TD Pre-Insulated Aluminium Ducts is developed specially for the air distribution in HVAC fields and the answer to economical, technical, and constructive question. Many different materials and systems such as composite, PVC, etc had been developed as an alternative to the galvanized sheet metal used traditionally. TD Insulated Aluminium Ducts is the solution. It is a sandwich panel composed of a layer base from good fire retardant rigid polyurethane or polyisocyanurate foam covering both sides with Aluminium foil, the Aluminium guarantees sturdiness and withstand corrosion in long term use. Its application has been gradually extended to all types of air distribution system such as industrial, commercial and civil.