Got some more info..
With a sample frequency of every 5 seconds battery life is > 1year.
Yes it's available with a white cover.
I talking to the manufacturer currently.
If it's readable from Domoticz (z-wave?) you can bind it as a zone sensor there.
Ahh - BLE. I'm not sure that's the best option for something that needs to deliver a fairly continuous feed.
Also, the range will be quite short.
Ok, not the actual device I'm looking at there.
Every 5 seconds is more than adequate for environmental control, we're not after close control of the environment (sorry room).
BLE 4.2 comes with significant range improvements, indeed the quoted range is 50m, so adequate for most homes I'd suggest.
The spec says the battery lasts 9-12 months, but the default logging is only hourly.