... warranty 3,Delievery 7-10days 4,High Quanlity&Reasonable Price non-pressurized compact solar water heaterCertification:Have passed SRCC,CE,ISO9001:2000,CCC ... , 20, 24, 30 tubes7) Easy installation and be installed on the roof or at ground levelModelLigthing(m2)Vacuum TubeSupply hotwater(L ... -1800/58-243.402420032/76SP470-1800/58-304.323025026/63 non-pressurized solar water heater..