For most homes, yes. Here is why.

It lets you set a schedule properly, control the heating from your phone, and in some cases learn when you are in. The saving comes from not heating an empty house.
If your current thermostat is a dial you never touch, or you often forget to turn the heating off, a smart one will pay for itself in a winter or two.
If you already run a tight schedule on a decent programmer, the saving is small. It is more about convenience than saving money.
We fit them with most new boilers because they are cheap at that point and the boiler supports them properly. Ask us at the survey.
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