[seltzered_]

Veritasium had a good video showing the test of ozone being produced by air ionisers: https://youtu.be/ZQ--scjcAZ4?t=663

(time-linking since the ioniser part was sortof hidden within a video debunking himalayan salt lamps)

[pergadad]

Thank you, really enlightening video. I'm happy I bought a HEPA filter now, rather than an ioniser.