GOOT Polyurethane( PU) / Polyisocyanurate( PIR) Pre-insulated HVAC Ductwork is one of the most advanced and energy saving air duct systems all over the world. It’ s cost saving and environment-friendly. The system consists of Polyurethane( PU) / Polyisocyanurate( PIR) Foam Pre-insulated Duct Panels and all kinds of accessories. Polyurethane( PU) / Polyisocyanurate( PIR) Foam Pre-insulated Duct Panels comprise rigid Polyurethane( PU) / Polyisocyanurate( PIR) insulation foam faced on both sides with a protective low vapour permeability 80 micron aluminium foil. The foam are completely CFC and HCFC free, and are of highly thermal resistance. This panel can be fabricated into all kinds of rectangular( bended) ducts, then can be assembled into HVAC ductwork by the accessories and tools on site.