Working principle of high pressure solar heater: utilizes the alternative absorption coating on the inner surface of the vacuum tube, from the high-temperature environment super-conduction tubes lead the heat to the water tank, and produces hot water2) Easy to use, also convenient to install3) Can be put in the courtyard, on the roof or balcony4) Inlet water hole connects to the tap water, and the outlet hole connects to the tap water, and the outlet hole produces pressure hot water directly5) Working principle of low pressure solar heater: adopts the alternative