Page 30 - Advanced Course

KNX ADVANCED COURSE

1.1.1 Requirements to the climatic control system

Already in the nineties minimum requirements were laid down for central heating in
national regulations for the control of the heat supply and electric valves, e.g.

Temperature controlled (outside temperature or other applicable reference variables)
Time controlled
In the mean while, requirements have again been extended. Compared to standards – of
which many exist in the area of the energetic evaluation of buildings – regulations are
requirements that are fixed by the lawmaker and thus are binding. In some European
countries the energy saving targets were considerably lowered in the last years (e.g. up to
30%).
These regulations are in the end all based on international standards, which were in turn
the result of political activities, e.g.:

- EN 15232
- EN ISO 13789:1999-10
- EN 832:2003-06
- ….

Although the earlier regulations were required by law, the energy saving targets were
relatively easy to fulfil. Since not only in Europe politics has increased its focus on CO 2
reduction, this has an immediate impact on regulations.

The regulations clearly lay down that the energetic targets for larger buildings need to be
higher than those of smaller.

Fact: in case of new buildings or even in the case of extensive renovation, the targets can
only be achieved thanks to building automation, especially when one wants to achieve a
certain differentiation in the heat/cool distribution (e.g. per room) in these buildings.

1.1.2 Energy Certificate

A result of the before-said regulations is in the end the energy certificate of a building, of
which the German version is shown underneath. The way such a certificate is established
can however be highly complex, hence not explained below.

Home and Building Management Systems KNX Association
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