Smart thermostats have become one of the most popular home heating upgrades. But with dozens of models on the market, it can be hard to know what you're actually buying. Here's a practical guide.
What does a smart thermostat do?
A smart thermostat replaces your existing wall thermostat and programmer with a device that can:
How much can you actually save?
Studies suggest smart thermostats save 10–15% on heating bills compared to a basic manual thermostat. The saving is larger if you're currently heating an empty house or have poor scheduling habits. For an average UK household spending £1,200–£1,500 on heating, that's £120–£225 per year.
Popular models compared
Hive Active Heating
The most popular smart thermostat in the UK. Easy to install, good app, works well with most boilers. Includes a smart hub (receiver). Good value at around £170.
Nest Learning Thermostat
Google's product. Learns your schedule automatically and has a premium design. Higher price (around £220) but the learning features are genuinely effective. Works with Google Home.
Drayton Wiser
A good multi-zone option if you want individual room control. Works with TRVs on each radiator for room-by-room scheduling. More complex to set up but very capable.
Worcester Bosch Wave
Specifically designed to integrate with Worcester Bosch boilers (available on their 4000 and 8000 series). Premium option that unlocks full boiler diagnostic data in the app.
Do you need a professional to install one?
Most smart thermostats are designed for homeowner installation if your existing wiring is straightforward. However, if you have an older system, a combi boiler without a standard wiring interface, or you want the thermostat relocated, a plumber or electrician can do the installation quickly and correctly.
NBS Plumbing & Heating can supply and fit smart thermostats as part of any boiler installation — **07507 133204**.