Energy consumption experience values?

When designing the heating and the pipe system, make sure that your heating specialist performs a room-by-room heating load calculation - don’t be fobbed off with "15 cm pipe spacing everywhere". Validate the planned heating system - consider the U-value and do a heating load calculation for your entire building using the heating demand calculator (you can find the values for this in the Energy Saving Ordinance documents).

I keep reading that. What does that mean then? That every room gets a different pipe spacing? Our heating installer planned 15 cm everywhere and 10 cm pipe spacing in the bathrooms as well as 10 cm at the exterior walls in the living rooms.

What you should know about underfloor heating, well it should look like this:



And not like this:



The heating circuits should not exceed 100m in length and should be roughly the same length per room. The distance of the heating pipes in front of floor-to-ceiling windows should be about 5cm...under the underfloor heating there should be thermal insulation and impact sound insulation. In the area of doors or expansion joints, the supply and return pipes of the heating circuits should be specially protected. The water should be low in oxygen. The expansion vessels must be made of stainless steel. A hydraulic balancing should be carried out after the system is put into operation and a fine adjustment in the first winter.

Attention layman's opinion:

Should the grounding not be done by the MEP planner and not by the architect?



Yes, each room has to be considered individually...within one room we sometimes have three different pipe spacings depending on where they run.

Foreword: I am only an amateur.
From a distance, it is difficult (impossible) to say whether it fits. Rough approximation: many windows or large exterior wall surfaces -> smaller installation distances. Furthermore, it is generally (very roughly) assumed that the heating heats the critical room, all others follow. In other words, if your heating always needs 40°C flow temperature for a poorly designed room, your heating must deliver that. However, heat pumps become less efficient the higher the flow temperatures. Other oversized rooms, for example, actually only need 28°C and regulate themselves "down". The heat cannot be absorbed. The heating cries :D Therefore, especially with [WPs], it is advisable to take the trouble to consider each room individually.
In addition, it is important since you also have to size the heating. If it is too large, it costs too much; if it is too small, you heat in winter with the electric heater (annual performance factor of 1).

wow,
I copy the info and pictures and print them out.
just, who do I give them to :-)

seriously, after every further important work step, we will have an expert come to check, but they can only determine the current condition and then file complaints and insist on improvements.
the way things are going on our construction site, I have little hope that the next things like heating etc. will go smoothly.
Why did we get into this mess?
Because we were simply... stupid. and tired and drained from months of back-and-forth comparing when choosing a construction company. And too naive and trusting.
We let ourselves be blinded by the logo "Test winner at Focus Money Prefabricated House Provider."
And unfortunately didn’t have the foresight to hire an external independent building expert from the start for a build that was supposed to only take 4.5 months until move-in
(everyone laugh)
Maybe it would have gone differently if the construction and everything before hadn’t (only) been done by my sister and me,
but if men had handled the conversations, contracts, etc.
In hindsight, I almost think someone thought, great,
two naive women who are also under time pressure to move out of apartments.
A feast found :-)

Good evening,

seriously, although after every important work step we will have an expert come to check, but he can only determine the current state, and then simply complain and insist on improvement.

That is still better than having no knowledge of the true status quo; it’s not like building a house doesn’t cost money.

Why did we get into this mess?
[...] And were too naive and trusting. Let ourselves be blinded by the logo "Test winner at Focus Money Prefabricated House Providers."

I looked at it for the first time now; I come from the other camp. Which one of the 5 "test winners" did you choose?

Looking back, I almost think someone thought, great,
two naive women who are under time pressure to move out of apartments.
A feast found :)

You shouldn’t look back at all, but only forward; you know now what you did wrong anyway. Best conditions to do it better now – in the thick of it with your expert ;)

Rhenish greetings

:D
it starts with D and ends with t.
if i had any idea how, i should create something like a website or blog,
where i could describe the photos and key data or the entire scope
of things that went wrong and are going wrong with us.

maybe we just have a monday construction...