Reliability of an energy calculation for KFW55, too high?

Just think about it.... Which part of the house is heated by the heating system and where does the heat encounter resistance.

Completely independent of whether it is living space or non-living space?

By the way, I can't imagine that there is no heating in the basement.

What is supposed to be 4860 kW/a?! kW is a power unit... an offshore wind turbine has 5000 kW. The calculation still seems suspicious to me... do you have a [Controlled residential ventilation with heat recovery]?

What are 4860 kW/a supposed to be?! kW is a power unit... an offshore wind turbine has 5000 kW. The calculation still seems odd to me... do you have a controlled residential ventilation system with heat recovery?

Yes, we have a controlled residential ventilation system with heat recovery, the exact designations of the capacities are in the previous attachment.

I simply want to know approximately what electricity consumption I have to expect per year with this equipment.

Regarding the question about the calculation of usable areas, I have now received an answer: for the KFW calculation, the entire building is calculated including the basement or attic, whether heated or not is totally irrelevant! It is also calculated with a ceiling height of 3m due to this factor!

another flat question: has kfw55 now been confirmed or not? if yes, then everything is fine. how much energy you really waste in the end depends entirely on you.

According to the invoice, you will consume 4866 kWh of electricity - so 90 € per month, including WW. For 250 sqm, this is not unreasonable with an air-water heat pump - although the annual performance factor would be very low... For example, we have 7663 kWh primary energy for 190 sqm but then correspondingly less final energy due to the brine-water heat pump. What you will really consume is a completely different matter.

Hello everyone,

regarding

[*]The expert surveyor arrives at 277 sqm of usable area, which seems very high to me! He then calculates based on that for electricity consumption and ends up with a final energy demand of 4860 kW/a

Then take a look at the usable area calculation, sometimes garages etc. are also included, so that adds a few sqm more than expected.