Explore top-quality options in vent and duct insulation at F.W. Webb. An insulation blanket is a type of ductwork often used in home attics, commercial buildings, or warehouses to improve air quality and save energy in an HVAC/R system. Use our helpful filters to sort blanket and reflective insulation products by size, material, wall thickness, and R factor. Browse vent and duct insulation from trusted makers Owens Corning and Reflectix to find the right fit for your air ventilation needs.