Flexible Blanket

Fibrous glass duct wrap insulation is designed for application to the exteriors of commercial and residential sheet metal heating, ventilating, and air-conditioning ducts and plenums operating at temperatures between 40˚F (4˚C) and 250˚F (121˚C). Duct wrap insulation reduces heat loss or gain through duct walls, conserving energy and controlling moisture condensation. Fibrous glass duct wrap insulations are useful in situations where acoustical performance is not an issue.

Fibrous glass duct wrap insulations are flexible, resilient, light-density blankets of glass fibers factory-laminated to vapor retarder facings. These products are easily cut and fitted to achieve a neat, thermally effective insulation blanket over the exteriors of rectangular, round, oval, or irregularly shaped ducts.

Fibrous glass duct wrap insulations are manufactured to comply with ASTM C 1290, Flexible Fibrous Glass Blanket Insulation USed to Externally Insulate HVAC Ducts.

Insulation Boards

Fibrous glass insulation boards are also available for application to the outside of sealed sheet metal ducts, housings, and plenums. These are available unfaced, or with reinforced foil (FSK) or all-service jacket (ASJ) vapor retarder facings, in a range of densities and thicknesses. Some are flexible enough to conform to curved surfaces such as large round or oval sheet metal ducts.

Fibrous glass insulation boards can be used in applications operating within the temperature range of 0°F (-18°C) to 450°F (232°C).

Fibrous glass insulation boards are manufactured to comply with ASTM C 612, Standard Specification for Mineral Fiber Block and Board Thermal Insulation.