Which heating? Please provide recommendations

People, people...

The numbers are not guessed, they come from Malmö, where it is known to be sometimes a bit colder than in Cologne Nippes. Or Stockholm (OK, now we are talking about a fabulous 12 kW/h difference) That is the advantage when the horizon doesn’t end at the garden gate;)

And as for the owners of the many 315s: that this box does not work in the German stone box was foreseeable. You just have to look at the origin of the device, what it was intended for, and then compare the houses. And then you realize that here in Germany we are a few decades behind. We built better 20 years ago than the current energy saving ordinance minimum standard.

Unfortunately, that is a fact. And you don’t have to be a physicist to calculate something like that.

Then come forward with facts instead of assumptions. I see none in your post, only incoherent claims. I also see no calculation (numbers just appear out of nowhere). Nothing you write/calculate is understandable; in many places it's not even clear what you mean.

Back to the topic:

We had a gas condensing boiler in the old house and now also in the new one. The first was eight years old at the time of sale two years ago and without [ST]. Worlds apart between the old and the new one! Both [Buderus]. This time with [ST], dictated by the Energy Saving Ordinance, but it’s not as bad as often written. We are very satisfied. Have been living in the house for seven months now. Calculated consumption was just under 10,600 kWh/a on 154 sqm with a 2014 Energy Saving Ordinance envelope (not Kfw 70!), double glazing. Four people, two of whom are young adults who shower and bathe constantly, requiring at least 21 degrees in their rooms because constant use of PC and PS4 cools the body down. ;) Despite the heating-up phase and screed drying, we will by far not reach this value after one year of use. Heating is and remains a gut feeling combined with personal preferences. Our favorite then and now: a micro power plant. :) Maybe our next heating system. ;)

Moin Moin

I never understood the exhaust air heat pump either.
So I make the building airtight and windproof and then cut holes in the exterior walls
to use the interior of the building as a heat source to heat it.
Congratulations to the one who invented this contraption.

Olli

Again: focus on why this device was developed (namely at a time when people here in Germany didn’t even know what a residential ventilation system was!), where this device was developed, under what conditions these devices were used, and then you can join the discussion. And just saying forever that it doesn’t work, but I’ve read that, doesn’t help anyone either. And the numbers Saruss: look them up online, but you have to take the language course yourself, I can’t help you with that as well.

Again: deal with why this device was developed (namely at a time when here in Germany people didn’t even know what residential ventilation was!), where this device was developed, under what conditions these devices were used, and then you can join the discussion. And just saying forever that it doesn’t work, but I read somewhere that it does, doesn’t help anyone. And the numbers Saruss: look it up online, but you’ll have to take the language course yourself, I can’t help you with that too.

I simply doubt all your statements. Even in my parents’ house, they already knew what residential ventilation was (that was important because the living space was in the basement/on a slope), and at that time this type of heat pump had not yet been developed. We have been looking all the time at under what conditions these devices are used and can be used, if you would just read everything, and unfortunately keep finding that people want to use them in buildings where these conditions are not met – and we advise against it! It’s not just about whether it works, but also how efficient it is! Electric direct underfloor heating works too, my sister currently lives in an apartment equipped with it, but I need SIGNIFICANTLY less energy to heat my whole house....

You would have to leave your lack of objectivity behind to be able to participate in the discussion. Apart from that, I have looked it up online, and the regulations in the other countries you mentioned are not that overwhelmingly strict. So far you have not helped at all with your posts; it would be helpful if you presented all essential facts and information clearly and objectively to be useful to the questioning user in their search, rather than throwing in some unrelated fragments, and if they are supposed to understand something, they even have to take a language course.