---
product_id: 1889812
title: "Broan-NuTone 636 Steel Roof Vent Cap for 3\" and 4\" Round Duct, For Bathroom Ventilation Fans, Black"
brand: "broan-nutone"
price: "₨34526"
currency: LKR
in_stock: true
reviews_count: 8
category: "Broan Nu Tone"
url: https://www.desertcart.lk/products/1889812-broan-nutone-636-steel-roof-vent-cap-for-3-4
store_origin: LK
region: Sri Lanka
---

# Fits 3" & 4" round ducts seamlessly Built-in bird screen & backdraft damper Steel construction for durability Broan-NuTone 636 Steel Roof Vent Cap for 3" and 4" Round Duct, For Bathroom Ventilation Fans, Black

**Brand:** broan-nutone
**Price:** ₨34526
**Availability:** ✅ In Stock

## Summary

> 🏠 Elevate your ventilation game with stealthy, durable protection!

## Quick Answers

- **What is this?** Broan-NuTone 636 Steel Roof Vent Cap for 3" and 4" Round Duct, For Bathroom Ventilation Fans, Black by broan-nutone
- **How much does it cost?** ₨34526 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/1889812-broan-nutone-636-steel-roof-vent-cap-for-3-4)

## Best For

- broan-nutone enthusiasts

## Why This Product

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

## Key Features

- • **Pest-Proof Protection:** Built-in bird screen blocks birds and small critters from invading your ductwork—no more unexpected guests.
- • **Smart Airflow Control:** Integrated backdraft damper prevents unwanted air backflow, keeping your space fresh and energy-efficient.
- • **Rock-Solid Steel Build:** Premium alloy steel with sleek black powder coat finish ensures long-lasting durability and weather resistance.
- • **Silent & Efficient Venting:** Optimizes bathroom and home ventilation fan performance while minimizing noise for a peaceful environment.
- • **Universal Fit, Zero Hassle:** Designed to fit both 3" and 4" round ducts, making installation on pitched roofs quick and effortless.

## Overview

The Broan-NuTone 636 Steel Roof Vent Cap is a high-quality, durable vent cap designed for 3" and 4" round ducts. Featuring a robust steel construction with a black powder coat finish, it includes a built-in backdraft damper and bird screen to prevent air backflow and pest intrusion. Ideal for bathroom and home ventilation fans, it offers easy installation on pitched roofs and enhances airflow efficiency while ensuring long-lasting performance.

## Description

The Broan-NuTone 636 Steel Roof Vent Cap is an easy-to-install vent for ventilation fans (bathroom, rec room, home gym, etc.). This vent cap provides reliable roof top ventilation and features both a back draft damper and bird screen, preventing outside air from entering the home and birds and small animals from entering duct work. Compatible with 3" and 4" ducting. Not suitable for dryer venting or flat roofs.

Review: A fantastic buy! - The Broan-NuTone 636 Roof Vent Cap is excellent! It fits perfectly on 3" and 4" ducts and provides strong, durable protection against weather. Installation was straightforward, and the black finish looks sleek. Great for bathroom ventilation—no leaks or issues so far. Highly recommend for reliable performance and quality construction. A fantastic buy!
Review: Well made - I was a bit skeptical as to exactly what I was getting but this turned out to be a very well made product . I was pleasantly surprised. I only need it to vent hot air from an 'A' roof that gets very hot in the summer Highly recommended

## Features

- HIGH-QUALITY ROOF CAP: Steel roof cap for use with bathroom ventilation fans to maximize the air and sound performance of your bath fan
- RELIABLE: Includes a built-in, backdraft damper and bird screen to provide a dependable roof cap you can rely on
- DURABLE: Constructed of steel with a black powder coat finish to ensure durability and lasting use
- EASY INSTALLATION: Roof cap is designed to fit with either a 3" or 4" round duct to provide a simple pitched roof installation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000BQW6LE |
| Best Sellers Rank | #32,504 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #31 in HVAC Ducting |
| Brand | Broan-NuTone |
| Brand Name | Broan-NuTone |
| Color | Black |
| Compatible with Vehicle Type | Passenger Car |
| Customer Reviews | 4.5 out of 5 stars 750 Reviews |
| Fit Type | Universal Fit |
| Global Trade Identification Number | 00026715000609 |
| Included Components | Roof Cap, damper, birdscreen |
| Item Diameter | 3 Inches |
| Item Type Name | Roof Vent Cap Only |
| Item Weight | 1.6 Pounds |
| Manufacturer | Broan-NuTone |
| Manufacturer Warranty Description | 1 Year |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Number of Pieces | 1 |
| Shape | Round |
| UPC | 696335226149 026715000609 049403210210 735090814458 |
| Unit Count | 1.0 Count |
| Vehicle Service Type | Passenger Car |

## Product Details

- **Brand:** Broan-NuTone
- **Color:** Black
- **Fit Type:** Universal Fit
- **Material:** Alloy Steel
- **Vehicle Service Type:** Passenger Car

## Images

![Broan-NuTone 636 Steel Roof Vent Cap for 3" and 4" Round Duct, For Bathroom Ventilation Fans, Black - Image 1](https://m.media-amazon.com/images/I/61gecajauuL.jpg)

## Available Options

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

## Questions & Answers

**Q: What is the function of a roof vent cap? Does it keep rain water out of house, or just keep animals out?**
A: It does both keeps rain and animals and bugs out. You have to buy the vent collar separately though. So you can connect your exhaust hose or dryer hose to it because some vents on the roof are just for ventilation in your attic space. Them vents you can’t hook your exhaust too. Proper ventilation is key to saving money in your house. I’m going threw the same problem at the time. Make sure you never just vent your fan to your attic space that’s a no no. Also if your fan is anywhere by water make sure your fan is wired inline with a GFCI it’s just the way to do it. Hope this helps you out

**Q: I have a 12 in wide metal roof and I need to put a vent  to vent out heat from the roof . Would the brown 636 work to do this.**
A: It could probably be made to work, but that's not what this vent cap was intended for.  It has a flap in it that is normally closed, that would have to be removed.  (This vent cap is normally used for a bathroom vent fan that will push the flap open when the fan is running.)  Depending upon the style of metal roof you have, it may be difficult to get this vent cap sealed properly.  This one is designed to have its upper flashing edge under shingles.  If your "12 in wide metal" is in horizontal rows, that may work.  Also, this vent cap is significantly smaller than what it normally used for roof vents.  It will probably take three times as many of these as regular roof vents, to vent a given area of roof.  In short, yes it probably could be used for a roof vent, but it would not be ideal.

**Q: Can the damper get frozen shut in the winter?**
A: It's possible, but not too likely.  And even if it does, when the bath fan is turned on there will probably be enough air leakage that it would thaw the flap in a minute or two.

**Q: pulled flapper,  replaced cheesy strip at front of flap and  added to other three sides with 3/16 thick, 3/8 wide foam weather strip.  is this ok?**
A: Maybe

## Customer Reviews

### ⭐⭐⭐⭐⭐ A fantastic buy!
*by G***D on April 28, 2025*

The Broan-NuTone 636 Roof Vent Cap is excellent! It fits perfectly on 3" and 4" ducts and provides strong, durable protection against weather. Installation was straightforward, and the black finish looks sleek. Great for bathroom ventilation—no leaks or issues so far. Highly recommend for reliable performance and quality construction. A fantastic buy!

### ⭐⭐⭐⭐⭐ Well made
*by J***S on February 6, 2026*

I was a bit skeptical as to exactly what I was getting but this turned out to be a very well made product . I was pleasantly surprised. I only need it to vent hot air from an 'A' roof that gets very hot in the summer Highly recommended

### ⭐⭐⭐⭐⭐ Perfect Roof Vent Cap for Bathroom Fans
*by P***N on June 20, 2025*

I absolutely love this Broan-NuTone Steel Roof Vent Cap! 🖤 It's amazing for 3" and 4" round ducts, ideal for bathroom ventilation fans. The installation was a breeze - super easy and hassle-free. The sleek black design adds a stylish touch to my roof. Highly recommend this for anyone needing a reliable vent cap! 👌🏼 #BathroomUpgrade #EasyInstallation #HighlyRecommend

## Frequently Bought Together

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-03-18*