The clients bill their customers on a rolling basis. Accordingly, the meter readings must be available on the respective billing date. The rolling reading is district-oriented. At the end of the year, various meter readings are to be collected across districts for the cut-off date as of 31.12. Conventional meters (Ferraris or electronic) as well as modern measuring equipment with all handed over counters can be read.

The meter readings are to be collected by means of a viewing table or customer self-reading. In addition to the annual readings within the rolling, meter readings must also be recorded during supplier changes and relocations. These are mainly determined by self-readings.

The entire blocking and unblocking from the default of payment by customers of the suppliers must also be covered. For approx. 8,800 district heating customers, monthly meter readings are to be recorded via radio reading from January to November. Work orders for customer identification, special readings, e.g. in the event of insolvencies and

the delivery of customer letters.

In addition to the annual readings within the rolling, meter readings must also be recorded during supplier changes and relocations. The call-offs are made monthly by the client to the service provider as required.