Sole-water heat pump only with decentralized ventilation system?

Please also address the topic of humidity. Although we have a very high-quality and new system, it is a disaster (it is also properly adjusted and so on). Fortunately, we are now building new and that would be the last thing I would want to come back.

Too dry? Enthalpy exchanger installed?

Please also address the topic of humidity. Although we have a very high-quality and new system, it is a disaster (it is also properly set and so on). Fortunately, we are rebuilding now, and that would be the last thing I would want to have again.

This is physically determined and always the case with a ventilation system. The air JUST HAS to become dry – it cannot be otherwise. No matter how high-quality the system is. Exception as mentioned by .

Honestly, I have never heard of an enthalpy exchanger. My husband said that today there are better options than we had in 2016, maybe that’s what he meant. The dryness here is pretty extreme. In the morning, you practically have to scrape your nose because the delicate mucous membranes are completely dried out. I don’t even want to start on the skin. You can also see it on the parquet, real gaps in the floor. Even though we have set up a powerful humidifier. I don’t trust the whole thing anymore. And nobody really tells you, that’s why my warning. Does this enthalpy exchanger really solve the problem? Which brings me to the next topic: You fight technology with technology again. Maintenance already costs a lot of money and it eventually breaks down. You can’t save that much energy anymore.

Maintenance already costs a lot of money anyway and it eventually breaks down. You can't save that much energy anymore.

Maintenance costs are negligible. You can usually "build" filters yourself for a few cents. And not much breaks down there, as there isn't much technology involved. It's luxury, not energy saving. I never want to miss it again and am even installing one as part of my own major renovation. For that, I treat myself to a fixed-glass (almost frameless) really large window with an unobstructed view of the landscape. I don't have to be able to open it anymore – I don't need to. Luxury problems ;)

It's not just about saving energy, but also about ventilating out moisture, etc. To prevent it from becoming too dry in winter, there are enthalpy exchangers. Basically moisture recovery. However, this doesn't work with decentralized supply air and is only limitedly effective with central devices in winter. But better than no enthalpy exchanger.

Thank you for the instructions, I have learned something new again. Such a part was never mentioned at the time, but I am still skeptical. If it only helps to a limited extent in winter, it would only help me to a limited extent as well, because I really "suffer" from it. Regarding maintenance costs, these are included in the price of the heat pump, which is however very steep. We also have different types of filters and I know that currently one type of filter is ordered quite expensively. By the way, where is your project located, or are there regional threads here as well? We are from Essen :)