... -40 degree 3.OEM provide Split pressurized Heat pipe solar collector heating System1,Size:58/1800,47 ... borosilicate 3.3, thickness: 2.0mm, Three target type.Insulation: rock wool or import PU,hailstone resistance: 25mmbracket ... 500L, special minds can designed like swimming pool heat system. Heat Pipe Solar Collector Detailed SpecificationItemPartsDescriptionManifold boxManifold Outer Case1001 Aluminum ...