Best smart thermostat for a combi boiler (UK guide)
Most UK homes run a combi boiler. That’s good news: many smart thermostats can work well—if you match them to your existing controls and wiring.
Quick picks
Combi boiler basics (what matters for compatibility)
You’re usually controlling central heating only (hot water is on-demand). The key variable is how your boiler is currently controlled: wired room stat, programmer, or a proprietary control.
If you're unsure, don’t guess
A wrong wiring assumption can mean no heat. If you don’t know what you have, get a heating engineer to confirm the control type before buying.