Pre-Insulated High Efficiency Air Distribution For Indoor and Outdoor Applications

Thermaduct provides high quality pre-insulated ductwork systems to both interior and exterior installations. Our family of pre-insulated products are designed and manufactured to increase the efficiency of the application with higher R-values and lower air leakage rates, while at the same time increase installation efficiency with lightweight duct systems that require no additional insulation or wrapping. Whether on the roof, or inside the building a lower carbon, pre-insulated duct can cut installation time and save on long term energy costs.

Outdoor Insulated Systems

Ductwork Designed for the Elements

Indoor Insulated Systems

Lightweight, Low Leakage Solutions

Designed for Aesthetics. Engineered for Performance

Thermaround is now available with a metal exterior cladding with a range of enhanced weather resistant finishes pairing phenolic insulation with complementary color choices.

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See How Others are finding benefits with pre-insulated ductwork

Sites across the United States are finding benefits with pre-insulated phenolic systems from Thermaduct. See how schools, hospitals and more are finding lower carbon, energy saving HVAC solutions.

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Why Thermaduct Outdoor Solutions?

As energy codes push the required insulation values higher and higher, the need for better outdoor duct solutions is growing.

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Why Thermaduct Indoor Solutions?

Low air leakage, IAQ duct solutions increase the energy efficiency and health of your building. Thermaduct is here to help.

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Learn More About Phenolic Ductwork

Find out more about how our family of products can save you time, money and alleviate headaches on your next project.

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Featured Projects:

exposed Commercial flat oval installation

Office Application - InspiralR & Floval

Thermaduct’s InspiralR and Floval systems were installed in a four story office building in Ohio. This application used 57,000 square feet of pre-insulated R-6 round and flat oval ductwork and utilized its paintable exterior. This provided the installation a large reduction in weight over the entirety of the building.

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Thermaduct outdoor duct system

Montana Medical College - Thermaduct

In this new construction project in central Montana, our rectangular Thermaduct outdoor system provided this medical college facility with the benefits of double wall ductwork with the weight savings provided by our Airtruss reinforced phenolic.

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Exterior Round Insulated Duct System

Massachusetts Pharmaceutical Facility - Thermaround

In 2022, Thermaround played a role in helping a Massachusetts pharmaceutical production facility lower its carbon footprint and increase the energy efficiency of their building. Over 8000 square feet of our patented Thermaround system was utilized to give the application’s HVAC system a smooth aluminum interior with an R-12 insulated value.

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Outdoor Pre-Insulated Ductwork Thermaduct

Superior Air Distribution

Thermaduct is a nationwide manufacturer of outdoor and indoor phenolic pre-insulated ductwork with our fabrication headquartered in Perrysburg, Ohio. Our story began in 2004 when we were first introduced to premium performance pre-insulated Phenolic Ductwork, an alternative material to traditional sheet metal that offered lower embodied carbon, consistent insulated values and lower air leakage without the need to insulate ductwork. We saw the benefits of this lightweight material and began to re-center our company around this insulated duct technology as it entered the United States.

With a focus on helping the construction industry realize a lower carbon future, Thermaduct’s pre-insulated phenolic products have provided both outdoor and indoor applications increased efficiency for long term benefits for the installation. Our products, including Thermaduct, Thermaround, InspiralR and Floval, meet the needs of many applications that require rectangular, round or flat oval insulated ductwork.

With nearly two decades of experience, Thermaduct products are now fabricated in SMACNA contractor facilities across the United States and Canada and sold through a network of manufacturers representatives who have joined us on our mission to bring low carbon duct solutions to the market. As the market turns to decarbonization and more energy efficient products, we continue to be a driving force in changing the HVAC Industry for a better future with phenolic duct.