By Gordon Kelly

Smart thermostats promise significant savings on your bills by providing better control of your heating. We tried and tested the main four models – Nest, Hive, Tado and Honeywell Evohome – for usability and cost efficiency

Smart thermostats are here and they’re finally worth some serious consideration. The premise is simple and compelling: smarter control of your heating, remote access and the promise of energy savings of 20-30%.

With smart thermometers starting at £200 and the average 2014 UK household heating bill hitting £1,264, buying a smart thermostat would seem a no-brainer. On one condition: they do what they promise.