Heat demand calculation according to DIN 12831

...they should be on site.

That would then be fine. Only the heating surface sizing and the hydraulics are still missing. Is a controlled residential ventilation system planned?

Best regards

Today the documents arrived:

According to the DIN 12831 calculation, we have a Qn value of 4318 watts for our house.

A Nilan compact solution is planned as the heating system. According to the manufacturer, the heat pump delivers 3 KW and the controlled residential ventilation (VP18) 2 KW. As a backup, there is also a 2KW heating element.

Underfloor heating will be installed throughout the entire house.

What surprises me is that the calculation states: Category 1b (according to the Energy Saving Ordinance without room air technology system)

Otherwise, it looks good, doesn’t it?

Best regards,

Haunt

Edit:
Manufacturer's information:

for the COMPACT P heat transfer approx. 2kW
Heating capacity without outdoor air preheating approx. 500W, with outdoor air preheating approx. 1000W, each based on -12°C

for the JVP3:
At 100% power, that is 3.9kW at S0/W35
At 80% power approx. 2.9kW at S0/W35

To be honest, I don't understand the manufacturer's answers. Do I now have to deduct the 2 kW transfer capacity of the controlled residential ventilation from the heating load calculation?

Confused regards

...What surprises me is that in the calculation it says: Category 1b (according to the Energy Saving Ordinance without room air conditioning system)

This suggests that the entire heating load calculation is probably incorrect, which by the way is not uncommon.

Regards

Today I had a long conversation with the heating manufacturer. They received the heat demand calculation from our home builder, which I find very positive.

Of course, I am only a layperson and cannot assess the whole thing, but according to the company, I can expect a total electricity demand of 6000 kWh per year.

3000 kWh for the heating system
3000 kWh for private consumption (which matches our experience)

Corresponding packages can be seen online. Thanks to the home builder, we already have the second meter in the house and can probably negotiate an even better tariff.

This probably means the entire heating load calculation is wrong, which by the way is not uncommon.

Side question: How do I even find a good building services engineer?