> For the complete documentation index, see [llms.txt](https://docs.myrspoven.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.myrspoven.com/ai-features/draught-control.md).

# Draught control

Draught control is a myCoreAI feature that prevents perimeter discomfort from cold air falling along windows and façades — *kallras* in Swedish — during cold-weather office hours. myCoreAI raises the lower bound on heating-circuit supply temperatures so radiator water stays warm enough to offset the downdraught, even when room temperature is already on target.

## Trigger conditions

myCoreAI activates draught control when both conditions hold:

* **Time of day:** 07:00–17:00 (building local time)
* **Outdoor temperature:** below 5 °C

Outside these conditions, the bounds produced by other pipeline steps are left unchanged.

## Effect

myCoreAI raises the lower bound of every heating-circuit supply-temperature setpoint by **15% of that signal's configured min–max range**.

| Configured range   | Lower-bound uplift |
| ------------------ | ------------------ |
| 15–70 °C (typical) | \~8 °C             |

The upper bound is untouched. myCoreAI can still push the setpoint higher when heat demand warrants it — only the floor moves up.

## Position in the bounds pipeline

Draught control is one step in the sequence of bound adjustments myCoreAI applies before each optimization run. It only tightens the lower bound upward; it never widens it. If an earlier step has already pushed the lower bound above the draught-corrected level, draught control has no further effect at that timestep.

## Scope

Draught control acts on heating-circuit supply temperatures only. myCoreAI does not modify the following signals through this feature:

* Air-handling-unit supply-air setpoints
* Zone-asset schedules
* Indoor temperature targets configured per climate group


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