solar collector
1. solar keymark approved
2. high quality
solar collector
Material of manifold: alunimum alloy;
vacuum tube: 58*1800mm three high tube with heat pipe
Max pressure: 6 bar
Coating of vacuum tube: AIN-SS-Cu
Heat pipe : anti-freezing > -35 degree
Manifold (interior): red copper
Material of frame: 2.0mm high quality aluminium alloy
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