The energy metering system achieves unified detection of heating and cooling for a whole building. And the system is widely used in the billing process of central air-conditioning or heating in apartments, office buildings, hospitals and other mega structures.

The system provides three settlement methods, which are fixed unit price billing, float unit price billing and timeshare billing, to meet different requirements of users.

• Fixed unit price billing:
  settlement will be made according to fixed unit price.
• Float unit price billing:
  the unit price is calculated according to the power consumption of all equipment in each settlement period.
• Timeshare billing:
  the unit price of air-conditioning changes according to different periods, such as different seasons.