... )Compact unpressurized 5) Easy operation 14 years manufacturer of 200/250/300 liter compact solar water heating with CE,CCC,Keymark ... for winter. 4) Temperature when exposed to sun without water: 250°C, 2.5 hours to boiling point if using single ... on the basis of OEM 14 years manufacturer of 200/250/300 liter compact solar water heating with CE,CCC,Keymark ...