Very informative posts, but I've come up with more questions:
1) I'm interested in buying a small Air Ozonator for my averaged sized bedroom (small). What should I like for in regards to Ozone Output (mg/h <> ppm)? What output would be effective and can you recommend several high quality models?
2) Also interested in buying a good Water/Olive Oil Ozonator, can you recommend several high quality brands? Cold Corona, Cold Plasma? What else should I look for in features and construction of the unit?
3) What are the differences between Medical-Grade and other Ozonators?