... 100% in house Annual capacity 1000,000sets solar water heater Manufacture since 1987SRCC,Solarkeymark approvaltesting 100% in houseAnnual ... capacity 1000,000setssolar hot waterSolar water heater,solar hot water,solar water heating,solar heatingModel: ... the closed loop, operating under the pressure.6) Intelligent control and automatic operation.7) Special anti-freezing function,work ...