NBN EN 12098-3:2013

This European Standard applies to electronic control equipment for heating systems with direct electrical emission, which do not have an integrated outdoor compensated function and or optimum start/stop function.
This control equipment controls and regulates the distribution and/or the generation of heat in relation to the outside temperature and time and other reference variables.
This European Standard also covers controllers which contain an integrated optimum start or an optimum start-stop control function. The controller modulates heating or control modes of electronic individual zone or emitter control equipment.
Safety requirements on heating systems remain unaffected by this standard. The dynamic behaviour of the local thermostats, sensors, or actuators is not covered in this standard.
A multi-distribution and/or multi-generation system needs a coordinated solution to prevent undesired interaction and is not part of this standard.