solar water heater 1)CE,3C,ISO9001,CNAL; 2)non-pollution; ... and 15 years for vacuum tube.Non-pressurized solar energy1.solar water heater with CE,3C,ISO9001,CNAL ... , assistant tankLogo: OEM, co lour printing /stickerFeature: 1.Solar water heater with CE,CCC,ISO ,CNAL certificate2.Special high ... heat transferring and long life span of the solar water heater4.Exquisite workmanship to guarantee the decent ...