I have a Honeywell Home thermostat running a heat pump style boiler for our hydronic in slab heating.
I would like to replace it with a ‘smart’ HA friendly thermostat.
It is battery powered but I have power close by I could run. The wires back to the outdoor unit are the classic 2 wire in black and black/white. See photos.
I’m in Australia if that is relevant.
Photos show how it is wired.
Let me know what thermostats you would recommend.
I’m not sure if your location will limit your options but anything that supports Z-Wave or Zigbee will be a great option. I use Honeywells T6 Pro Z-Wave Thermostat and it’s been super reliable for over 6 months and works exactly how you expect it to.
No specific recommendation for, but I’d recommend against the ecobee Premium thermostat I bought. While the built in smart functionality and app are nice, I ended up just integrating it via HomeKit which doesn’t allow for all the functionality.
In hindsight, I wish I’d bought a simple thermostat with basic scheduling that I could adjust via Zigbee or wifi locally without any cloud dependency, and then built whatever smarts I wanted using Home Assistant automations.
