Color:** silver
- **Controller Type:** Button Control
- **Electric fan design:** Exhaust Fan
- **Mounting Type:** Flush Mount
- **Power Source:** Battery Powered
- **Recommended Uses For Product:** Ventilating
- **Room Type:** Bathroom
- **Special Feature:** Lightweight, Portable
- **Style:** Modern

## Images

![YOUNTHYE 4 Inch Backdraft Damper, 2 Pack Spring-Loaded One-Way Airflow Duct Damper, Backflow Preventer Duct Insert for Range Hood, Bathroom Fan and Home HVAC Ventilation - Image 1](https://m.media-amazon.com/images/I/613Etgg1iiL.jpg)

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.ie/products/356224464-younthye-4-inch-backdraft-damper-2-pack-spring-loaded-one](https://www.desertcart.ie/products/356224464-younthye-4-inch-backdraft-damper-2-pack-spring-loaded-one)

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-06-17*