Worcester Bosch EasyControl Smart Thermostat, Plus 3 ETRVs review
Homes that already have a Worcester Bosch boiler and want zoning plus the extended guarantee.
By Tom Calder · Price last checked 10 September 2026 · price indicative
If you already own a Worcester Bosch boiler this is a strong package: native EMS 2 modulating control, hot water scheduling, three Smart TRVs in the box, and a system that scales to 19 Smart TRVs across 20 zones on Worcester's own figures, with an up-to-12-year guarantee when installed with one of their boilers. If you do not own one, the maths falls apart — you need the separately sold EasyControl Adapter to convert EMS out to OpenTherm, iRT or a 230V on/off contact, on top of the bundle's own price. Worcester states the EasyControl boosts a system's ErP rating by 5% with at least three Smart TRVs, or 4% without Bosch TRVs; those are its own figures and explicitly conditional on the installation.
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- Three Smart TRVs included, scaling to 19 TRVs across 20 zones on Worcester's own figures
- Native EMS 2 modulating control on Worcester Bosch boilers, plus hot water scheduling
- Up to a 12-year guarantee when installed with one of Worcester's own boilers
- Not an OpenTherm device — any non-Worcester boiler needs the separately sold EasyControl Adapter, the biggest hidden cost on this page
- It costs roughly double the Drayton Wiser kit for comparable zoning if you do not own a Worcester boiler
- Worcester directs buyers to accredited installers rather than DIY, and the headline guarantee is conditional on how it is installed
Who shouldn't buy this
your boiler is not a Worcester Bosch — Drayton Wiser Kit 1 gives comparable zoning for around half the money and needs no adapter.
Key specs
| Works with | Worcester Bosch boilers natively; others need the EasyControl Adapter |
| Control | EMS 2 modulation, not OpenTherm; hot water scheduling included |
| Zoning | Multi-zone: 3 TRVs included, up to 19 TRVs across 20 zones |
| Fitting | Installer-fitted; Worcester points buyers to accredited fitters |
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