« Last post by davegravy on November 18, 2014, 12:12:16 am »
There is nothing in the template that decides what unit the temperature is interpreted as. All my devices works as expected (I also use Celsius) and I don't recall having to do anything special. But I do think some devices has a configuration setting to toggle the unit it interprets values as - you should read the manual for your device.
See page 5
As far as I can tell from the documentation, the device allows you to switch display units but not the units it expects as input via ZWave.
Given this, I assume I'm out of luck until/unless some conversion code gets implemented somewhere in LMCE.