The Different Types of Roofing Materials and Which One Suits Each Home RV Repair Shop Milwaukee Area RV Service Greater Chicago RV Repair Patio Roof Sydney & Central Coast: The 2026 Roundup of Styles and Roof Financing Options in Ohio Campo Roof. RecPro's AC Unit Extending Air Duct Is The Perfect Upgrade For Thick Roofs Details: Plastic Body Color: Gray Blue Connection Cover Accordion Style Construction Can Extend From 2 " To 10" In Length Mounting Hardware Included Works With 3400 Model AC Unit Extends Air Duct Channel To Fit Roofs Thicker Than 2 Adds Up To 10" To Roof Thickness Measurements: Diameter: 10" If you're dealing with a thicker RV roof, then chances are you might notice an insufficient amount of cool air in your RV. Don't struggle with staying cool whether you're at the campground, on the road, or spending time off grid. Instead, invest in RecPro's AC Unit Extending Air Duct. It's designed to extend the air duct channel for RecPro's 3400 model, ensuring a proper fit and efficient operation on thicker RV roofs. It'll smoothly expand from 2 " to 10" for flexible installation on roofs thicker than 2 " without custom fabrication. You want a long term, long lasting product for your RV. That's why we've made this extending air duct with durable plastic to resist cracking and deformation regardless of varying temperatures and mobile conditions. It will ensure an airtight connection between the AC and the plenum to help reduce energy loss and maintain consistent cooling performance. Don't worry. This extending air duct comes with the necessary mounting hardware for a straightforward setup, allowing you to get back on the road in no time.