[23] A necessary but not sufficient condition for making a building smart

Without a building automation and control system (BACS), a smart meter is rather limited in the energy conservation it enables.

BACS promote energy efficiency, while ensuring that rooms have heating and lighting when occupied. It allows outside temperature to be monitored, and adjusts internal comfort accordingly.

BACS also allows buildings to be responsive to the needs of the electricity system, e.g heating up buffers when energy demand is low, and postponing heating demand when the grid is strained.