---
product_id: 12799513
title: "Roof Vent Cap Duct Collar"
brand: "broan-nutone"
price: "$40.49"
currency: USD
in_stock: false
reviews_count: 8
url: https://www.desertcart.us/products/12799513-roof-vent-cap-duct-collar
store_origin: US
region: United States of America
---

# 4-inch duct collar size Easy retrofit installation Made in USA quality Roof Vent Cap Duct Collar

**Brand:** broan-nutone
**Price:** $40.49
**Availability:** ❌ Out of Stock

## Summary

> 🏠 Upgrade your ventilation game with the perfect fit you didn’t know you needed!

## Quick Answers

- **What is this?** Roof Vent Cap Duct Collar by broan-nutone
- **How much does it cost?** $40.49 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/12799513-roof-vent-cap-duct-collar)

## 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

- • **Retrofit Ready:** Designed for straightforward installation—even in challenging attic spaces.
- • **Durable & Sturdy:** Robust plastic construction ensures long-lasting performance without corrosion.
- • **Precision 4" Fit:** Seamlessly connects with Broan roof vent caps for airtight ducting.
- • **Secure Attachment:** Compatible with standard 4" round ducts for a reliable, leak-resistant seal.
- • **American-Made Assurance:** Crafted in the USA to meet high manufacturing standards.

## Overview

The Broan DC-4 Roof Vent Cap Duct Collar is a 4-inch plastic duct connector designed for easy and secure attachment to Broan roof vent caps. Manufactured in the USA, it ensures durability and a precise fit for standard 4" round ducts, making it ideal for both new installations and retrofit projects. Its sturdy construction and compatibility help maintain efficient ventilation while preventing leaks, favored by professionals and DIYers alike.

## Description

4" duct collar for use with Broan roof vent cap for easy attachment of 4" round duct. Product is manufactured in United States. This product meets customer requirement.

Review: Retrofit after contractor didn't use this collar - We had our bathroom remodeled and the contractor installed a Panasonic ceiling fan with the exhaust going through the roof and into a Broan hood. It would have been a whole lot easier if he bought this collar and installed it on the Broan hood right from the start. Instead, he just cut a 4.5" hole through the roof and loosely tack-nailed a 4" elbow into the side of the hole. I figured it wouldn't be to hard to install this after the fact from inside the attic. I'd seen other reviews where homowners tried to retrofit a DC-4 collar into an existing roof-mounted hood, and some reviewers expressed difficulties. It was impossible for me too, but I found a work-around. I couldn't align the tab on the DC-4 collar with the slot in the Broan housing that had already been installed on the roof. I had two problems. First, I couldn't see up into the housing to align the tab on the DC-4 with the slot in the Broan housing. Second, the contractor mounted the exterior Broan hood way off-center to the hole through the roof, meaning that I would have to cut a really huge hole in the sheathing to align the two. My work-around was to install the DC-4 backward, with the smaller crimped end through the hole in the sheathing. The crimped end extended well into the hood but did not interfere with the damper. The shoulder of the larger end of the DC-4 collar actually fit snugly against the 4.5" hole he had cut in the sheathing. I secured the DC-4 to the sheathing with (4) stainless steel 1" brackets, stainless bolts, washers, and nuts. I screwed the other ends of the brackets directly to the sheathing with 3/8" stainless screws that were short enough for a secure connection, but not long enough to penetrate the sheathing or rain/ice barrier. Then I installed a standard 4" duct elbow to the DC-4 collar with the male end inserted into wide end of the DC-4, securing it with foil tape. I ran a length of insulated flex duct to connect the fan to the elbow that was attached to the DC-4. This retrofit solution worked out well for my situation. The connection through the roof is very secure, even without a direct metal-to-metal connection between the DC-4 collar and the slots in the Broan hood. Another option would be to go up on the roof, remove the Broan hood, connect the collar directly to the slot as designed, and re-install the hood. I chose not to do that because I didn't want to risk creating a leak by disturbing the shingles and exterior caulk, which I knew were weathertight. As for the DC-4 collar, it is very sturdy and high quality. I highly recommend it, even if you do have to install it backwards!
Review: Works well as long as you have good access to the vent - This is pricey for what it is, but as long as there is enough access through the hole in your roof to line up the collar, it was effortless. If the hole cut in the roof is not squared up or big enough to access the bottom of the vent then I foresee it being a headache. If you’re working in a tight space, I also advise clamping your vent hose on to the collar first and adjusting it after getting the collar placed into the roof vent.

## Features

- 4" duct collar for use with Broan roof vent cap for easy attachment of 4" round duct
- Product is manufactured in United States
- This product meets customer requirement

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004UHQXTQ |
| Best Sellers Rank | #223,560 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #503 in HVAC Ducting |
| Brand Name | Broan-NuTone |
| Color | No Color |
| Customer Reviews | 4.6 4.6 out of 5 stars (125) |
| Exterior Finish | No Color |
| Global Trade Identification Number | 00026715135066 |
| Included Components | Painting Supplies;Caulk & Sealants;duct-tape |
| Item Dimensions | 4 x 4 x 3 inches |
| Item Type Name | Roof Vent Cap Duct Collar |
| Item Weight | 1.6 ounces |
| Manufacturer | Broan-NuTone |
| Manufacturer Warranty Description | Warranty |
| Material Type | Plastic |
| Model Number | DC4 |
| Number of Pieces | 1 |
| Size | No Size |
| Thread Size | thread.size |
| UPC | 026715135066 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Broan-NuTone
- **Color:** No Color
- **Exterior Finish:** No Color
- **Global Trade Identification Number:** 00026715135066
- **Item Weight:** 1.6 ounces
- **Item dimensions L x W x H:** 4 x 4 x 3 inches
- **Material:** Plastic
- **Number of Pieces:** 1
- **Size:** No Size
- **Thread Size:** thread.size

## Images

![Roof Vent Cap Duct Collar - Image 1](https://m.media-amazon.com/images/I/91egHIS8pQL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Retrofit after contractor didn't use this collar
*by B***H on August 27, 2023*

We had our bathroom remodeled and the contractor installed a Panasonic ceiling fan with the exhaust going through the roof and into a Broan hood. It would have been a whole lot easier if he bought this collar and installed it on the Broan hood right from the start. Instead, he just cut a 4.5" hole through the roof and loosely tack-nailed a 4" elbow into the side of the hole. I figured it wouldn't be to hard to install this after the fact from inside the attic. I'd seen other reviews where homowners tried to retrofit a DC-4 collar into an existing roof-mounted hood, and some reviewers expressed difficulties. It was impossible for me too, but I found a work-around. I couldn't align the tab on the DC-4 collar with the slot in the Broan housing that had already been installed on the roof. I had two problems. First, I couldn't see up into the housing to align the tab on the DC-4 with the slot in the Broan housing. Second, the contractor mounted the exterior Broan hood way off-center to the hole through the roof, meaning that I would have to cut a really huge hole in the sheathing to align the two. My work-around was to install the DC-4 backward, with the smaller crimped end through the hole in the sheathing. The crimped end extended well into the hood but did not interfere with the damper. The shoulder of the larger end of the DC-4 collar actually fit snugly against the 4.5" hole he had cut in the sheathing. I secured the DC-4 to the sheathing with (4) stainless steel 1" brackets, stainless bolts, washers, and nuts. I screwed the other ends of the brackets directly to the sheathing with 3/8" stainless screws that were short enough for a secure connection, but not long enough to penetrate the sheathing or rain/ice barrier. Then I installed a standard 4" duct elbow to the DC-4 collar with the male end inserted into wide end of the DC-4, securing it with foil tape. I ran a length of insulated flex duct to connect the fan to the elbow that was attached to the DC-4. This retrofit solution worked out well for my situation. The connection through the roof is very secure, even without a direct metal-to-metal connection between the DC-4 collar and the slots in the Broan hood. Another option would be to go up on the roof, remove the Broan hood, connect the collar directly to the slot as designed, and re-install the hood. I chose not to do that because I didn't want to risk creating a leak by disturbing the shingles and exterior caulk, which I knew were weathertight. As for the DC-4 collar, it is very sturdy and high quality. I highly recommend it, even if you do have to install it backwards!

### ⭐⭐⭐⭐⭐ Works well as long as you have good access to the vent
*by J***A on May 20, 2025*

This is pricey for what it is, but as long as there is enough access through the hole in your roof to line up the collar, it was effortless. If the hole cut in the roof is not squared up or big enough to access the bottom of the vent then I foresee it being a headache. If you’re working in a tight space, I also advise clamping your vent hose on to the collar first and adjusting it after getting the collar placed into the roof vent.

### ⭐⭐⭐⭐⭐ roof vent coupling
*by M***E on July 28, 2023*

Ordered this replacement for my kitchen and bathroom fans to vent out the roof collars. The roofers disconnected the vents and threw away the old connectors and just left the duct work laying in the attic. It was easy to attach these replacements

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.us/products/12799513-roof-vent-cap-duct-collar](https://www.desertcart.us/products/12799513-roof-vent-cap-duct-collar)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-04-30*