Smart thermostats give you scheduling, remote control and room-by-room heating so you stop paying to warm an empty house. For homes with gas central heating and irregular routines, they're one of the highest-impact upgrades you can make.
Why smart thermostats matter
Heating is the single biggest slice of most UK energy bills. A thermostat that learns your routine, avoids heating empty rooms and lets you nudge the temperature down from your phone typically pays for itself within a heating season or two.
Recommended products
Filter our reviews to match your home and priorities.
tado°
tado° Smart Thermostat X - Starter Kit (Wired) & Bridge. X
The latest generation of tado's heating control, now featuring Matter compatibility and a more responsive interface for UK wired heating systems.
Matter-compatible smart heating for seamless multi-platform integration.
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Hive
Hive Thermostat Mini For Heating Control (Self Install), With Hive Nano 3 Hub
A compact, entry-level smart thermostat designed for UK homes with combi boilers, enabling remote heating control and OpenTherm compatibility.
Seamless smartphone control of your combi boiler to eliminate heating an empty home.
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Hive
Hive Thermostat for Heating & Hot Water Control (Conventional Boilers) with Hive Nano 3 Hub
A comprehensive smart heating solution designed specifically for UK homes with conventional boilers and separate hot water tanks.
Seamless remote management of both your home heating and hot water schedules via a single app.
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tado°
tado° Smart Thermostat X – Starter Kit Wired
The tado° Smart Thermostat X is a modern, Matter-enabled wired starter kit designed to replace traditional wall thermostats with app-driven efficiency. It focuses on streamlined home integration and granular heating control via your smartphone or voice assistant.
Matter-compatible smart heating for seamless multi-platform integration.
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Tado
Tado Smart Thermostat V3+ Starter Kit
A sophisticated, high-end smart heating system that focuses on automation and multi-room control. It is particularly effective for those looking to integrate geofencing and weather adaptation into their UK home.
Advanced geofencing and weather-compensated heating logic.
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Beok
Beok Battery-Powered 2-Wire Smart WiFi Thermostat
An affordable, battery-powered smart thermostat designed for simple 2-wire UK boiler connections, offering app and voice control without complex rewiring.
Simple 2-wire DIY-friendly installation
Read ReviewBuying advice
Check boiler compatibility first
Most work with combi and system boilers, but confirm your wiring (and whether you have a hot water cylinder) before buying.
Decide if you need multi-zone
Single-thermostat models are cheaper; multi-zone kits cost more but shine in larger homes with rooms you rarely use.
Look for genuine learning, not just an app
The savings come from smart scheduling and presence detection — a plain app-controlled stat saves less than a learning one.
Frequently asked questions
Do smart thermostats actually save money on energy bills?
They can, when they solve a real problem in your home. Our reviews focus on the products that make a measurable difference rather than novelty gadgets, and each one explains when the savings justify the cost — and when they don't.
Does PowerGuardian sell smart thermostats?
No. PowerGuardian is an independent UK energy information service. Some links are Amazon affiliate links and we may earn a small commission at no extra cost to you, but our reviews and ratings always stay advice-led and independent.
How does PowerGuardian rate smart thermostats?
Every review is scored across six dimensions — Energy Saving, Ease of Use, Value, Features, Installation and Reliability — which combine into an overall PowerGuardian Rating out of 5. See our methodology for full detail.