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.

Read More

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.

Read More

Why Thermaduct Outdoor Solutions?

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

Read More

Why Thermaduct Indoor Solutions?

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

Read More

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.

Read More

Featured Projects:

Thermaduct Indoor Phenolic Ductwork

Industrial Facility - InspiralR & Floval

Thermaduct’s InspiralR and Floval systems were installed in an industrial facility in Missouri. This application used 7,700 square feet of pre-insulated R-6 round and flat oval ductwork with sizes up to 82 x 22 inches. This provided the installation a large reduction in weight over the entirety of the building.

Read more about the application here: Read More

Outdoor Ductwork Thermaduct

Texas University Exterior Ductwork Application - Thermaduct

Steady lead times were needed at this university application to meet deadlines without depending on multiple vendors and variable prices. When other options were needed for the 32,000 square foot system, R-12 Thermaduct was chosen because of both a material and installation cost savings over the course of the project.

Read more about the application here: Read More

Thermaduct Thermaround Outdoor Ductwork

Boston Hotel Turns to High Efficiency Duct - Thermaround

Located near the waterfront of Boston Harbor, this facility had a large portion of their HVAC system designed outdoors, exposed to the elements. R-12 Thermaround was chosen to provide weather resistant duct with a continuous cladded surface and as few as one solvent welded seam.

Read more about the application here: Read More

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 over 20 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.