Your current heating consumption

I also look at the values enviously. No idea how Saruss manages to achieve these values. Either no warm showerers or the ancestors come from Greenland or he cheats, e.g. with a fireplace.

No fireplace, room temperature 22 degrees everywhere. 4 people, especially wife and children are warm showerers/bathers. My drilling apparently works well, because I still have very high brine temperature (input) after the winter. Otherwise, KfW70 is not equal to KfW70. For example, we have double-shell masonry, i.e. facing bricks, then insulation (advantage: very little air movement on the insulating wall), ventilation system with heat and moisture recovery. airtightness of the building at Passive House level. With the technology, it could almost be KfW55, but in some respects we decided late and did not change the applications anymore. Otherwise, the KfW status is also calculated on the standard house; if, for example, you have more window area, it is the same KfW status but significantly different energy demand. Otherwise, everything is optimized: heating curve, no night setback, no ERR..

That puts it into perspective somewhat, of course.

Otherwise, everything is optimized, heating curve, no night setback, no ERR..

I have done all that as well, but I am nowhere near that range. However, we do not have deep drilling either, but surface collectors.

That relativizes it a bit, of course.



I did all of that too, but I don’t even come close to that range. However, we don’t have deep drilling, but surface collectors.

They are of course also somewhat dependent on the weather; if the soil is too dry before/during frost phases, they already yield less. Our drilling is also generous in length when measured by extraction performance. I simply added 30% to the planning because the pure drilling meter price directly at the company is not that high compared to the fixed costs (unless the drilling would take an extra day).