Room thermostats/actuators for underfloor heating

2020-05-27 10:04:44

Hello everyone,

the meaningfulness of individual room control for underfloor heating in new buildings has been discussed many times. I am now at the point that I will do without it. If one - like me - decides to go this route, one might think to omit the room thermostats and actuators directly for cost reasons (about 2000 euros in our case) if they are not going to be used anyway. Is there anything speaking against this? Does the building authority perhaps take a closer look here and check whether everything is installed properly?
As a remark: We are receiving a subsidy for our heat pump. Is there perhaps someone who might be more interested in this topic?

I will probably at least lay a cable from the potential installation site of the room thermostats to the installation site of the actuators so that I could retrofit if necessary.

2020-05-27 13:12:31

Hello everyone,

The meaningfulness of individual room control in underfloor heating systems in new buildings has been discussed many times. I have now reached the point where I will do without it. If you - like me - decide to go this route, one might think, for cost reasons (in our case about 2000 euros), to simply omit the room thermostats and actuators since you won’t be using them anyway. Is there anything against that? Does the building authority perhaps look more closely here and check whether everything is installed correctly?
As a remark: We are receiving a subsidy for our heat pump. Is there maybe someone who might be particularly interested in this topic?

I will probably at least lay a cable from the potential installation location of the room thermostats to that of the actuators, so that I could retrofit if necessary.

Without knowing for sure, I could imagine that at the latest when providing proof of implementation for the subsidy through corresponding invoices, someone might stumble upon the fact that you did not install them. Since they are actually required, I can at least imagine that this might affect the subsidy.

2020-05-27 14:08:43

Are they really mandatory for funding purposes?

2020-05-27 14:15:55

I cannot say that with certainty. We will install them, as an exemption from this is probably very difficult to obtain. (To be honest, I have never read about anyone who was actually exempted.) For this reason, they will be installed and will not affect our funding. Accordingly, I have never checked the fine print to see if they are required for the funding. I can only imagine that, since they are legally mandated, the funding would assume their presence. From my point of view, it would be somehow . Mandatory in new buildings but not required for the funding? But I do not know. Maybe someone else knows more. As said, we will implement them (using KNX buttons). The heating system will be designed so that they are not needed, practically non-functional.

2020-05-27 14:18:28

I’ll quote from another thread:

In new buildings, a heating system is "smart" if it only needs to be set once and never touched again. Room thermostats are required by the energy saving ordinance for heated rooms, but they are unnecessary and can be deactivated. Or you can get exempted from the ERR requirement and save money.
My opinion...

So they are mandatory at first.
If you don’t want to have them installed, no one will trip over that. Just so you know.
But are you building with an architect or a general contractor? I doubt you can successfully remove those devices with a general contractor. If you can find your own plumbing company, it should be more likely to work.

2020-05-27 14:22:58

Thanks in advance. The architect has created the building permit and plans for us, and now we are contracting individually. It's kind of nonsense to install room thermostats and actuators only to leave them disconnected afterwards. From an economic perspective, that makes no sense at all and is a waste of resources. However, if the funding is tied to this, I would of course have to bite the bullet.

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Room thermostats/actuators for underfloor heating

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