Longyan UNT Industry Co., Ltd. (formerly known as "Xiamen UNT Duct Material Co., Ltd.") was established by several co-founders who have more than 17 years’ experience in PU & PIR Foam Industry. UNT is the Chinese leading manufacturer of Polyurethane (PU)/ Polyisocyanurate (PIR) Foam Pre-insulated Duct Panel for HVAC system, PU/ PIR Foam Pipe Insulation, PVC Profiles for air ducting and the related pre-insulated duct accessories and tools.