How to save energy in drainage pump and ventilation system of property company?

The drainage pump can adopt variable frequency speed regulation to save energy according to the change of water consumption. Ventilation system can also use frequency conversion speed regulation to save energy. In other words, if you don't use frequency conversion speed regulation originally, you can install frequency converter to speed regulation and save energy. If the motor power is high and the power factor is low, a reactive power compensation device can also be installed on the spot to save energy. You can also adjust the network of the ventilation system to reduce the ventilation resistance of the network, and at the same time try to reduce and prevent air leakage of the ventilation network to ensure the efficient operation of the ventilation system.