Design of underfloor heating for KFW 55 house with ventilation system

  • Erstellt am 2023-02-17 16:29:34

HnghusBY

2023-02-20 14:59:32
  • #1

We are building with the general contractor and with that you are fighting windmills. I tried something similar, but it has always been done that way, the system is known and what the farmer doesn't know...
With us, 35 degrees was also calculated, we also have a 20cm installation spacing in the kitchen and I also discussed this with an expert. Of course, he understands me but also clearly says that the general contractor owes me nothing else. Today I wouldn’t build with a general contractor anymore, but two years ago the fixed price was decisive and it still stands.

I would try to have another conversation about the general topic.
 

dream2023

2023-02-20 15:06:02
  • #2
Wow, I can already see and gather your thoughts. Possibly lower flow temperature, 22° room temperature and 24° bathroom temperature.

At least I just saw that the same manufacturer also offers studded panels with different installation spacings.


Here I have to say that I know he owes me nothing. But it must be possible to find compromises here. Of course, we would also pay for anything beyond the standard if the extra effort is reasonable.
 

kbt09

2023-02-20 15:07:04
  • #3
Well, that depends on the exact wording in the performance description. I would definitely have that checked by an expert. Because that is something you cannot change after the house is completed.
 

KarstenausNRW

2023-02-20 15:17:16
  • #4
Yep. These are (unfortunately) the issues that only come up during construction when building with a general contractor/developer. He owes you a floor heating system with a run-of-the-mill standard.

Both the design with the spacing and the supply temperature fit well with the fact that he is offering you the variant that is best (= cheapest) for him. Nowadays, no design in new construction should exceed 30 degrees. But that requires more pipes, heat distribution stations, time, etc.
Thus, a quoted price will naturally be more expensive and in competition – especially now with increased construction costs – the final price mostly counts.

I would be happy for you if you manage to get an adjustment. It is also an investment in the future.
 

kbt09

2023-02-20 15:28:45
  • #5
Well, the definition of standard changes from year to year.

What kind of heating is planned? Heat pump? For example, I find a flow temperature of 35° is not standard but outdated.
 

HnghusBY

2023-02-20 15:55:31
  • #6
We were always argued with "DIN", but if the heating engineer at least agrees to additional costs for, for example, 30 degrees flow temperature, then that is great – which was not the case for us. I’m keeping my fingers crossed for you!
 

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