ToughGard™ fiberglass duct board is designed to be fabricated into supply and return air ductwork in commercial and residential hvac applications. Tested in accordance with UL 181, the duct board is designed to operate at air velocities up to 3,500 fpm, says the company. Its tough airstream facing surface is resistant to fabrication and jobsite installation damage, the company says. Composed of resin-bonded glass fibers with exceptional product consistency, it has generally a lower installed cost than wrapped or lined sheet metal systems, says the manufacturer.

CertainTeed Corp., 750 E. Swedesford Rd., P.O. Box 860, Valley Forge, PA 19482-0101; 800-233-8990; (website).

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