Air-to-water heat pump - Nest Thermostat

This is how it looks... and if at all, only on radiators... definitely not on a low-temperature underfloor heating... and I assume something like that comes into the house if you’re already talking about an air-water heat pump...

Forget that quickly and just have the standard 0815 parts for 10 euros slapped on the wall... you won’t use them again anyway after the initial setup...

No matter the manufacturer: an ERR thermostat has no place in a modern house...

I wouldn't agree with that unconditionally. Especially in well-insulated houses with a lot of window area (solar energy) or a show fireplace (which also provides some heat), it can sometimes make sense, because a hydraulic balancing cannot take something like that into account. I notice this in our kitchen when I cook on several burners; the room (24 sqm and the door always open) becomes noticeably warmer.

I contacted Vaillant and received the response that Nest and Netatmo do not have the necessary intelligence for the complex air-to-water heat pump system. These controllers are better suited for apartments with gas boilers. The lady named the Multimatic 700 from Vaillant as a suitable and "intelligent enough" alternative... I looked into it and honestly don't see any greater intelligence than with the others. Also twice as expensive and twice as ugly :/

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Oh yes, precisely your examples show the nonsense – and possibly also your ignorance.

How is such a sluggish heating supposed to react to something like your cooking action? Or to the fireplace? You just open the window in a rustic manner and that's that – whether with or without a thermostat makes absolutely no difference.

A thermostat cannot lower the temperature in the house – that only works in the advertising of the "intelligent and connected heating systems."

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Oh yes, your examples precisely show the nonsense – and possibly your ignorance .

How is such a sluggish heating system supposed to react to something like your cooking action? Or the fireplace? You just open the window in a very rustic way and that's it – whether with or without a thermostat is completely irrelevant there.

A thermostat cannot turn down the temperature in the house – that only works in the advertising of "intelligent and networked heating systems"

Your argument is not correct. If I cook and the heating circuit turns off 1-2 times due to the increased temperature, I have saved energy (compared to airing out the excess energy), then the heat has been distributed. I don’t experience it getting colder in the short term (it’s only about a few degrees anyway), but I don’t unnecessarily dump energy into the house. It’s much more extreme with windows – half the house can get enough sun to heat (the heating loads are low!), but on the north side the bathroom would become too cold. I also recall that in particularly well-insulated buildings KfW EER are mandatory, and I don’t think that’s just for fun.

Wrongly remembered, you can free yourself from that nonsense.

And you save energy if it cuts off the heating circuit because the air has been warmed? Foolish assumption – likewise that you lose a lot of energy through shock ventilation. Air, as the worst heat carrier, is replaced and the warmed floor or walls remain normally warm.

Especially since your thermostat also has a hysteresis, so usually not much would happen while cooking. Or is that thing hanging next to the stove?

But as I said, cutting off the circuits brings you nothing...