Drayton Wiser radiator boost: the twist top changes the room by 2 C
The Wiser radiator thermostat twist top applies a two-degree local boost. It changes one room temporarily and does not rewrite that room's schedule.
What this means
Twisting the Wiser radiator thermostat top applies a local two-degree boost in the warmer or cooler direction. It is a temporary room-level override; the schedule remains the baseline that resumes after the boost period or cancellation.
Equipment and model context
Drayton Wiser radiator thermostats connected through a Wiser Hub
- Wiser Radiator Thermostat
- Wiser Hub and HubR systems using room-by-room control
The two-degree twist-top behavior is published for the Wiser radiator thermostat in Drayton's current data sheet. App options and boost duration can vary with software and hub generation.
What this guide covers
- One room target changes after the valve head is twisted while the rest of the Wiser schedule remains unchanged.
What changes the answer
- The radiator thermostat provides a physical local override for a room without requiring the app.
- Room-by-room control means a boost can create heat demand through the Hub even when other rooms are at target.
The valve head raises its room target, the Hub compares that request with measured temperature, and the heating relay can respond without changing schedules in other rooms.
- Twist topApplies the two-degree local change
- Room targetTemporary setpoint exceeds measured temperature
- Wiser HubCombines room demands
- Heating outputCalls the installed boiler path
| Control action | Scope | Persistence |
|---|---|---|
| Twist-top boost | The radiator thermostat's room | Temporary override |
| App boost | Selected room and chosen duration | Temporary override |
| Schedule edit | Selected room's future time blocks | Persists until edited again |
| Open-window detection | Room where a temperature drop is detected | Pauses heat under the feature logic |
A room boost can legitimately call the boiler
Wiser radiator thermostats connect room demand to the Hub. If one room is boosted above its measured temperature, the Hub can create a heating call even though the main room thermostat and every other room appear satisfied. The flame icon records that demand, not proof that the burner has fired.
Check the boosted room name and target in the app, then compare the Hub heating indication. A room assigned incorrectly can make the demand look as though it came from another radiator. Cancel the boost rather than lowering the permanent schedule to test that relationship.
Use the opposite twist only when the data sheet and device feedback make its effect clear. The spring-back top is an input, not a position indicator. Confirm the resulting target in the app or room display instead of judging the request from where the top rests.
Local boost and open-window detection can pull in opposite directions
Drayton lists open-window detection as a separate radiator-thermostat feature. A sudden room-temperature drop can pause heating while a person has just asked for a boost, which makes the setpoint change visible without immediate valve heat. Check the room status before assuming the head failed to respond.
The thermostat head is battery powered, but the Hub and boiler path include mains wiring. Battery replacement and a normal twist are owner controls. Valve-body leakage, a stuck pin, Hub wiring, or a relay that switches without boiler response belongs to heating or electrical service.
Questions people ask about this
How much does a Wiser radiator twist boost change temperature?
Drayton's radiator-thermostat data sheet states that the twist-top design boosts the local setting by two degrees.
Does a Wiser boost replace the room schedule?
No. It is a temporary override. Editing the scheduled time blocks is a separate app action.
Can one boosted Wiser radiator start the boiler?
Yes. A room-level demand can pass through the Hub and call for heat even when other rooms do not need it.
Evidence recordHow this page was checked
official manufacturer support article · checked 2026-09-03
Every technical claim above was written from primary documentation held in the HVAC Bench evidence record: Drayton Controls and Schneider Electric technical literature. Where a source limits a definition to certain models, test conditions, or product classes, that limit is repeated here rather than generalised.
- Documentation class
- official manufacturer support article
- Scope of the definition
- Drayton Wiser radiator thermostats connected through a Wiser Hub
- Last checked
- 2026-09-03