jim8flog
Journeyman Pro
Thanks for input so far.
Excuse my ignorance, but if I went for a Hive or Nest system, do I need to change thermostat AND controller?
And is this a DIY job or do I need heating engineer or electrician?
Yes it requires a part P certificate to be issued as the wires have to go in the boiler (even though it just a simple job of connecting the right wires to terminals in the boiler). I know where my wires go on my boiler I would also need a registered gas plumber as one of the covers needs to come off and the regs says I cannot take the cover off myself.
Your existing thermosat would have mains power to it.