HomeMatic-Forum / FHZ-Forum

Hello everyone.
I have couple of wth-2 thermostats and wanted to add few more for remaining rooms to control my radiator valves. Can not find wth-2 available anywhere but found some wth-1. They look exactly the same. Is there any functional difference or limitation I should be aware of ? I plan to pair them with hmip-etrv-2-uk. Thank you.

Hi,

the WTH-1 can't be used without an Accesspoint or CCU.
If you use the WTH-2 with the Etrv-2 without any central unit, you can't make use of the WTH-1.

Best,
Gerti