The high-efficiency flat plate solar collector adopts high-purity copper tubes, which are corrosion-resistant and not prone to copper rust. It adopts a double circulation closed system, which is pollution-free and has good water quality. The clean hot water produced can reach the standard of Class I water. 
Recently, a post titled "Shock, the electromagnetic radiation inside the Chevrolet Cruze is very high" has sparked heated discussions on multiple automotive forums: multiple Chevrolet Cruze owners have detected excessive radiation inside the car. According to the test results, the electromagnetic radiation intensity inside the car is nearly 30 times that of a substation. 
Electromagnetic radiation poses great harm to the human body. It may be one of the causes of leukemia in children. Medical research has shown that prolonged exposure to high electromagnetic radiation can cause changes in blood, lymphatic fluid, and cell cytoplasm. It can induce cancer and accelerate the proliferation of cancer cells in the human body. It affects the human reproductive system, mainly manifested as a decrease in male sperm quality, natural miscarriage in pregnant women, and various hazards such as fetal malformations. 
In daily life, there are still many household devices that pose safety hazards to the human body. As for solar water heaters, vacuum tube solar water heaters, which have a market share of over 90% in China, have many shortcomings compared to flat panel solar water heaters. In terms of water quality, vacuum tube solar water heaters mainly use direct open systems, and the water is kept in the temperature range of 40 ℃ -60 ℃ for a long time, which can breed Escherichia coli and nitrite (which can cause cancer). The water quality is polluted and belongs to Class II water quality, which cannot be consumed and can only be used for bathing. The representative of flat panel solar energy, Tomorrow's high-efficiency flat panel solar collector, uses high-purity copper pipes, which are corrosion-resistant and not prone to copper rust. It adopts a dual cycle closed system, which is pollution-free and has good water quality. The clean hot water produced can reach the standard of Class I water.