--- product_id: 235169912 title: "Exhaust Fan Roof Curb- 19.5” square x 20” high, 18 gauge galvanized steel construction, vented bolt together flat roof curb (19.5\" square)" brand: "captive-aire" price: "$800.81" currency: USD in_stock: true reviews_count: 7 category: "Captive Aire" url: https://www.desertcart.us/products/235169912-exhaust-fan-roof-curb-19-5-square-x-20-high store_origin: US region: United States of America --- # 19.5” square base fits 21” fans Bolt-together flat-pack design 18 gauge galvanized steel durability Exhaust Fan Roof Curb- 19.5” square x 20” high, 18 gauge galvanized steel construction, vented bolt together flat roof curb (19.5" square) **Brand:** captive-aire **Price:** $800.81 **Availability:** ✅ In Stock ## Summary > 🏗️ Elevate your ventilation game with the ultimate roof curb upgrade! ## Quick Answers - **What is this?** Exhaust Fan Roof Curb- 19.5” square x 20” high, 18 gauge galvanized steel construction, vented bolt together flat roof curb (19.5" square) by captive-aire - **How much does it cost?** $800.81 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/235169912-exhaust-fan-roof-curb-19-5-square-x-20-high) ## Best For - captive-aire enthusiasts ## Why This Product - Trusted captive-aire brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last, Built to Protect:** Constructed from robust 18 gauge galvanized steel, offering superior corrosion resistance and long-term durability in all weather conditions. - • **Precision Fit for Peak Performance:** Engineered to perfectly support 21” square base exhaust fans, ensuring seamless integration with top models like DU33HFA and DR-50HFA. - • **Customizable Options for Every Roof:** Pitched curbs available on request, adapting to your unique roofing needs and enhancing ventilation efficiency. - • **Compact Shipping, Maximum Efficiency:** Flat-pack shipping means less storage space and lower freight costs—perfect for streamlined project logistics. - • **Effortless Assembly, Minimal Downtime:** Innovative bolt-together design ships flat, reducing shipping costs and enabling quick, hassle-free installation on site. ## Overview This 19.5” square by 20” high roof curb is crafted from durable 18 gauge galvanized steel, designed to support 21” square base exhaust fans including popular models like DU33HFA and DR-50HFA. Its bolt-together flat-pack design ensures compact shipping and quick installation, making it an essential upgrade for professional HVAC projects seeking reliability and efficiency. ## Description Designed to properly support the weight of the exhaust fan for roof mounted applications. For use with fans that have a 21” square base. Compatible with fan models DU33HFA, DU50HFA, DR-33HFA, DR-50HFA. DD11FA, DD13FA Bolt together design ships flat for compact transportation and storage. Minimal field installation is required. Constructed of 18 gauge galvanized steel. Pitched curbs available upon request. Review: High quality curb - High quality curb. Review: well constructed - comes in flat cardboard box about 30"x30"x3" comes with fabric bag with nuts and bolts it had a few extra bolts and nuts come with small tube of silver colored silicone for sealing the seams of the panels when assembling unit. there are small vent slots in the sides of the exhaust fan curb I wish it did not have these slots but it will still work the roofer will cover these slots up when the new roof is installed ## Features - Designed to properly support the weight of the exhaust fan for roof mounted applications. - For use with fans that have a 21” square base. Compatible with fan models DU33HFA, DU50HFA, DR-33HFA, DR-50HFA. DD11FA, DD13FA - Bolt together design ships flat for compact transportation and storage. Minimal field installation is required. - Constructed of 18 gauge galvanized steel. - Pitched curbs available upon request. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B082MTCTV9 | | Best Sellers Rank | #328,239 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #972 in Household Ventilation Fans | | Brand | CAPTIVE-AIRE | | Brand Name | CAPTIVE-AIRE | | Customer Reviews | 4.7 out of 5 stars 41 Reviews | | Drawer Type | Storage | | Finish Type | Painted | | Finish Types | Painted | | Form Factor | Drop-In | | Installation Type | Drop-In | | Item Dimensions D x W x H | 20"D x 19.5"W x 20"H | | Item Weight | 30 Pounds | | Manufacturer | Captive Aire Systems | | Manufacturer Part Number | Roof Curb | | Material | galvanized steel | | Material Type | galvanized steel | | Mounting Type | Roof Mount | | Product Dimensions | 20"D x 19.5"W x 20"H | | UPC | 797435416949 | ## Product Details - **Brand:** CAPTIVE-AIRE - **Drawer Type:** Storage - **Finish Type:** Painted - **Form Factor:** Drop-In - **Material:** galvanized steel ## Images ![Exhaust Fan Roof Curb- 19.5” square x 20” high, 18 gauge galvanized steel construction, vented bolt together flat roof curb (19.5" square) - Image 1](https://m.media-amazon.com/images/I/81FVfe-1IZL.jpg) ![Exhaust Fan Roof Curb- 19.5” square x 20” high, 18 gauge galvanized steel construction, vented bolt together flat roof curb (19.5" square) - Image 2](https://m.media-amazon.com/images/I/81OePdyeVGL.jpg) ![Exhaust Fan Roof Curb- 19.5” square x 20” high, 18 gauge galvanized steel construction, vented bolt together flat roof curb (19.5" square) - Image 3](https://m.media-amazon.com/images/I/61eT6z8jLmL.jpg) ![Exhaust Fan Roof Curb- 19.5” square x 20” high, 18 gauge galvanized steel construction, vented bolt together flat roof curb (19.5" square) - Image 4](https://m.media-amazon.com/images/I/41rH5mu+Z4L.jpg) ![Exhaust Fan Roof Curb- 19.5” square x 20” high, 18 gauge galvanized steel construction, vented bolt together flat roof curb (19.5" square) - Image 5](https://m.media-amazon.com/images/I/41trurlnwjL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ High quality curb *by A***T on December 16, 2025* High quality curb. ### ⭐⭐⭐⭐⭐ well constructed *by T***Y on March 22, 2020* comes in flat cardboard box about 30"x30"x3" comes with fabric bag with nuts and bolts it had a few extra bolts and nuts come with small tube of silver colored silicone for sealing the seams of the panels when assembling unit. there are small vent slots in the sides of the exhaust fan curb I wish it did not have these slots but it will still work the roofer will cover these slots up when the new roof is installed ### ⭐⭐⭐⭐⭐ Perfectly made *by R***N on September 9, 2020* Perfect fit easy to install no problem at all ## Frequently Bought Together - Exhaust Fan Roof Curb- 19.5” square x 20” high, 18 gauge galvanized steel construction, vented bolt together flat roof curb (19.5" square) - Restaurant Canopy Hood Grease Rated Exhaust Fan- High Speed Direct Drive Centrifugal Upblast Exhaust Fan with speed control- 21" Base, 0.50 HP 115 Volt Single Phase Motor, 900-1500 CFM (DU50HFA) - Grease Box for Restaurant Canopy Hood Exhaust Fan (Includes Down Spout) --- ## 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/235169912-exhaust-fan-roof-curb-19-5-square-x-20-high](https://www.desertcart.us/products/235169912-exhaust-fan-roof-curb-19-5-square-x-20-high) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-16*