I work for Vokera and some Linea's will accept Open Therm which I would go for personally but the earlier versions do not. The Linea HE and Linea One will.
May I suggest you wait a few weeks, we have a product coming out that if it is as good as I find it in testing so far is by far the best and most comprehensive thing I've seen for ages; Open Therm and/or standard ON/OFF. Wired and wireless. Plus a lot of other stuff.
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