I always find this type of houses very impressive, even though I myself wouldn’t want to live in such a rather cool house. Why cool? Too many corners and edges. According to my Feng Shui feeling, that just doesn’t work at all.
But okay, everyone should build the way they like.
However, I find the design of the house pretty cool.
Cool... cool...
From my experience, most builders intensely ask themselves the question "Where do I want to live?". The far more important question is, however: "How do I want to live?". A house is a shell for the lives of the people who live in it. Habits, longings, attitudes, tasks, social connections and integration, aesthetic perception, bodily awareness and health – these aspects should determine the architecture. Building styles are suitable to support these aspects. Don’t squeeze your life into a design idea. Design creatively for your life.
I think you have given a lot of thought to the "How do I want to live?"... "How can I implement what I want for myself and my family?"
But I think you started somewhere in the middle without a clear thread, found alternative possibilities on the internet without researching whether the techniques or design elements harmonize with each other, etc.
I am truly no expert regarding technology, but combining many systems is more complicated than a system that works with another system.
This also applies to the function or its implementation and the question "What do I want to achieve with it?"
Let’s just take these two quotes from you:
The plan is to heat the rooms that you only use occasionally only a little. For example, the multipurpose/hobby room. Bathroom only in the morning or evening. Only when someone is home, etc. And thereby save energy.
Calculating with 160m² heated area, that is 4800kW heating capacity per year.
Cost of purchase and installation of infrared: 8000€
Cost of purchase and installation of air-water heat pump: 12,500€
Operating costs air-water heat pump per year 150-200€ (experience from a comparable single-family house in the family)
Regarding the operating costs of the infrared panels:
The keyword here is "electricity costs"
So about electricity - Tiwag:
Cost per kWh 7.376 cents/kWh
However, there are also the charges from Tinetz, so that the final price per kWh is about 14 cents/kWh.
That makes running costs of the infrared heating about 670€
How old is the rule to waste as little energy as possible? What does every builder want nowadays and what has the government regulated? Exactly: energy consumption. So why make it so complicated for yourself and use for example an old rule that can no longer be implemented with today’s technology? Temporarily reheating a cooled-down room constantly uses more energy than heating a temperature constantly.
A very important element (though I don’t know if a mechanical engineer understands this) is the solar energy trapped through the windows in the rooms. You do have nice big windows, but because of the projections like in houses in South Africa, the sun can’t reach them. That means: no energy comes in, and it gets pitch dark in your living rooms. You’ll have to work well with artificial lighting during the day.
Topic function:
Laundry is done in the bathroom
I don’t want to believe someone wants to put a house of over 200sqm and wants to bathe/relax/feel comfortable next to a running washing machine. Added to that is that laundry involves storage and separation of dirty clothes as well as storage and drying of the laundry. Not everything is dryer-suitable and must be hung on a line. Later it then has to wait for ironing day (where again, in the bathroom?). Are you aware of this process?
Garage use: afterwards, going to the freezer room, then to put the clothes in the narrow and too small hallway? Okay, I also read that the freezer room is supposed to store the wardrobe as well, but why not build a) a freezer room and b) a room for wardrobe and such? Why is the room already being mentally converted instead of properly planning? The same applies to the hobby room.
I find planning a hobby room very important. Unfortunately, it is already "full" of office stuff; why someone then wants to repurpose it as storage is beyond me. Why not have a separate storage room?
Some shoes and jackets will be stored in the house technology room, since the entrance through the garage leads through this room.
Why does it have to lead through there??? You can plan this better!!
Plan: freezer room with storage options and laundry*, hallway with storage options, wardrobe area and hobby room, and/or on the upper floor a laundry room with storage options.
About the floor plan:
The green is the staircase (sorry, I forgot to mention)
The floor plan measures 2m x 2.135m
That is tiny and uncomfortable. Furthermore, the children always have to pass through your living area.
I hardly found any useful design guidelines for stairs on the internet. What I did find was a description with these dimensions.
Too small?
Further:
In the bedroom, I miss a place for the bed. The children’s rooms seem disproportionately large to me.
The all-purpose room on the ground floor is a narrow long corridor. A dark corridor.
The windows on the east and west emphasize the length.
The hobby room does not have 15sqm, but 36sqm???
Upstairs and on the ground floor there is a lack of storage options.
The kitchen would be too open to the neighbor for me.
There have already been talks with neighbors. For example, the garage should adjoin the neighbor’s garage.
Then a roof terrace would probably not be possible!
Budget is currently 320,000€, although up to 380,000€ would be possible. The goal, however, is to need less instead of more.
As I said, I was aware that it won’t be realizable at this price.
Conventional construction (straight, square, good) plus slope with simple technical equipment already costs more...
In this respect, I have written way too much here for a castle in the air.