... ,CCC, Keymark & CE approval Separated Pressurized Solar Water Heater, split solar water heater, solar water heater, ISO,CCC, Keymark & CE approval1, ... 3)Heat-conducting liquid transfers heat to water by heat exchanger in the water tank 4)Case the temperature D-value ... with the building perfectlyIntelligent control and automatic operationAntifreeze: no water inside the tubes when it works, it can be ...