1.Good thermal insulation 2.Sound insulation 3.Light weight 4.shandongwanlong at gmail com SpecificationsHVAC air duct heat insulation panel/ Pre-insulated air ducting panel:1.Widely used in central air-conditioning ducting, insulation workshops, cleaning rooms2. Material:Aluminium Foild+ phenolic/polystyrene(XPS)+ Aluminium Foild3.Confirm to ISO,BS/SGS4.Supply phenolic foam board to beijing " ...