Page 33 - Advanced Course

KNX ADVANCED COURSE

1.2 Planning the Heating System

The planning of the heating system is generally carried out by specialist heating engineers
under certain criteria.
Type of heating – selected by the customer (according to the type of primary energy)
Heating curve – dependent on the type of heating and location
Capacity of the heating elements – building type (W/m²), room temperature costs
Heating control - costs
An important selection criterion is the price of the primary energy which is available at the
installation site. It is less the current price that is considered and more the price
development of the last few years and the prognosis for the next few years. The
investment costs and operational costs for the system must however also be noted when
selecting the type of primary energy (e.g. a storage room, oil tanks, oil pumps and
corresponding control technology for fuel oil). The diagram below shows a comparison
between the different energy types.

Source: Federal Statistic Office Germany
Measured Measured
values values

Gas

Electricity

Heating oil and
fuel

Figure 4: Price development of fossil fuels compared to electricity with 2005 as reference

As further example from Germany, an absolute price comparison between gas (yellow),
electricity (blue) and oil (red) – source (http://www.energieagentur.nrw.de).

Home and Building Management Systems KNX Association
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