Pre-insulated Duct Panel (PID) is sandwich structure material incorporating rigid closed-cell foam (PU, PIR, or Phenolic Foam) as the insulation core with aluminum facing on both sides. It is a newly innovative duct material using in Heating, Ventilation, Air-conditioning System. system consists of pre-insulated duct panels, fabrication equipment, tools, accessories and technical support Technical and commercial support for consultants and contractors.