HausbauFrage
2023-12-08 14:33:59
- #1
A provider is not obligated to do everything the customer wants. Ask your representative how such change requests are handled.
We will do that. We just wanted to know beforehand which regulations apply. Apparently, the provider is relatively free in the design.
Is that really the case? Well, I know about the 20/24 degrees, but that 35 degrees flow temperature is fixed is new to me.
I wouldn’t look for any legal framework conditions there. The topic is important to you regarding efficiency and comfort and rather a burden to the house builder that he wants to handle as cheaply as possible. Make sure you address this very early and insist vehemently that it is optimized. If in doubt, have your own calculations done and try to push them through. In the end, it’s just about laying a few pipes closer together, making a few more heating circuits, and in the worst case installing a larger heating circuit distributor and additionally using a wall in the bathroom. The first three points don’t matter at all to the executing company, the last point is probably the most effective but certainly also the most complicated to enforce. Yes, there will then be some additional charges, but I don’t think anyone should object to that.
And don’t hang on too much on the calculation. I would generalize and say that for most prefab house providers a heating load calculation is a document that has to be created at some point somehow, but otherwise not much brainpower goes into it.
We will try. We would accept reasonable additional charges. For that, we wanted to understand what is actually owed currently and where the payable extra effort for the company begins.
You always have the option not to approve an execution plan until all questions or requests or corrections have been answered/incorporated.
But hardly anyone will implement flow30 voluntarily and free of charge for you, because it involves somewhat more effort in planning and may also cause additional costs during installation. You then have to accept these additional costs – prefab house providers generally charge well for this (unless you have clarified everything contractually in advance).
It is also possible that they object and say it is not possible. Then you have bad cards, because if you want to fight expert reports with counter-expert reports, you will eventually completely blow your timeline (price guarantee etc.).
If in the end we want a design that goes beyond the scope required by the DIN, we are also willing to pay for it.
Morning
What is fixed contractually then?
So far, only a floor heating system according to aRdT.
Definitely be prepared for a substantial surcharge if you want the flow temperature at 32 or 30°C. From experience, we’re talking about a four-digit amount here, so don’t be too surprised.
It has to be recalculated, more heating circuits are required, i.e. larger distributors, more tubing, more installation effort, etc.
The work and the technology are especially expensive.
As mentioned above, we are basically willing to pay an extra price.