Das ist jetzt als *.valentin-software.co Space Heating :: GeoT*SOL® help
How to proceed:

Space-heating loop

  1. Enter the low-temperature (LT) space heating loop proportion. Valid is: HT + LT = 100%.
    HT = high-temperature space heating loop proportion (radiators)
    LT = low-temperature space heating loop proportion (wall or underfloor heating)

  2. The supply and return temperatures are set by default. You can change the values.

    Space-heating loop T supply T return
    LT 35 °C 27 °C
    HT 45 °C 30 °C

    Note: HT space heating usually has a spread of 16K, minimum.

    Note: Systems that use heat pumps directly connected to the space heating loop can only be operated with LT heating, as those heat pumps cannot achieve any higher temperatures.

    Note for groundwater systems: If the heating requirement cannot be supplied by the heat pump, and too much proportion is supplied by the heating element, the groundwater temperature might be too low.


  1. Define how the heating energy requirement is calculated: either

    heating load (the heating output (yearly) is then calculated from this),

    as annual heating requirement (the heating load is then calculated from this), or

    as heating output (monthly).

    Enter the corresponding values.

  2. Define the heated usable area, the indoor temperature, and the heating limit temperature. In the annual simulation, the relevant heating requirement is calculated from these design data, the respective outside temperature, and the irradiation. A warning is displayed in the event of undersupply.

  3. The total resulting parameters of specific heating load (in W/m²) and specific annual heat requirement (in kWh/m²) are displayed below right.

  4. The Standard Outdoor Temperature depends on the location. For Germany, there is a climate map of the Bundesverband Wärmepumpe e.V.: https://www.waermepumpe.de/normen-technik/klimakarte/

  5. The specific heating load (in W/m²) and spec. annual heat requirement (in kWh/m²) are calculated and displayed at the bottom right. The annual simulation calculates the current heating demand of those dimensioning parameters for the particular outdoor temperature and irradiation. A warning is displayed in case of undersupply.

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