Precise control of individual rooms ...

You get the Thermostat HR25 securely packed in a blister pack.
A stable scissors is only needed once to open. The advantage of this package is, you can see immediately whether it is absolute new.

The kit includes the HR25, two adapters for Danfoss valves and manual. The two required AA batteries (AA) are not at.

The manual is understandable. German is the only language. One side of the sheet describes the initial setup, the back of the programming.

The attachment to one of my more than 30-year-old Heimeier valves ran smoothly. For Danfoss are, as I said, with adapter.
The programming is actually with the instructions easily, only I am afraid that I again need the manual after a while. The thermostat is easy to switch to manual operation. To adjust the chrome ring forwards serves. This is very smooth and therefore unfortunately also quickly adjusted accidentally.
About the technology: A small motor moves a gear rim which in turn presses on the pin located on the radiator valve.

The function is impeccable, even with several switching times that are possible on different weekdays.

What I do not quite like it, is the white plastic of the case, he could be a bit high.

Functionally, you may have a problem if you know how I want to use in an older home the thermostat. Are with me, how many 70's houses, the ribbed pipe radiator installed in wall niches. At that time this was done because the Rippenheizkörper were quite thick, compared to the modern panel radiators.
Now even the window sills are quite low, the display of the programmable thermostat is difficult to read. The thermostatic head can be a little decrease, without the valve assembly.

Very good to use the HR25 is but in modern flat radiators which are freely mounted on the wall.

Another tip:
Please Think carefully about where you want to use them the thermostat. Modern heating systems are already controlled by the system and cooler rooms over the existing thermostat.
The HR25 is worthwhile only in rooms that are rarely used and, for example, should be daily or at certain days of the week heated up only in the evening times. But often, as in my living room, 3 radiators available, so 3x changeover for approximately 120.-. This I would never save.

If you have no influence on the programming of the heating system (eg rent) can be found again many uses. The own heating system can easily be programmed accordingly if no one is at home during the day. For rent this is the HR25 per room or per radiator now also possible during the day and cooler when you go home is already warm.

I also consider the use in rooms with floor heating by the return of good to turn here to return by the floor loop temporarily.

Conclusion:
++ Well finished
++ Fairly simple operation
++ Quickly and easily cultivated
++ Precise control
++ Many switching possibilities
++ Very well thought-out concept
+ Display clear and mostly easy to read
o without Rating: No batteries enclosed
- Housing plastic could be a bit high
- Dial (the chrome ring forwards) to smoothly
- For radiators in niches below the window (eg in old buildings) display difficult to read