Thermatuff Pre-INsulated phenolic - Maximize HVAC Efficiency with Pre-Insulated Duct and Duct Liner
With over two decades of phenolic fabrication experience, Thermaduct offers advanced solutions for rectangular and round ductwork systems, combining performance and ease of installation. Our Thermatuff system, introduced in 2026 provides robust pre-insulated phenolic base for both indoor and outdoor applications, eliminating the need for separate insulation.
Thermatuff is a lightweight, durable materials that enhance both thermal efficiency and installation ease, ensuring low air leakage, and superior durability in the field. Whether you need duct systems for new construction or retrofit projects, Thermaduct's Thermatuff phenolic system can be used as a pre-insulated duct system or as an insulated duct liner for sheet metal ductwork. Our goal is to help you design commercial HVAC systems that meet the highest industry standards!
Features of Thermaduct's Thermatuff:
- Duct System - Flanged and Unflanged Connection Options
- Duct Liner - Glueless Application for Easy Installation in Sheet Metal Duct
- High Insulated Values - R6, R8 & R12
- Smooth 80 Micron Aluminum facing on both sides
- Complies with SMACNA Phenolic Duct Construction Standards Latest Addition
- ASTM E84 25/50 Compliant
- NFPA 90A Compliant
- Lightweight - Ranging Up to 75% Lighter than Metal
- Low Air Leakage
- Lining Options Available for Special Applications
The Thermatuff Difference
Thermatuff panels provide a lightweight, pre-insulated duct solution that reduces handling effort compared to double-wall or externally insulated metal ductwork. High thermal performance is built into the panel, eliminating the need for separate insulation and jacketing after installation. The reduced system weight simplifies lifting, staging, and support requirements, while the thicker aluminum facings improve durability during fabrication, transport, and installation. When combined with standard SMACNA-based construction and reinforcement practices, Thermatuff delivers consistent thermal performance with a cleaner, more efficient installation process.
Pair with our round or flat oval ductwork for a highly efficient HVAC system that will reduce energy costs now and into the future. We even offer brief online installer training to ensure your project gets off on the right foot!
Advantages of Thermatuff for pre-insulated phenolic applications
thick 80 micron aluminum Facing
Engineered to handle field conditions
Low AIR Leakage, High Efficiency INSULATION
Improved insulation values, low leakage connections.
THERMATUFF™ Silicone Free Sealant
Thermatuff Uses our High Performance Silicone Free Sealant
REDUCE LABOR IN THE FIELD WITH LIGHTWEIGHT THERMATUFF PHENOLIC DUCTWORK
Thermaduct’s Thermatuff solution is engineered to meet the specific needs of commercial HVAC systems, offering superior thermal performance, ease of installation, and durability in the field. Whether you’re designing for indoor or outdoor applications, Thermatuff delivers cutting-edge, insulated solutions to optimize air distribution, reduce energy loss, and provide long-lasting durability.
For more information on our family of round or rectangular products, talk to your Local Thermaduct Representative or Contact Us below to get more information for your next project!
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Thermatuff is changing the game for phenolic ductwork, both as a pre-insulalated duct system and as a duct liner for sheet metal ductwork! Sign up below to receive more information!