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KNX ADVANCED COURSE

It is possible to combine these heating types. The two-level heating (basic and additional
heating) is an example of this. The basic level can be underfloor heating (slow) and the
additional level can be hot water convector heating (quick). The reaction time during the
warm-up stage is visibly shortened.

1.3.2 Heating Curve
When planning the heating system, the average minimum external temperature is used as
a starting point. This temperature has been defined for all the locations in tables (e.g.
Climate data for Germany) and is –14°C for Berlin for example. This means that the
maximum flow temperature of the heating system is defined for Berlin at an external
temperature of –14°C.

Table 4

Town Temperature Wind force

Berlin - 14°C light
Chemnitz - 16°C light
Dresden - 14°C light
Dortmund - 12°C light
Erfurt - 14°C light
Frankfurt/Main - 12°C light
Hamburg - 12°C strong
Limbach-Oberfrohna - 16°C light
Lüdenscheid - 12°C strong
Munich - 16°C light
Figure 11: Climate data of selected locations
The characteristics field of the heating curve is produced from the temperature value and
the selected heating system (high, low or minimum temperature).
Designation of the heating system:
High temperature system: e.g. gravity heating (no longer for new systems according to the
regulations)
Low temperature system: e.g. conventional heating system
Minimum temperature system: e.g. underfloor heating

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