The next generation of Thermaduct™ has arrived!  Thermaround™, a pre-Insulated, low leakage duct solution for applications requiring spiral duct is now available in St. Louis.  Offering the same great vinyl cladded protection as rectangular Thermaduct™, Thermaround™ is an excellent solution for the outdoor elements. This high R-value system offers an R-12 insulated value and extremely low air leakage. Thermaround™ uses the same UV stable 1000 micron vinyl cladding for a durable solution that will naturally shed water. In the interior, air passes over a smooth aluminum ...

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Thermaround St. Louis, Spiral Outdoor Duct