---
product_id: 473734772
title: "\" Inch Backdraft Damper for Straight or Flex Duct. Bathroom Exhaust Fan. Kitchen Hood Exhaust Fan and Different Dryer Fan Backflow Preventer. Steel Damper with Aluminum Valve Flaps (4\")"
brand: "ecopro vent"
price: "NT$2387"
currency: TWD
in_stock: true
reviews_count: 5
category: "Ecopro Vent"
url: https://www.desertcart.tw/products/473734772-inch-backdraft-damper-for-straight-or-flex-duct-bathroom-exhaust
store_origin: TW
region: Taiwan
---

# Heat-resistant -22°F to 400°F Universal fit for flex & straight ducts 4-inch steel damper " Inch Backdraft Damper for Straight or Flex Duct. Bathroom Exhaust Fan. Kitchen Hood Exhaust Fan and Different Dryer Fan Backflow Preventer. Steel Damper with Aluminum Valve Flaps (4")

**Brand:** ecopro vent
**Price:** NT$2387
**Availability:** ✅ In Stock

## Summary

> 🚀 Upgrade your airflow game with the ultimate backdraft damper!

## Quick Answers

- **What is this?** " Inch Backdraft Damper for Straight or Flex Duct. Bathroom Exhaust Fan. Kitchen Hood Exhaust Fan and Different Dryer Fan Backflow Preventer. Steel Damper with Aluminum Valve Flaps (4") by ecopro vent
- **How much does it cost?** NT$2387 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/473734772-inch-backdraft-damper-for-straight-or-flex-duct-bathroom-exhaust)

## Best For

- ecopro vent enthusiasts

## Why This Product

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

## Key Features

- • **Backflow Blocker Pro:** Prevents unwanted air backflow, ensuring optimal ventilation and energy efficiency.
- • **DIY-Friendly Assembly:** Quick press-on design compatible with glue, tape, or clamps for hassle-free setup.
- • **Seamless HVAC Integration:** Effortlessly fits both flexible and straight 4-inch ducts for versatile installation.
- • **Durable Aluminum & Steel Build:** Premium materials guarantee long-lasting performance and corrosion resistance.
- • **Extreme Temperature Resilience:** Engineered to withstand harsh conditions from -22°F up to 400°F, perfect for indoor and outdoor use.

## Overview

The 4-inch ECOPRO VENT Backdraft Damper combines durable steel and aluminum construction with universal compatibility for flexible and straight ducts. Designed for HVAC, bathroom, kitchen, and dryer exhaust systems, it prevents backflow efficiently while enduring temperatures from -22°F to 400°F. Easy to install and built to last, it’s the smart choice for professional-grade ventilation.

## Description

Our products are made out of high quality plastic and coated steel. Guaranteed long life and durability. good compatibility with other ECOPRO VENT products.

Review: Nice
Review: works great.stopes backflow of air

## Features

- Ø Inch steel backdraft damper with aluminum valve.
- For use with the Ø Inch Round flexible or straight Pipe Ducting systems
- Quick and easy to assemble - DIY Press on chosen duct - flex or straight - and by using montage glue. tape or steel clamps tighten the connection.
- Perfect for heating, cooling or air conditioning - HVAC. Bathroom and kitchen air exhaust.
- Heat-resistant from: -22 °F to 400°F. / Perfect for indoor and outdoor use

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08XXT326K |
| Best Sellers Rank | #128,781 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #167 in Heating & Cooling Ducting Products |
| Brand | ECOPRO VENT |
| Color | white |
| Customer Reviews | 4.3 4.3 out of 5 stars (156) |
| Date First Available | 23 March 2021 |
| Item Weight | 159 g |
| Material | Aluminum |
| Package Dimensions | 10.9 x 10.31 x 9.4 cm; 159 g |
| Power / Wattage | 60 watts |

## Product Details

- **Brand:** ECOPRO VENT
- **Colour:** white
- **Controller type:** Button Control
- **Electric fan design:** Exhaust Fan
- **Finish type:** Painted
- **Material:** Aluminum
- **Mounting type:** Duct Mount
- **Power source:** Corded Electric
- **Recommended uses for product:** Cooling
- **Wattage:** 60 watts

## Images

![" Inch Backdraft Damper for Straight or Flex Duct. Bathroom Exhaust Fan. Kitchen Hood Exhaust Fan and Different Dryer Fan Backflow Preventer. Steel Damper with Aluminum Valve Flaps (4") - Image 1](https://m.media-amazon.com/images/I/71jb4lQgBQL.jpg)
![" Inch Backdraft Damper for Straight or Flex Duct. Bathroom Exhaust Fan. Kitchen Hood Exhaust Fan and Different Dryer Fan Backflow Preventer. Steel Damper with Aluminum Valve Flaps (4") - Image 2](https://m.media-amazon.com/images/I/71HGhwLU+dL.jpg)
![" Inch Backdraft Damper for Straight or Flex Duct. Bathroom Exhaust Fan. Kitchen Hood Exhaust Fan and Different Dryer Fan Backflow Preventer. Steel Damper with Aluminum Valve Flaps (4") - Image 3](https://m.media-amazon.com/images/I/71EoEjiXnxL.jpg)
![" Inch Backdraft Damper for Straight or Flex Duct. Bathroom Exhaust Fan. Kitchen Hood Exhaust Fan and Different Dryer Fan Backflow Preventer. Steel Damper with Aluminum Valve Flaps (4") - Image 4](https://m.media-amazon.com/images/I/41ImBU0ARSL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by J***W on 10 January 2025*

Nice

### ⭐⭐⭐⭐⭐ Review
*by D***N on 24 November 2025*

works great.stopes backflow of air

### ⭐ Review
*by B***D on 8 December 2024*

Arrived damaged. Doesn’t seal

## Frequently Bought Together

- ECOPRO VENT - 8" Inch Backdraft Damper for Straight or Flex Duct. Bathroom Exhaust Fan. Kitchen Hood Exhaust Fan and Different Dryer Fan Backflow Preventer. Steel Damper with Aluminum Valve Flaps
- EesTeck 4" (Diameter) Adjustable 304 Stainless Steel Duct Clamps Hose Clamp Pipe Clamp Air Ducting Clamp worm drive hose clamps (4Pcs, 91mm-114mm)
- Dryer Vent Hose, 4'' Insulated Flexible Duct 16FT with 2 Duct Clamps, Heavy-Duty Three Layer Protection for HVAC Ventilation, Duct Fan Systems

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**Shop now:** [https://www.desertcart.tw/products/473734772-inch-backdraft-damper-for-straight-or-flex-duct-bathroom-exhaust](https://www.desertcart.tw/products/473734772-inch-backdraft-damper-for-straight-or-flex-duct-bathroom-exhaust)

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-03-21*