... 2.SOLAR KEYMARK,SRCC,CE 3.Antifreezing -40C 500L Split Pressurized Solar Water Heater System Descriptions:Split ... ±5C)Idle sunning property parametersY=220~260m2.C/KWAverage heat loss coefficientULT=0.6~0.7W ... /(m2.C)Bracket:2.0mm thickness aluminum alloyWelding:Argon ... of stainless steel screwTank capacity100L,150l,200L,300L,500L,800L,1000LSolar collector10/12/15/18/20/24/ ...