I would advise against an intelligent thermostat, we had a new system fitted a couple of years ago and the engineer recommended we had one. It seems to spend most of its time trying not to have the heating on in various ways, delayed start, switching it off half an hour before and the final annoyance it only allows the boiler to be on for 20mins at a time even if the house has not reached the desired temp. Luckily all these crazy functions can be switched off but it now acts as a standard thermostat sowas a waist of money.
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