ᐅ Are digital thermostats for underfloor heating worthwhile? Is the additional cost justified?

I am currently adjusting all rooms using the thermostatic radiator valves since we don’t have an energy recovery ventilator (we didn’t want one). Once that is done, you rarely need to change anything, right? But when I read here that some are running 25-26 degrees Celsius (77-79°F) in the bathroom, that seems really crazy to me??? We have just under 23°C (73°F).

Of course, you can adjust temperatures afterwards, just not in the same way as with RTRs, but experience shows that this is usually not necessary.

25 degrees Celsius (77°F) in the bathroom is not a problem at all.

In the children's rooms, we actively control the temperature using the RTRs. On weekends, the temperature is turned up, and on the other days, it is turned down. This has nothing to do with saving energy, but the children sleep much better below 20°C (68°F) – and so do I – and the children basically only play in their rooms on weekends. I have been used to higher temperatures in the bathroom for some time now and find it very comfortable.

In the living room, I can't regulate the temperature through the radiator valve (HKV). The required heat output is very low on the ground floor on the southwest side, and the flow temperature in the system is quite high. As a result, the RTR switches on and off frequently there. When the sun is shining, it is always “off,” so I can hardly do without it here.

What supply temperature are you running?
To achieve 26-26°C (79-79°F) in the bathroom, it’s no surprise that you need a high supply temperature.
As a result, many other radiators have to be throttled, causing the heating system to cycle frequently.

bortel schrieb:
The result is that many other radiators have to be throttled --> heating cycles on and off.

I'm never entirely sure what exactly is meant by "cycling," but you're probably right. However, it doesn't bother me since that's what the controllers and actuators are designed for.

Cycling refers to turning the boiler on and off. It is related to the lifespan of the unit. The goal is for the boiler to run continuously to provide consistent heat.