2. Regulations and standards

2.1 Preamble

The quality requirements to be met by all hot water distribution systems, whether individual or collective, can be broken down as follows:

• Temperature setting must be possible, precise and accurate;

• the temperature, once set, must be stable;

• the waiting time for the flow of cooled water before the arrival of hot water should be as short as possible (a few seconds);

• the hot water supply must be continuous, i.e. reliable, unless the cold water supply to the cylinder is accidentally interrupted or consumption is excessive.

To meet these requirements, it is worth recalling the regulations and...