PHI Pre-Insulated Aluminium Ducts

General standard:
Size: 2000/4000*1200(L*W) CompressiveStrength:450kpa
thickness:20mm(also provide 25mm and 30mm) Water Absorption:2.90%
Alum.Foil Thickness:0.08mm(both sides) DimensionStability:0.53%(70℃+/-2℃）
Density:71kg/m3 Oxygen Index: 57.80%
Fire Retardant: A Smoke Density: 2
Thermal Conductivity: 0.018W/m.k Smoke Toxicity: 25
(Average Temperature 25℃+/-2℃)

Advantage :
Lower heat conductivity, higher thermal efficiency;
High Fire-Protection rating
Low density, light weight;
Easy Installation
Foamed with CFC free materials, environment protective;
Hermetic seal ensures little air leakage;
With aluminum foil reinforced on both side, its corrosion protective, hygiene, and has a beautiful appearance;
Foamed with closed-cell structure, its water-proof and sound-insulated.
No protrudent flange on the connections, it can save a lot of building space.