Thermaduct is a pre-engineered outdoor duct system that incorporates the duct, insulation and cladding all in one high-performance product, company officials say. This pre-insulated duct offers extremely low air-leakage rates and is available in a variety of thicknesses between R-8 and R-24. Thermaduct’s rigid insulation core is protected with a 1,000-micron, ultraviolet stable, titanium infused vinyl cladding that withstands the outdoor elements with unmatched quality and durability.

Thermaduct; (855) 809-6903; www.thermaduct.com.