---
product_id: 256682427
title: "Broan-NuTone 636 Steel Roof Vent Cap for 3\" and 4\" Round Duct, For Bathroom Ventilation Fans, Black"
brand: "broan-nutone"
price: "783658₫"
currency: VND
in_stock: true
url: https://www.desertcart.vn/products/256682427-broan-nutone-636-steel-roof-vent-cap-for-3-4
store_origin: VN
region: Vietnam
---

# Integrated birdscreen & damper Fits 3" & 4" round ducts Durable alloy steel build Broan-NuTone 636 Steel Roof Vent Cap for 3" and 4" Round Duct, For Bathroom Ventilation Fans, Black

**Brand:** broan-nutone
**Price:** 783658₫
**Availability:** ✅ In Stock

## Summary

> 🏠 Elevate your ventilation game with stealthy strength!

## 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?** 783658₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/256682427-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

- • **Built to Last:** Premium alloy steel ensures long-lasting durability and weather resistance.
- • **Made in the USA:** Crafted domestically for trusted quality and reliability.
- • **Sleek & Stealthy:** Matte black finish blends seamlessly with modern roofing aesthetics.
- • **Stay Fresh & Protected:** Includes a damper to prevent backdrafts and a birdscreen to keep pests out.
- • **Perfect Fit Flexibility:** Compatible with both 3-inch and 4-inch round ducts for versatile installation.

## Overview

The Broan-NuTone 636 Steel Roof Vent Cap is a robust, black alloy steel accessory designed for bathroom ventilation systems. Compatible with 3" and 4" round ducts, it features an integrated damper and birdscreen to optimize airflow while preventing pests and backdrafts. Manufactured in the USA, it combines durability with sleek design for professional-grade ventilation solutions.

## 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.

## Features

- This item is Broan-Nutone 636 Roof Vent Cap Only
- Used For Appliance Parts & Accessories,Miscellaneous Accessories
- The product is manufactured in United States
- Compatible with either a 3 in. or 4 in. round duct

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Broan-NuTone |
| Part number | 636 |
| Item Weight | 726 g |
| Item model number | 636 |
| Size | No Size |
| Color | Black |
| Finish | Black |
| Material | Alloy Steel |
| Shape | Round |
| Power source type | AC |
| Item Package Quantity | 1 |
| Number Of Pieces | 1 |
| Cutting Diameter | 3 Inches |
| Included components | Roof Cap, damper, birdscreen |
| Batteries Included? | No |
| Batteries Required? | No |
| Item diameter | 3 Inches |

## Product Details

- **Colour:** Black
- **Material:** Alloy Steel
- **Brand:** Broan-NuTone
- **Fit type:** Universal Fit
- **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/51+ICBj7SbL.jpg)

## 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

## Frequently Bought Together

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-05-23*