I'm looking at this one: https://www.amazon.co.uk/Zen-Within-Zen-01-W-Thermostat-Edition/dp/B00XCVV8CS
However no reviews on Amazon. I'm also from the UK and note it's a USA product so I don't know if it will work with UK heating systems.
Does anyone know how I figure out if it will work, and anyone tried them to know if they are any good?
If not, any recommendations for smart thermostat that works in the UK (preferably Zigbee).
A bit of info about my setup, although I don't know which parts are relevant for choosing smart thermostat stuff:
I have gas fired central heating
My boiler is an "Ideal" brand boiler.
In the boiler room, there is also a large tank (immersion heater I think)
Next to the boiler there is a "Honeywell" control panel with buttons for Auto, Manual, 1 hour boost, etc.
The house is 4-storey and split into 2 "zones". The bottom 2 floors are 1 zone and the top 2 floors are another zone.
Each zone has a Honeywell thermostat on the wall.
It's very cumbersome to adjust the schedule on these thermostats and once complete my prize is I get to go downstairs and do it on the other one too. I would love to be able to control it all via HA.
I would love Zigbee devices as I have a strong Zigbee network throughout my house (light switches, blinds, garage door, etc.)