The heat cost allocator is placed for the correct statement of the consumed heat energy in apartments or studio’s. This solution is adapted in the places where thermal energy meters can’t be installed in the pipes. The heat cost allocator correctly measures the heat. External heat sources such as the sun or outdoor heat does not effect the measurement results. The CA-EERM does not measure the temperature in the room, only the heat from the radiator. This module automatically generates the correct consumption reports.