The high-rise hot water temperature in the hotel is high, while the low-rise hot water temperature is lower than the high-rise hot water temperature.

Yes, the hot water radiator does not need special pressure to supply water from high to low, which is equivalent to natural circulation. From low to high, there will be resistance, and it is easy to reach the high temperature.

Solar water heater is a photothermal converter, which is different from traditional natural utilization, such as drying and lighting.

Vacuum tube is the core of solar water heater. Its structure is like an elongated thermos container, and there is a vacuum between the inner and outer layers. The surface of the inner glass tube is coated with a spectrum selective absorption coating through a special process to absorb solar radiation energy to the maximum extent. After sunlight, photons hit the coating, and solar energy is converted into heat energy. Water absorbs heat from the outside of the coating, and the water temperature increases and the density decreases. Hot water moves upward, but the specific gravity of cold water decreases. Hot water is always located in the upper part, that is, in the water tank. The hot water temperature rise of solar water heater has little to do with the outside temperature, but mainly depends on the illumination. When you turn on any faucet in the kitchen or bathroom, the hot water in the water heater will naturally drip out. The greater the drop, the higher the water pressure.