Insulated, Uninsulated & Rigid Ducts

This type of insulated duct is made of a triple lamination of aluminum foil, polyester and metalized polyester film permanently bonded to a coated spring steel wire helix. The uninsulated duct is made of a triple lamination of aluminum foil, polyester and metalized polyester film permanently bonded to a coated spring steel wire helix. Rigid ducts, or spiral ducts, are metal pipes used in permanent ventilation, heating and air conditioning systems, as well as large-scale dust and exhaust extraction plants.