One: Yes.
Two: Use solar water heaters, gas water heaters and circulation pumps in series. The outlet pipe of the solar water heater is connected to the water inlet of the gas water heater through the circulation pump, and the outlet pipe of the gas water heater is connected to the water pipe network domestic hot water. The end of the domestic hot water pipe network is connected to the return pipe of the solar water heater. When there is enough sunshine and the water temperature of the solar water heater is high, turn off the power supply and air source of the gas water heater (do not close the water tap ). The domestic hot water system uses hot water supplied by the water heater. solar water heater and does not consume energy. When there is little or no sunshine and the water temperature of the solar water heater is low, the gas water heater is turned on for heating. Firepower can be adjustedbased on the inlet water temperature of the gas water heater, which is more energy efficient. -economy.