The short version
- Scheduling and geofencing produce most of the real savings
- Weather or load compensation lowers flow temperature and improves condensing
- Zoning helps in homes where rooms are used at different times
- A smart stat wired to a badly set-up boiler saves very little
The features that matter
Judge a thermostat by control strategy rather than app design.
- Accurate scheduling with easy overrides everyone in the house can use
- Presence detection or geofencing to avoid heating an empty home
- Weather compensation or OpenTherm-style modulation support
- Optimum start, so the house reaches temperature by the time you want it
- Hot water control if you have a cylinder
Why flow temperature is the hidden setting
A condensing boiler only condenses when return water is cool enough. Dropping the flow temperature and letting the heating run longer at a lower temperature usually improves efficiency more than any app feature. Modulating controls do this automatically; we also set it manually at commissioning.
Zoning: worth it or not
Zoning pays off in larger homes with clearly different occupancy patterns — a home office used all day, bedrooms used at night. In a compact house with an open layout, good TRVs and a single well-placed thermostat usually perform just as well for less money.
Common questions
Will a smart thermostat cut my bills?+
It can, mainly by avoiding heating an empty home and running lower flow temperatures. Savings depend on how you use it.
Will it work with my boiler?+
Most modern boilers support them; compatibility depends on the model and wiring. We check before fitting.
Do I need Wi-Fi everywhere?+
You need a reliable signal at the receiver or hub, not throughout the house.
Can you set my flow temperature correctly?+
Yes — we set it as part of commissioning and explain what it does.
Upgrade your heating controls
We'll fit and commission controls properly, including flow temperature.