Comment by enragedcacti

Home Assistant has air quality integrations although it does seem most solutions require a whole lot of hacking regardless of the sensor you choose and you would have to leave the air purifier on and use a smart plug to trigger it.

An easier option is just forking over the cash for the Starkvind, which does exactly what you want and optionally comes in the form of a coffee table.

https://www.ikea.com/us/en/p/starkvind-air-purifier-white-00...