Features 1) Inner tank stainless steel (SUS304 -2B) a) Thickness 0.4mm b) Cr 17.00 - 19.00% c) Ni 8.00 - 10.00% 2) Outer tank stainless steel a) Thickness 0.33mm b) Insulating layer foaming polyurethane c) Thickness 45mm 3) Thermal transfer rate 0.022W/m.K
solar collector