ᐅ Recommendation for Digital Room Thermostat for Air-to-Water Heat Pump

Tolentino schrieb:

Do you mean cheaper in terms of initial cost? Can you say how much cheaper?
And what is the lifespan of such a motor?

Don't worry, just use what the company installs, and unscrew it after the final inspection.

Rule number one for all air-to-water heat pump owners: unscrew that stuff.

I can confirm this as well—I performed a thermal balancing and haven’t had to adjust the controllers since.

If adjustments are needed, they should be made via the Taco.

Hello,
to come back to the original question,

we have the Salus VS35W on the wall. It costs about 35-40 euros, which is not expensive. I don’t think it’s completely pointless; if you remove it, you have to adjust your heating system very precisely. Any regular heating technician will be completely overwhelmed by that.
And if you take the trouble, the heating will only be set for exactly one load case. For example, if it’s sharply cold but sunny in March, the southern rooms will overheat because your heating is set for the load case “bitterly cold, in January, and cloudy sky.” Or you already have sun protection up during the first nice sun rays in March… Not my idea of a good solution!

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

andimann schrieb:

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

It’s hard to argue with that. That’s why I also use switches with displays.

andimann schrieb:

In other words, if it’s really cold but sunny in March, the southern rooms will overheat because your heating system is set to the design condition of “really cold, cloudy January.”

Why would a typical outdoor temperature-controlled heating system assume it’s cloudy? Is there no sun at all in January?

andimann schrieb:

Or you’re already sitting there in March with the sunshade down at the first nice rays of sunshine...

Well, no, that shouldn’t be the case if the heating system has been properly balanced thermally. The thermal inertia of the hydronic underfloor heating and other factors smooth out many disturbances so that a uniform and stable set temperature is possible in all rooms (even with a slight temperature variation depending on the location of 2–3°C (4–5°F)).

In other words, it is possible to achieve the required temperatures year-round without errors. However, it’s a matter of proper settings.

andimann schrieb:


And if you put in the effort, the heating will then be set for exactly one load case.

That's nonsense. The heating is controlled by the return temperature. You set the target return temperature on the air-to-water heat pump, and it will keep supplying heat to the house until that target is reached. If it exceeds it, the unit switches off.

I maintain around 21°C (70°F) inside the house all year round, regardless of whether it's -20°C (-4°F) or +35°C (95°F) outside.

Just fully open all heating circuits and lower the curve until it fits.

By the way, small wall-mounted digital thermometers with hygrometers cost about €10 (around $11) each.