... solar collector 2012 hot sell heat pipe evacuated tube solar thermal collector (CE, ISO9001,CGC,Keymark ) Features:1. High Efficient:Excellent ... ).Fastness: stainless steel screws7)Solar absorptance 93%;heat emittance 7%8)Tank capacity:135,150,165,200,250,300Liter StructureAll-glass ... ) 2012 hot sell heat pipe evacuated or vacuum tube solar thermal collector (CE, ISO9001,CGC,Keymark )