ᐅ Ground-source heat pump with horizontal ground collector and two heating circuits

derstefanm schrieb:
As soon as my wife steps on warm flooring there, her feet start to swell.

Not on the ground floor? 😕

asks Yvonne

Yes, certainly on the ground floor as well, but she also wants to be able to retreat upstairs.

So, if you have prejudices against underfloor heating, I can understand that and provide some arguments. But why do you apply your prejudice against underfloor heating to the upper floor? Where exactly is the difference? Does your wife float over your ground floor and have to land on the upper floor????

Thank you for your reasoning. I will make another attempt. Personally, I support underfloor heating throughout the entire house, but it has to please both of us. However, this needs to be decided soon as it is crucial for the floor construction (screed). As I mentioned, efficiency is a concern for me. Why install a heat pump only to cancel out all savings at the same time through the second heating circuit?

derstefanm schrieb:

One more question: does it make sense to install solar panels on the roof in addition to a heat pump?

It’s a matter of calculation, since in summer — when you don’t need heating — you get good energy yield (but with modest feed-in tariffs / power purchase agreements). In winter, it’s the opposite. Unfortunately, the feed-in tariffs are decreasing faster than the cost of solar panel systems, so it’s becoming increasingly difficult for the system to pay off within a reasonable timeframe. Energy storage systems, such as batteries, could be interesting because they allow for higher self-consumption. However, at this point in time, I’m still skeptical about the long-term reliability of the technology 🙁

So you’re confirming my gut feeling. If batteries are added, the price increases even more. I have a price of €6500 (about $7000) for a 5kW system including installation, and according to calculations, it will generate around €7500 (about $8000) over 20 years—but then you still have to add batteries or cover repairs, etc. There is barely any profit left.

I think I’d rather just leave it.