ᐅ Smart home system for underfloor heating in a KfW40+ energy-efficient house?
Created on: 13 Apr 2022 21:19
J
Juicy1990
Good morning dear forum,
We are currently building; the shell is almost complete, and the plan is to have a 165 sqm (1776 sq ft) city villa without a basement built to KfW40+ standard. Right now, we are going through the plumbing and electrical systems throughout the house, discussing various details.
There will be no wired smart home system. However, Homematic wireless will be used for the roller shutters and heating (only underfloor heating). Later, additional features could easily be added to this setup. Even a layperson like me can manage that… 🙂
Right now, I’m stuck on the heating control. Does controlling the underfloor heating manifold with electric actuators provide significant added value? Our heating installer has a clear opinion and says no! The idea is that properly setting up the underfloor heating once will yield a better annual performance factor than with smart home control. For me, that was basically a given.
By the way, the heating system will be an air-to-water heat pump. On the roof, there is a 12 kWp photovoltaic system with a 6.5 kWh battery storage. That might be relevant somehow.
What are your thoughts on this?
If you need more information, I’m happy to provide it.
Thank you very much for your feedback and best regards!
We are currently building; the shell is almost complete, and the plan is to have a 165 sqm (1776 sq ft) city villa without a basement built to KfW40+ standard. Right now, we are going through the plumbing and electrical systems throughout the house, discussing various details.
There will be no wired smart home system. However, Homematic wireless will be used for the roller shutters and heating (only underfloor heating). Later, additional features could easily be added to this setup. Even a layperson like me can manage that… 🙂
Right now, I’m stuck on the heating control. Does controlling the underfloor heating manifold with electric actuators provide significant added value? Our heating installer has a clear opinion and says no! The idea is that properly setting up the underfloor heating once will yield a better annual performance factor than with smart home control. For me, that was basically a given.
By the way, the heating system will be an air-to-water heat pump. On the roof, there is a 12 kWp photovoltaic system with a 6.5 kWh battery storage. That might be relevant somehow.
What are your thoughts on this?
If you need more information, I’m happy to provide it.
Thank you very much for your feedback and best regards!
In principle, you can get exemptions from various requirements in the Building Energy Act and/or implement alternative measures. Whether these are approved is another matter.
95%... well, that might be the case with the mentioned engineer, but ultimately, the local authority makes the decision.
Our solution was simply not to install it, to avoid stirring up trouble.
95%... well, that might be the case with the mentioned engineer, but ultimately, the local authority makes the decision.
Our solution was simply not to install it, to avoid stirring up trouble.
P
Pwnage61914 Apr 2022 11:12Hello
I have a question about ERR.
We are currently building a new semi-detached house.
We have a KfW55 semi-detached house, but we do not have our own heating system; the entire development is supplied with district heating.
The municipal utility operates a combined heat and power plant for about 70 units in the development, and the heat is supplied via district heating.
In the basement, we have a small transfer station where the heat is transferred to us.
Is an ERR exemption also possible for us?
We do not have a heating system that regulates itself automatically (e.g., air-to-water heat pump).
I have a question about ERR.
We are currently building a new semi-detached house.
We have a KfW55 semi-detached house, but we do not have our own heating system; the entire development is supplied with district heating.
The municipal utility operates a combined heat and power plant for about 70 units in the development, and the heat is supplied via district heating.
In the basement, we have a small transfer station where the heat is transferred to us.
Is an ERR exemption also possible for us?
We do not have a heating system that regulates itself automatically (e.g., air-to-water heat pump).
H
Hausbau 5514 Apr 2022 11:15Benutzer200 schrieb:
You can contact an engineering firm well known online (with this success rate), additionally consider the experiences shared by another community for building services enthusiasts. The exemption is relatively easy to obtain but must be applied for individually based on your specific project.
P.S. The exemption is explicitly stated in the building energy act legal text, somewhere around § 100 +/- Being well known does not guarantee quality. It’s no different for engineering firms than for users. Better a poor answer than none at all?
B
Benutzer20014 Apr 2022 11:22Hausbau 55 schrieb:
Being well-known does not prove quality. It’s the same for engineering firms as it is for users. Is a poor answer better than no answer at all? Being well-known is not proof of quality. Hundreds of positive experiences are. Since no links are allowed here and I am generally known for well-founded answers and experience (and real estate has been my profession for decades), you can safely assume that an ERR exemption is relatively easy to obtain. 😉
B
Benutzer20014 Apr 2022 11:23Pwnage619 schrieb:
Is an ERR exemption also possible here?In principle, an ERR exemption is always possible. However, you need someone (your heating engineer) who can justify the exemption request in order for you to submit the application.B
Benutzer20014 Apr 2022 11:27guckuck2 schrieb:
Our solution was simply not to install it, so as not to wake sleeping dogs. That’s the pragmatic approach 😎
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