The stability of the heat network in the heating system mainly depends on the boiler, heating network circulation system and pipeline. The main function of the heating network circulation system is to ensure stable water circulation and constant pressure, that is to control the water level to achieve safe operation. Heating load changes need to adjust the amount of water, if through the outlet of the yellowing pump opening to achieve, in fact, rely on pressure loss to reduce the water flow, while the motor output has not changed, resulting in a lot of energy waste. Therefore, the best solution for the heat pump circulation pump is to use the inverter for speed control, so that you can open all the exit doors, and control the flow rate by adjusting the speed. You can easily adjust the unit heat supply, which has a great potential for energy saving.