Energy meters, or heat meters, are used to measure the amount of energy consumed in the operation of a water-based heating or cooling system.

An energy meter measures the amount of water flowing through thermal or refrigeration appliances and calculates the amount of energy consumed by an individual apartment or other space. An energy meter consists of a flow sensor, temperature sensors and a calculator unit. In apartment-level energy meters in residential buildings, these components are integrated into one compact meter. Larger sizes – DN25 and up – are installed by connecting the temperature and flow sensors to the calculator unit with wiring.

A single energy meter is capable of calculating the amount of both heating and cooling energy. Consumption data collected by the meter can be transferred using various remote reading options.