Good morning,
sorry that I’m only writing now!
why he maybe thought that energy efficiency is very important to you
which is basically not wrong:
U-values according to Ubakus.de:
36.5 Ytong: 0.26
36.5 Poroton: 0.21
24 Ytong + 12WDVS: 0.18
24 Poroton + 12WDVS: 0.16
you can’t really say that generally without knowing the type of heating etc., but A+ is of course easily achievable with 24 Poroton and 12 cm WDVS, while with a poor (heavy/cheap) 36.5 Y-ton you probably have to be satisfied with around D. This all doesn’t sound unrealistic (U-values above calculated with a medium-density Ytong)
It’s normal in construction: ask 5 people and you get 10 opinions. Everyone thinks they know exactly and everyone else has no clue.
Before you worry about the wall buildup, you should define your requirements for it:
should it be: as soundproof as possible, as cheap as possible, as thin as possible, as breathable as possible, as thermally insulating as possible, ...? Or a combination of these goals?
From that you can then find the ideal wall buildup for you!
- monolithic Ytong 36.5, for example, would not be very soundproof, moderately thermally insulating, rather cheap, average thickness and well breathable
- monolithic Poroton 36.5 moderately soundproof, good thermal insulation, somewhat more expensive... etc.
- ... etc.
So heating type should be an air-water heat pump or geothermal with underfloor heating combined
On the topic of thermal insulation... you write that Ytong is moderate and Poroton is good in thermal insulation. I have read something different again. So what now? Is there a report or a test somewhere??
But thanks anyway
BMW: 240 HP
Mercedes: 190 HP
Audi: 210 HP
VW: 170 HP
You can’t just say that generally. It depends on the models.
And which one is more expensive depends more on the region and the installer than on the general assumption that one is cheaper than the other.
Basically it is of course correct to first consider what is especially important to you.
OT:
With today’s car models the engines are unfortunately over-engineered.. What use is a 1.4L with 170 HP? Before there was a 2.0L with 150–170 HP.. -> More consumption and shorter engine life
What I saw on Benz24, in total there isn’t really much difference between Poroton and Ytong..
PS: Edit: Although I just see that the Ytong 365 would even be cheaper..
BMW 61 thousand euros, Mercedes 62 thousand, Audi 61,500, VW 45,000. Who has the more economical horsepower value plus U-value? Monolithic with Ytong is simply cheapest in northern Germany, then screw the 10 euros more heating costs per month. By the time I have paid off the extra cost for all that U-value KfW stuff, I’m dead.
Good point = )