Project Homeownership - Basement, Ground Floor Plan - Tips

Then just take a self-sufficient electric heater or infrared for the hobby room. I'm not an expert, but for heating a room now and then, that's fine.

To operate radiators, you usually need a significantly higher flow temperature than for surface heating systems. However, heat pumps are not suitable for such high flow temperatures and therefore have to use the built-in electric heating element for assistance. So you end up creating a pure electric heater with the corresponding operating costs.

For occasional use, an electric heater (infrared) at the workplace is probably suitable. It is inexpensive to purchase, and the high consumption is offset by the duration of use.

OK, then this topic is probably settled. Now I would like to hear your opinion on my plan. So photovoltaics, air/water heat pump, controlled residential ventilation + heat recovery. PS: we will build in LEGO style, so Neopor blocks filled with concrete. Greetings

Now I would like to hear your opinion on my plan.

I find the floor plans okay; that the bathtub is the first thing you see in the bathroom, standing in the middle of the room, reminds me a bit of a massage practice. Are there any views?

PS: we will build in LEGO style, that is Neopor blocks filled with concrete.

There are several threads about this here, my most detailed words on the subject are in this one:

Radiators require significantly higher supply temperatures. Like underfloor heating. This ruins the advantage of an AIR-TO-WATER heat pump.

For heating: If the room is within the heated envelope: yes. Then install underfloor heating and always run it at a very low level. And yes, the heating response is significantly slower than with radiators.

Is this a room with very few usage hours? Then an electric heater in addition to the underfloor heating would be an alternative.

Yes, there are opinions.
I drew the house in Sweethome 3D. Without this software, I would not have noticed some mistakes made by the architect.
My wife would like a black tub as an eyecatcher, which is why it is so central.
Due to the room height (about 4m), it could really become very pretty.

I read the thread you linked.

I see a few other aspects there, but I find your opinion very helpful.
I like the idea of good insulation and the very massive construction with concrete. After all, there is more and more radiation and external influences. Concrete is a very dense building material, which shields radiation, noise, etc. well.
For us, it is added that acquaintances are very satisfied in such a house from the 70s (at least I think so). They only have the problem of ventilation, resulting in occasional mold if not enough is ventilated.
For this reason, a controlled residential ventilation system must also be installed. Although I think a controlled residential ventilation system should be mandatory nowadays.
Homebuilders are required to build increasingly airtight. But the ventilation is left to the residents.

Although quite old, I find it very interesting

Regards

PS: I would gladly exchange ideas with other LEGO home builders. If there are any, please get in touch.