For smart home we mean the one in which the lights go off by themselves if a room is empty, the heating system adjusts itself according to the outside temperature and the shutters rise and fall depending on whether the sun beats or not. And something else.
A smart home in short, it is the one where a home automation system regulates the operation of all or some systems with the aim of simplifying the life and increasing the comfort of the occupants.
However, one doubt haunts us: do all these automation and control systems save energy? The major investment required for the purchase of a smart home, or to equip an existing building with intelligent systems, is it also justified by saving on bills?
The answer is in a standard, CEN EN15232 "Energy performance of buildings - Impact of automation, regulation and technical management of buildings" dating back to the launch of the 2002/91 / EC directive on the energy performance of buildings. Standard implemented in Italy with the CEI 205-18 Technical Guide dated February 2011.
What does CEN EN 15232 say and why does it have anything to do with smart home? It is important because the text emphasizes as an indispensable ('indispensable') factor that all electrical and technological systems, both new and existing ones, are equipped with control, automation and regulation devices or systems.
This is because the inclusion in buildings (we are talking about those of the residential and tertiary sectors) of control and automation systems determines - according to the law - a reduction in energy consumption in general and above all those related to: heating, cooling, ventilation , lighting and hot water production.
Not only. CEI EN 15232 goes further and endorses the principle that the large-scale use of automation systems can educate to good energy saving behavior and respect for the environment, correcting the user's bad habits thanks to the intervention of technology. . How to say: the smart home it also makes its occupants 'intelligent'.
Obviously, the standard contains methodology and criteria for evaluating the influence of automation and building management on energy consumption. A methodology which is based on the division of the plants into the four classes indicated below.
- Class D 'Non energy efficient': traditional technical systems without automation, not efficient from an energy point of view;
- Class C 'Standard': systems equipped with BACS (Building Automation Control & System) automation systems and considered the reference class;
- Class B 'Advanced': automation systems (BACS) also equipped with management systems for centralized TBM control (Technical Building Management);
- Class A 'High Energy performance': BACS and TBM automation and control systems with high energy efficiency.