---
product_id: 299460619
title: "- 4\" 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: "S/.137"
currency: PEN
in_stock: true
reviews_count: 10
category: "Ecopro Vent"
url: https://www.desertcart.pe/products/299460619-4-inch-backdraft-damper-for-straight-or-flex-duct-bathroom
store_origin: PE
region: Peru
---

# Heat-resistant -22°F to 400°F Universal fit for flex & straight ducts 4" steel damper for durability - 4" 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:** S/.137
**Availability:** ✅ In Stock

## Summary

> 🌀 Stop the backflow, start the airflow — upgrade your ventilation game!

## Quick Answers

- **What is this?** - 4" 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?** S/.137 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/299460619-4-inch-backdraft-damper-for-straight-or-flex-duct-bathroom)

## 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

- • **Built to Last:** Robust steel body paired with aluminum valve flaps ensures long-lasting performance and corrosion resistance.
- • **Ultimate Airflow Control:** Prevents backdraft effectively, maintaining optimal ventilation in kitchens, bathrooms, and HVAC systems.
- • **Seamless DIY Installation:** Press-on design fits both flexible and straight ducts with quick assembly using glue, tape, or clamps.
- • **Heat-Resistant Reliability:** Operates flawlessly in extreme temperatures from -22°F up to 400°F, perfect for indoor and outdoor use.
- • **Trusted by Pros & Homeowners:** Highly rated with 4.3 stars and praised for its quiet, efficient backflow prevention—don’t settle for less.

## Overview

The 4" Backdraft Damper by ECOPRO VENT is a durable steel and aluminum valve solution designed for both flexible and straight duct systems. Engineered for easy DIY installation and heat resistance from -22°F to 400°F, it ensures efficient backflow prevention in HVAC, kitchen, and bathroom exhaust applications. With a modern, bladeless design and trusted customer reviews, it’s the smart choice for professional-grade ventilation control.

## 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: works good - works great.stopes backflow of air
Review: Works as expected - Absolutely fantastic. You hear that vent dropping sound when turning off the range hood. Not sure why was it so hard to find at local home depot tho

## Features

- Ø4 Inch steel backdraft damper with aluminum valve.
- For use with the Ø4 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 | #340,947 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,049 in HVAC Ducting |
| Blade Material | Plastic |
| Brand Name | ECOPRO VENT |
| Collection Name | Ventilation Fans |
| Control Method | Touch |
| Controller Type | Button Control |
| Customer Reviews | 4.3 4.3 out of 5 stars (159) |
| Electric Fan Design | Exhaust Fan |
| Finish Type | Painted |
| Indoor Outdoor Usage | Indoor |
| Is Product Cordless | No |
| Item Weight | 0.16 Kilograms |
| Material | Metal |
| Model Name | 9cbd9b70-f7c7-4bf2-bb79-7c8bcd5728bd |
| Model Number | 9cbd9b70-f7c7-4bf2-bb79-7c8bcd5728bd |
| Mounting Type | Duct Mount |
| Number of Blades | 5 |
| Number of Power Levels | 1 |
| Power Source | Corded Electric |
| Recommended Uses For Product | Cooling, Exhausting |
| Room Type | Kitchen |
| Special Features | Bladeless |
| Style | Modern |
| Unit Count | 1.0 Count |
| Wattage | 60 watts |

## Product Details

- **Brand:** ECOPRO VENT
- **Controller Type:** Button Control
- **Electric fan design:** Exhaust Fan
- **Material:** Metal
- **Mounting Type:** Duct Mount
- **Power Source:** Corded Electric
- **Recommended Uses For Product:** Cooling, Exhausting
- **Room Type:** Kitchen
- **Special Feature:** Bladeless
- **Style:** Modern

## Images

![- 4" 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)
![- 4" 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)
![- 4" 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)
![- 4" 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.

## Questions & Answers

**Q: Can this be mounted horizontally?**
A: Yes, I put it in a room AC vent, to outside, it wasnt at a 90 degree angle, appr a 45 anyway, nice product, spring loaded, working great for me

**Q: Can the 12" mount vertically?  My application need is for my kitchen exhaust fan which exits into attic.**
A: NOTE: by most state's codes; nothing should be openly venting into the attic.  I can run through the attic, but needs to be vented outside.  That said, the flapper is spring loaded and is opened by the force of the airflow created by your exhaust fan.  I suspect it can be mounted vertically, just make sure the flappers are oriented so they open in the direction of airflow (upward) when the exhaust fan comes on.  Hope this helps.

## Customer Reviews

### ⭐⭐⭐⭐⭐ works good
*by D***N on November 24, 2025*

works great.stopes backflow of air

### ⭐⭐⭐⭐⭐ Works as expected
*by S***I on June 10, 2025*

Absolutely fantastic. You hear that vent dropping sound when turning off the range hood. Not sure why was it so hard to find at local home depot tho

### ⭐⭐⭐⭐⭐ Very good product
*by L***S on March 21, 2026*

Very prompt response and very good product

## Frequently Bought Together

- - 4" 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")
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- Aluminum Foil Tape, 2 inch x 65 Feet (3.9 mil), Insulation Adhesive Metal High Temperature Heavy Duty HVAC Tape, Silver for Ductwork, Dryer Vent, HVAC

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*Product available on Desertcart Peru*
*Store origin: PE*
*Last updated: 2026-03-29*