Is HAR/technology sufficiently dimensioned? Any experiences?

I have just been through the drama myself. As a layperson, it’s easy to forget how much space is needed for pipes and working on them. Just try, for example, to mentally go through how your water and ventilation pipes are supposed to be routed out of this room into the house and what that means for the usability of the walls along their path. And as has already written, the air-water heat pump in the corner won’t work; at least allow 30cm of wall distance so it can be connected. Even if that is enough, you will still have the problem later that no one can access it if you block the system with additional devices.

Apart from that, the placement of ventilation and heating is also tied to an enormous (long-term) savings potential. That should also be considered whenever possible.

I would estimate that your room barely suffices for connections, heating, and control cabinets. All the rest must find space elsewhere.

Hm, a controlled residential ventilation system would no longer fit above our storage tank. But I find such discussions or drawings not very informative, since rarely a heater is mounted on the wall, many pipes need to be accessible, controlled residential ventilation pipes have their own dimensions, and meters from providers like the waterworks must be removable. They have their own regulations.

There are also no tall rectangular containers for water storage. But as already mentioned, space for pipes, etc. must be planned. I therefore understand that such discussions cannot serve as a reference, but it helps me to better assess the whole thing. Currently, I can only read the dimensions from the technical data. Such information as that the air-to-water heat pump must stand at least 30 cm away from the wall then helps.

Where does the fiber optic APL go? Where should the small server cabinet for patch panel, switch, router, and possibly NAS go? Does the TV cabling run through the utility room?

Currently, I would like to place the connections including the fiber optic on the upper wall. Air-to-water heat pump, controlled residential ventilation, and hot water on the left wall. Probably one control cabinet is also enough, then the lower one would be unnecessary and the battery could be placed here.

I just went through this drama myself. As a layperson, one easily forgets how much space is needed for pipes and working on them. For example, mentally think about how your water and ventilation pipes are supposed to be routed out of this room into the house and what that means for the usability of the walls along the way. And as already wrote, the air-to-water heat pump in the corner will not work; at least 30 cm clearance from the wall should be calculated so it can be connected. Even if that is enough, you will still have the problem later that no one can access there if you fit the system with further devices.

Apart from that, there is also a huge (long-term) saving potential tied to the placement of ventilation and heating. That should be considered if possible as well.

I would estimate that your room just barely suffices for connections, heating, and control cabinets. All the rest has to find space elsewhere.

Thanks for the info. Do you think it is enough to mount the connections on the top and the air-to-water heat pump, controlled residential ventilation, and hot water on the left wall? If that fits, I should be able to manage the rest as well.

I'll put it this way: Our boiler room is 1.6m wide and 2.65m long, the door is on the right side of the narrow wall. Opposite the door, in the bottom right corner, are the connections for electricity and water, and on the left runs the wastewater pipe. On the right long wall are the main electrical connection box and the water meter. On the left wall are the gas boiler, the 200l hot water tank, and of course the piping with MAGs, refill station, sludge separator, etc. You can just about reach everything comfortably, but otherwise the room is simply full.

I also initially thought I could fit the controlled residential ventilation in there - no chance.

What is often underestimated about controlled residential ventilation is the pipes. Either you place the distributor somewhere else in the house and have to handle 4 pipes of 160-200 mm diameter (possibly even thicker with insulation) in the utility room, or you have the distributor there and need to accommodate at least a dozen flexible pipes.

Edit: Maybe you can fit the distributor boxes under the stairs?!

So I'll put it this way. We planned and built a mini HAR so that we would have more space in the kitchen.

In 1.60m x 2.60m are: house connections, gas boiler, 300L storage tank, controlled residential ventilation, solar thermal station, Hager ZB34S, HKV for 8 circuits, washing machine + dryer, and I'm considering installing a 9HE cabinet at some point because the LAN cabling keeps getting bigger.

So you can fit quite a lot in, but the utility providers have to cooperate. However, I wouldn't recommend it, of course.

Could you please take a photo of that? That is already art!

Please, fine. The gas boiler is at the back left on the wall behind the storage tank. The pipe running diagonally upwards is the chimney. But as I said, not recommended.