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 · Updated 24 July 2026 · Price checked against our tracker
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 £341.70. 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.
£341.70 inc VAT (£284.75 ex VAT) at PlumbArena for the white 7736701555 bundle, checked directly on 24 July 2026. Be wary of listings quoting a far lower price — those are usually the standalone EasyControl thermostat with no TRVs, which is a different product costing less than half as much. If your boiler is not a Worcester Bosch, add the cost of the EasyControl Adapter on top.
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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
- At £341.70 it is 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
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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