> For the complete documentation index, see [llms.txt](https://homey.solweb.no/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://homey.solweb.no/aggregated-state/ventilation/co2.md).

# CO2

For each of the rooms where I measure CO2, I update an vent-co2-room logic boolean variable, to indicate whether the co2 level is too high.

Here is an example:

![](/files/-Ltp9MCa6VKorF7TPG7x)