Best Smart Thermostat 2025 Uk 2025. Our top pick, the ecobee smart thermostat premium, isn’t the absolute easiest model to set up, but it’s the best overall for eking out every last btu of efficiency. Keep a close eye on your heating this winter.

However, here are my top 3. The best smart thermostats we’ve tested can control your home’s heating and cooling with your phone or voice—and might help you save on.