Air-to-water heat pump sizing in new construction

I am missing room labels, heat demand per room, surplus/undersupply, design temperatures, heating circuit lengths, temperature spread, ..

Attached is a new overview for one of the rooms. The heating circuit length would be 106 m, unfortunately installed with a spacing of 15 cm. I still cannot determine any surplus/undersupply from it, or are other terms being used!?

that is for the ventilation...............

das is for the ventilation...............

How do you come to that? This is the heat load calculation for a room that is probably next to the bathroom. However, this calculation is only a small part of the overall heat load calculation of the house.

Well then, your Heizi should set everything according to these values.

I still cannot deduce an over-/undercoverage from this or are other terms used!?

You have posted a heating load calculation. Simplified, it means that a certain amount of heat is required. Depending on the design of the heating system, you can achieve this with a 15cm laying distance and 45 degrees flow temperature or with a 5cm laying distance and 28 degrees flow temperature. Or it doesn’t fit and there are overcoverages or undercoverages.

As a summary, it should look like this or similar:

You have posted a heating load calculation. Simplified, this means that a certain amount of heat is required. Depending on the design of the heating system, you can achieve this with a 15cm installation spacing and 45 degrees supply temperature or with a 5cm installation spacing and 28 degrees supply temperature. Or it doesn’t fit and there are overcoverage or undercoverage issues. As a summary, it should look like this or something similar:

Thank you! The "functional principle" and the relationships were understood well enough that I can also follow your overview accordingly. My problem was simply that when I asked for the heating load calculation, I was only given the calculation per room shown above, and there was no information on installation spacings, over- or undercoverage specifications. Therefore, I was confused again and thought that either I was too stupid to correctly assign all the technical abbreviations and units or there should be another overview with the corresponding information :)