Recommendation for digital room thermostat for air-to-water heat pump

You mean cheaper in terms of purchase price? Can you say how much cheaper? And what is the lifespan of such a motor?

don't worry, use what the company installs, and unscrew it after the acceptance. 1st rule of all air-water heat pump owners: unscrew that stuff.

I can also confirm, I have done a thermal balancing and haven’t touched the controllers since then.

If adjustments need to be made, then through the [taco].

Hi,
to come back to the initial question,

we have the Salus VS35W on the wall. Costs around 35-40 euros, not a fortune. I don’t find it completely pointless; if you remove it, you have to set your heating very precisely. Every normal heating engineer is totally overwhelmed by that.
And if you make the effort, the heating is then set for exactly one load case. In other words, if it’s really cold but sunny in March, the southern rooms will overheat because your heating is set to the load case "really cold, in January and overcast sky." Or you’re already sitting there in March with the first nice rays of sunshine with sun protection on.... Not my thing!

Aside from that, I find it very practical to simply have a thermometer and a clock hanging on the wall in every room...

Best regards,

Andreas

Apart from that, I find it very practical to simply have a thermometer and a clock hanging on the wall in every room...

It is hard to argue with that. For that reason, I also have switches with displays.

In other words, if it is biting cold but sunny in March, the southern rooms will overheat because your heating is set to the load case "biting cold, in January and overcast sky."

What reason would the usual AT-controlled heating have to assume that it is overcast? Is there no sun in January?

Or you are already sitting in March with the first nice sun rays with sun protection there....

Hmm no, this should not be the case either if the heating has received a thermal balancing. The inertia of the water-based underfloor heating and other factors "smooth out" all these disturbances to such an extent that a homogeneous and constant set temperature in all rooms is possible (yes, even with a slight spread depending on the location of 2-3 degrees). In other words, yes, it is possible year-round to achieve the necessary temperatures without ERR. However, it is a matter of settings.

And if you make the effort, the heating is then set for exactly one load case.

that's nonsense. the heating is controlled by the return flow, you set the target return flow on the air-water heat pump, and it pumps heat into the house until that is reached, and if exceeded, it switches off.

I have 21 degrees in the house all year round, no matter if it's -20 or +35 degrees outside.

simply open all heating circuits completely, and lower the curve until it fits.

small wall-mounted digital thermometers with hygrometers cost around €10 each, by the way.