What is the size of the house connection room for gas-solar thermal systems with a buffer storage tank?

Just take a look at your basic supplier's website, there is often information about the minimum size requirements.

Technology is a necessary evil – for the saved sqm you get even more space in the sacred wing (as you so nicely say )

Anyone who thinks like that, with all due respect, is nonsense. Technology must be kept accessible; the installers must still be able to work on it later. In a house built without a basement, it is also necessary to have storage space. What use is it if I reduce the utility room to the bare minimum, there is constantly a lack of storage areas, and I am forever tied to the same technology? Then, in my view, it makes more sense to plan an adequately sized utility room, preferably divided within the areas of connections and maintenance.

The only ones who value more space are either those who prefer to make appointments with the washing machine or those for whom functionality through common workflows is important.

The latter, dear Yvonne. – You have a separate utility room with a good 12 sqm available. But – if nothing has changed in your layout, the heat generator has already moved into this room because there is no space for it in the utility room. In that respect, your utility room could also have been omitted. Rhenish greetings

Anyone who thinks like that – with all due respect – is talking rubbish.

Technology must be kept accessible; the installers must still be able to work on it later. In a house construction without a basement, it also adds that "storage space" is needed. What good is it if I reduce the utility room to the bare minimum, constantly have a shortage of storage surfaces, and am forever tied to the same technology? From my point of view, it is more sensible to plan a correspondingly large utility room, preferably divided within the areas of connections and management.

The latter, dear Yvonne

– You have a separate utility room of a good 12 sqm available. But – if your layout has not changed, the heat generator has already moved into this room because there is no space for it in the utility room. In this respect, your utility room could also have been omitted.

Best regards from the Rhineland

Of course, that’s rubbish! Did you miss my irony mode or had I hidden it?

I remember some threads where the utility room/freezer room was tiny. Especially one thread: the freezer/utility room was somehow only 3.5 sqm. For pages, the original poster showed little insight; only the washing machine was drawn into the room, the dryer could just be stacked on top. Heating? Electrician? Nope. The poster intended to dry laundry in the oversized show living room.

Personally, I am at an age where I consider it a luxury to be able to fill beautiful built-in cupboards with provisions and cleaning supplies and still keep an overview – if I have to struggle with housework, then please comfortably and functionally. I also don’t want to store my fermenting rum pot on one sqm with lint from the dryer.

Especially when there is no basement, the utility room should not be planned too small. We have a 12 sqm utility room and an additional 8 sqm storage room. In the storage room, there is a freezer, a second (backup) refrigerator, and a heavy-duty shelf. In winter, as long as there is no garden shed yet, the patio furniture is stored there (all foldable). Once the garden shed is there, a second shelf will be added.

In the utility room, besides the usual suspects (heating, electrical panel, etc.), there is a washing machine, dryer, two old base kitchen cabinets, and two old wall kitchen cabinets - tools, etc. also need to be stored somewhere. There is still space for one or two drying racks in case of emergency. Material is still repeatedly stored in the utility room. Until recently, it was materials for our irrigation system as well as for parts of the outdoor area. Currently, there is a mailbox that still needs to be assembled and posts for a planned composter. Especially in the beginning phase, you always have a lot of stuff that still needs to be installed somehow.

btw. it actually pains me deeply that my stainless steel gas grill (previously, grilling with gas was only allowed on the balcony) and my bike have to spend the last and probably the next winter outdoors. But I can only put them away once the garden shed is in place.

Again - we have a 12 sqm utility room and an 8 sqm storage room but no basement.

You have a separate utility room with a good 12 sqm available. But - if your layout hasn’t changed, the heat generator has already been moved into this room because there is no space for it in the utility room. In this respect, your utility room could also have been omitted

Do you mean the hot water tank or the heat pump by residential unit? No, it has actually been moved into the house connection room, and there is nothing related to building services in my utility room. The architect just wasn’t sure if it would fit and therefore planned it in the utility room just to be safe. But the plumbing and heating specialist said “no problem, we can fit it all in there.”

I’ve inserted a picture. In the meantime, it’s of course tiled, tidied up, and under the fuse box we even have a small cabinet standing. The fuse box is at the far left edge of the picture next to the network box.

my bike had to spend the last and probably also the next winter outdoors

That's why we have had a garage from the start ... :-(. If the bike is used regularly, it should not suffer any damage. The stainless steel grill should also get through the winter unscathed. Hopefully, you will not use de-icing salt. (Of course, the bike needs to be maintained.)