Heat pipe solar collector 1)SPF,EN12975,Solar Keymark 2)High efficiency than flat plat 3)Aluminium stand 4)Antifreezing 1. Jinyi heat pipe solar collector technical date:1) Model no.: JCH-58-10/12/15/18/20/24/302) Quantity of tubes: 10,12, 15, 18, 20, 24, 30.3) Seperately packing?: Yes (tube and manifold seperately)4) Technology: Metal heat pipe with twin glass vacuum tube5) Total length of tube ...