Todays district heating and gas substations for domestic heating uses a since long time established heat metering and control technology. The measurement and control system architecture is based on a paradigm of non communicating sensors and regulators. The now evolving paradigm of sensors and actuators connected in sensor networks open for new measurements and control concepts to be used in energgy measurement and control. The sensor network approach enables the use of sensor fusion theory. Thus enabling improved measurement accuracy, improved control possibilites and estimation of interesting more parameters like tap water energy consumption etc. Further it leads to a capability of customer communication using live energy data. Using the Embedded Internet System (EIS) architecture every sensor, actuator and control box in a substation will be individually connected to the Internet. This opens for flow of data from the heat meter to the control system opening new possibilites for control and data estimation. It also opens for data from the control system to support improved heat measurement. Similar solutions can be found in the gas application. In district heating we expect improvements like, improved heat metering accuracy, maximized differanse temperature, minimized forward flow temperature, hot water energy measurement each of them having economical impact.