solar heater 1)EXW,FOB 2to Denmar,Romania etc. 3)customer from more than 13countries 4)near Lecong ,Guangzhou Non-pressurized Solar water heater How non-pressurized solar water heater works1. Non-pressurized solar water heater of all glass evacuated tube collector integrated with storage tank, are ideal for use in houses and other applications where cheap, reliable hot water supply is required. ...