Properly Insulating Air Duct is used in unconditioned spaces such as attics, crawl spaces, garages, or unfinished basements which can help improve cooling efficiency. The Insulating Air Duct supplies conditioned air from space heating and cooling equipment to living spaces. The Insulating Air Duct is made using thin metal materials that easily conduct heat. Properly Insulating Air Duct is strong and rigid in construction and requires minimal maintenance.