In apartment blocks the adoption of central heating is more and more common to the purpose of reducing consumption and of efficiently managing the mechanical room. However, for this solution to be sustainable and comfortable, it is necessary that the residents have the possibility to independently manage their own user preferences and that the overall consumption costs are reliably and clearly allocated on the basis of the actual individual consumption: the answers to such demands are often referred to as "thermoregulation" and "heat consumption accounting".
Thermoregulation is performed through the voluntary control of the space heat supply, and it strongly depends upon the user preferences. On the other side, the proper system for accounting heat consumption should be chosen on the basis of the central plant layout: in case the layout is horizontal, the most appropriate solution is to install modules equipped with heat metering devices; in case the layout is vertical, a system also known as "rising main" plant, the heat consumption accounting is possible thanks to an indirect system based on the application of heat cost allocators on each heating body. Such devices have the main scope to subdivide the overall consumption cost based on the "allocation units" measured for each user.