You also have this option 
Vesync app and a Levoit air purifier are one possibilities like Ric said. Used that one for a long time.
Ikea Starkvind is likely the best one that links directly to openhab. Check zigbee2mqtt to understand the information it provides.
Don’t forget the XIaomi ones with the MI binding too. They are quite good, but having DRM on the filters irks me.
Or get a dumdumb air purifier like the rectangle one from IKEA and use a smart socket to turn it on and off.
For sensors you can use ad hoc ones, placed somewhere else. Ikea has a zigbee one.
Some of options abound 