... Manufacture, sales, assembly and services for solar water heater, Air-source water heater;Famous Brand in China,ISO14000,ISO9001 Hongxi ... waterTank is the most important part which stores hot water. It adopts imported PVDF panel, which resists corrosion ... it makes the heat collector vertical to the rays of sunlight, so that maximum efficiency of solar water heater is achieved. solar water heater hx24