Calculate heating load to determine the size of the ground source heat pump

Yes, we have quite a lead, but don't be mistaken about the basement - why should anything be heated there? Through the ventilation system? Then you could save quite a bit of heating surface

What are you curious about? If the heating system is there, then it's there - or do you mean the switching cycle?

That's already quite a few square meters being heated more. How many meters of underfloor heating do you have?

The basement is also heated, meaning the unheated rooms, because it is completely within the insulated building envelope, i.e., with a temperature difference of a few degrees compared to the rest of the house, the heat flow from the house to the unheated basement is just as large as from the basement to the outside, so our basement does not get colder than 16 degrees. If I now turn on the heating in the basement, then I only need to use ~>additional<~ energy to heat it from 16 to 20 degrees. Because I have to spend the energy for the indirect heating anyway. Only that the heat then goes directly into the basement rooms, not through detours first. By the way, this is not just theory but practice (measurement of consumption when I heat or not!). So I don't think I am mistaken. I am curious about the consumption etc. in comparison. Here in my neighborhood/acquaintances etc. there are few with brine heat pumps. You heat more square meters with a fully heated basement, but these are only 4 degrees (during the coldest months) higher than mine. With almost KfW 55 and 8 kW heating load, it seems high to me, because I am actually below 5, if we both now included 1 kW for hot water, that would be 7/4, so 75% higher load, but by far not 75% more area. Or do you have a side fully glazed or something??? (would increase the heating load)

Oh, I see, yes, but it will take a while until I have reliable numbers. Currently, I am heating with 48kW

You can even count the euros on the electricity meter

Remember to ventilate a lot, at that level of combustion a lot of water is produced, if the devices are inside, of course only.

No, the exhaust pipe is stuck in the chimney flue - has basically [entjungfert] it now.

Last night, let it run full blast for just under an hour and went from 7 degrees and 99 percent humidity to 27 degrees and something around 35 percent humidity.

But now it’s set to 15 degrees. Still drinks like a hole...