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

Hello,
I have a fundamental question regarding our new construction. We are planning to install a heat pump and underfloor heating in the ground floor as well as the bathroom upstairs. The bedrooms, however, will be equipped with regular radiators; my wife prefers this because she believes underfloor heating is not particularly healthy. My question is whether the heat pump can still operate efficiently in this case, since regular radiators require a higher supply temperature. Can anyone help me with this?

Convince your wife about the underfloor heating in the bedroom! What is the statement "not particularly healthy" based on? Current findings or information about underfloor heating from 25 years ago? Modern underfloor heating operates with such a low flow temperature (VLT), so why should it be more harmful than a warmer wall radiator?

If two heating circuits are necessary, it is usually better to choose a gas condensing boiler, as it has fewer issues with high flow temperatures (VLT)…

What exactly is supposed to be harmful about underfloor heating? That "gases or pollutants" from the flooring materials are released due to the heat? With low flow temperature (VLT), this is excluded.
I would recommend choosing one system: a gas condensing boiler with radiators and underfloor heating on the ground floor, using larger circuits and higher flow temperatures (VLT) there; or a heat pump with smaller circuits and underfloor or surface heating on the upper floor.

My parents-in-law built their house in 2003 and installed a gas condensing boiler with underfloor heating on the ground floor and radiators upstairs, which requires two pumps. However, as soon as my wife walks on the warm floor there, her feet swell. The supply temperature is 40°C (104°F) because too many rooms were connected to one circuit at the time. Now she has similar concerns and, also due to dust issues, does not want underfloor heating upstairs. I am just worried that the advantage of the heat pump might be negated by having two heating circuits.

derstefanm schrieb:
My parents-in-law built their house in 2003 and have a gas condensing boiler with underfloor heating on the ground floor and radiators upstairs, which requires two pumps. However, as soon as my wife walks on the warm floor, her feet swell. The supply temperature is 40°C (104°F) because back then too many rooms were connected to one circuit, and now she has the same concerns and doesn’t want underfloor heating upstairs due to dust issues. I’m worried that having two heating circuits will cancel out the advantage of the heat pump.

Our heat pump reached a maximum supply temperature of just under 27°C (81°F) this winter. The floor feels slightly warm to the touch, and the air temperature is about 22°C (72°F) (lower in the bedroom, of course, which also affects the floor temperature). You probably won’t get swollen feet there. By the way, dust circulation is actually less than with conventional radiators, which have a higher supply temperature and therefore stir up the air much more.

I wouldn’t have thought that 27 degrees (80.6°F) would be enough to warm up the house. I’ll have a discussion with my wife because this topic is quite important to me at the moment.

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