It is also not completely transparent since it describes (ANNEX C) the reference heating/cooling demand and the number of hours in each operational mode (active mode, thermostat off mode, standby and crankcase heater mode) is decided from weighted climate, type of building, internal gains, set back setting and so on, but there is no reference that describes the calculations. Therefore it is not possible to recalculate the hours to fit specific needs. The climate hours that describes the temperature bins does not seem to be adjusted in any ways since it is the same hours that is used in Ecodesign LOT 1. Another weakness is that the model does not include domestic hot water.
Possibility The model could be developed so that it would be possible to decide the energy demand of the house. It could also be a possibility to fit the model to your own climate. Maybe the ground water temperature and thereby the bore hole temperature could be climate depending. It should be obvious how interpolations or extrapolations of capacity and/or COP should be performed to avoid differences between users
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