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easy installation,no mentanance,anti-freezing,anti-ice ball shocking CGC,Solar keymark,kang-ju,ISO9001,CE.Special Swimming pool The advantage of high efficiency solar water heater: -Holistic collector pannel,Thermal efficiency over 80%, only one in China. -Manufacture Technology From Germany -Integer building joint,inlay and waterproof installation -Excellent function-provide central heating and hot water system. -Freezingproof design- work at -35 frost environment,anti-snowing and ice ball shock. -Automatic input water-use conveniently -laser welding between absorber and riser tube -Long life design,over 25 years -Work pressure 0.75Mp,Test pressure 1.2Mpa, -Midium circulation,use antifreez -Assistant heating,constant temperature control -High temperature design,45~90 can be adjusted The advantage of high efficiency solar collector: * Magnetic blue sputtering coating has higher absorption rate to ensure the high efficiency even winter or overcast days.