> 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:

![](https://1587494504-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-Ltn3vQOSB-YGC6qLZu_%2F-Ltp9ACp6_sdPj0LB3zL%2F-Ltp9MCa6VKorF7TPG7x%2FSkjermbilde%202019-11-16%20kl.%2018.01.18.png?alt=media\&token=03b88ec3-a744-4680-8e7e-2b06da1c95a7)