The Generic Z-Wave Thermostat Driver.
Heating is a gas boiler and rads. House has had rads since built 40 years or so ago. I have eTRV's on the rads - Z-Wave Danfoss LC-13's - I have the house zoned, with remote Z-Wave Horstrmann/IQE/Secure SRT321's (they are all the same device under different names). A Secure SSR302 dual Z-Wave switch is on the boiler (controlling 2 physical zones). A Secure SSR303 Z-Wave switch on the boiler controls the hot water. The hot water tank also has an immersion as a backup and it has a Secure SIR302 Z-Wave switch.
Today I'm playing with a zigbee Drayton Wiser eTRV trying to get it to work - a HE driver is an issue, I'm trying to get a SmartThings one to work. I find sometimes some of my Danfoss ones lose control of the valve and need to get re-calibrated onto the valve. If I can get better battery life that would be a plus.
All fun and games !!!!