How much can a smart thermostat save in the UK?
Most UK studies suggest smart thermostats save between GBP75 and GBP150 per year on heating bills. The saving depends on how efficiently your heating is already controlled. If you already have a programmable thermostat, savings will usually be at the lower end.
Does turning down the thermostat by 1C really save 3%?
Yes. This is a well-established rule of thumb for UK homes with gas central heating. The greater the temperature difference between inside and outside, the faster heat escapes. On a GBP1,200 gas bill, a 1C reduction saves approximately GBP36 per year.