---
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: "€ 46.85"
currency: EUR
in_stock: true
category: "Younthye"
url: https://www.desertcart.es/products/356224464-younthye-4-inch-backdraft-damper-2-pack-spring-loaded-one
store_origin: ES
region: Spain
---

# Fits 4-inch ducts perfectly Durable mixed-metal build Spring-loaded one-way airflow control 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:** € 46.85
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your airflow game—no more backdraft blues!

## 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?** € 46.85 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/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

- • **Built to Last:** Galvanized steel body with aluminum flaps and stainless steel springs ensures long-term durability and reliable performance.
- • **Double Pack Convenience:** Two dampers included to cover multiple projects or keep a spare on hand, ensuring you’re always prepared.
- • **Smart Backdraft Prevention:** Spring-loaded flaps automatically block unwanted drafts, odors, and debris, keeping your indoor air fresh and clean.
- • **Precision Fit for 4-Inch Ducts:** Seamlessly integrates with standard 4-inch HVAC and range hood systems for hassle-free installation.
- • **Versatile Ventilation Solution:** Ideal for range hoods, bathroom fans, and home HVAC systems—engineered for professional-grade airflow control.

## Overview

The YOUNTHYE 4 Inch Backdraft Damper is a robust, spring-loaded one-way airflow device designed for 4-inch ducts. Crafted from galvanized steel, aluminum, and stainless steel, it prevents backdrafts, odors, and debris from entering your ventilation system. Perfect for range hoods, bathroom fans, and HVAC setups, this 2-pack offers durable, easy-to-install solutions that enhance indoor air quality and system 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.es/products/356224464-younthye-4-inch-backdraft-damper-2-pack-spring-loaded-one](https://www.desertcart.es/products/356224464-younthye-4-inch-backdraft-damper-2-pack-spring-loaded-one)

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-07-10*