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Energy meters for heating and cooling

A thermal energy meter is a meter designed to measure thermal energy, which is transferred in a thermal energy exchanger to a liquid called heat transfer fluid.

A thermal energy meter is either a compact meter or a combined meter consisting of subsets, i.e. a flow sensor, a pair of temperature sensors and a calorimeter, or a combination of a compact and a combined meter.

Validation period

Energy meters Period
a) compact energy meters 4 years
b) fluid flow meter 4 years
c) temperature sensors 4 years
d) temperature sensors with built-in transducer 2 years
e) pressure and differential pressure sensors 2 years
f) evaluation units of combined heat and cool meters 4 years
Water meters Period
a) for cold water 6 years
b) for hot water 4 years
c) drum water meters 2 years
d) water meters (volume) 6 years

e) cold and hot water meters used for cost allocation to the final consumers

5 years

Accuracy classes

Accuracy classes are defined for thermal energy meters: 1, 2, 3.

For household consumption, measurements are permitted to be made by any Class 3 meter.

For commercial or light industry purposes, the use of a Class 2 meter is required.