Thanks, stormjr.
The current setup has two zones, I'd have to run them as a single zone to get the nest working.
Looking less possible, Daikin won't give out any info to…

stormj,
I currently have a BRC230Z4 controller.
Any idea which interface card I am after. Elsewhere someone suggested a KRP4A51-54 but that doesn't seem to do what I need.
Thx, D.

Hi,
I have just had a daikin ducted system installed (The models are Daikin indoor FDYQ71LV1 and outdoor RZQ71KLV4A 7.1kW Single Phase).
I am going to try and get a nest thermostat…