• Outdoor Rooftop Ductwork Rectangular Doublewall
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  • Thermaduct InspiralR Preinsulated Round Ductwork
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Engineered Solutions Both Indoors and Out

Thermaduct now offers a family of innovative, pre-insulated duct systems that support just about any application. All of our products use the highest quality closed cell phenolic to give customers the best insulation value without taking up valuable interior or exterior space. By ordering a Thermaduct product, you can be confident that you’ll receive a lightweight, low air leakage and high R-value product that is backed by a 10 year limited warranty.


Duct, Insulation and Cladding All in One Product


Lightweight, Low Leakage Solutions


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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Frequently Asked Questions

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 Project

Food grade facility in Plymouth, Indiana. This project utilized Thermaduct's InspiralR indoor round ductwork to reduce the weight of the installation while also providing R-6 Insulated Value and near zero air leakage.

Read more about the application here: Read More

Superior Air Distribution

Thermaduct is committed to bringing the very best air distribution technology in the industry to our customers. Unsurpassed performance was our goal: to create duct systems that can not only deliver every cubic foot of air it is fed, but to treat the air with the utmost respect by not exposing it to fibrous or volatile organic chemical latent liners.

With all of our pre-insulated systems, air passes over the smooth aluminum surface of Kingspan KoolDuct’s closed cell phenolic panels, with a variety of additional lining options should an application require it.