[Zardoz84]

I would say that there are electronic schemes and plans to build DIY ion air cleaners. They works nice to remove dust or tabacoo from air.

Also, ozone air purifier make wonders to keep at bay smells and fats (wonderful to have on the kitchen), and kills bacterias, spores and fungus.

[qpiox]

Ozone is harmful.

[Zardoz84]

O3 isn't harmful in small quantity : https://en.wikipedia.org/wiki/Ozone#Consumers

Also, ozone purifiers not need to keep working all the time. A usual usage it's have a burst of ozone to sanitize a place, and wait a few minutes to decompose to O2. The result is that any smell is removed, and the ambient is sanitized. I saw this a lot on hotels where they use "ozone cannons" where they are cleaning rooms.

[unlinked_dll]

It also smells bad too

[regularfry]

That's very subjective - I quite like the smell.