Wiser 1 Channel vs 2 Channel kit: which suits your boiler?
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The short answer
Choose Wiser by Drayton 1 Channel Smart Room Thermostat Kit (2nd Generation) if…
you have a combi boiler (no hot water cylinder) and want OpenTherm.
Choose Wiser by Drayton 2 Channel Smart Room Thermostat Kit (2nd Generation) if…
you have a system or conventional boiler with a hot water cylinder.
| Feature | Wiser by Drayton 1 Channel Smart Room Thermostat Kit (2nd Generation) | Wiser by Drayton 2 Channel Smart Room Thermostat Kit (2nd Generation) |
|---|---|---|
| Cost | ||
| Lowest verified price | £178.99 at Screwfix (checked 6 November 2026) | £178.99 at Screwfix (checked 6 November 2026) |
| Also needed | Nothing extra | Nothing extra |
| 3-year cost (price + required subscription) | £178.99 | £178.99 |
| Subscription | None | None |
| Compatibility | ||
| UK heating systems | Combi boilerSystem boilerRegular boilerHeat pump (check)OpenThermNeutral wire: not statedRenter-friendly | Combi boilerSystem boilerRegular boilerHeat pump (check)OpenThermNeutral wire: not statedRenter-friendly |
| Buy | ||
| View at Screwfix | View at Screwfix | |
Open in the interactive comparison (all rows, differences mode) →
How we assessed this:researched from manufacturer documentation, installation manuals and UK pricing. Not hands-on tested. Our method
Differences that matter
Boiler type
Wiser describes the 1 Channel kit as for combi boilers and the 2 Channel kit as for conventional boiler systems with separate hot water control.
OpenTherm
Wiser lists relay and OpenTherm for the 1 Channel kit; for the 2 Channel kit it lists a relay connection only.
Price and stock
Both were £247.80 at Wiser's shop on 5 November 2026. The 1 Channel kit was sold out; the 2 Channel kit was in stock.