FAO Linus - Heating Conundrum

[Spontaneocus]

Hi Linus. With respect to the thermostats in all the rooms and the 2 wires conundrum, don't use the wires for thermostats. Instead, at the room/zone end of the cable, put a temperature sensor. At the boiler room end, hook that to the controller (which ever you choose). This is exactly what I did here in Scotland with Honeywell kit, which their controllers allow individual sensors for each zone. From that you can then control the temperature you want in each room from their app (because the actuators are at the hot water end, not in the rooms/zone), or even alexa etc. In otherwords, don't put the thermostatic controls in the rooms, put it next to your boiler/furnace) and just use the wires to provide the temperate readings from those rooms to the controller. As long as you have wifi in the boiler/furnace room, you'll be able to use the app for the controller. Heck, you could even cover up the mess from removing the old thermostats by putting a pad/mobile dedicated to using heating app, which could also be used for mood lighting or any other gizmos in that particular room