is it possible that ozone can naturally be occurring in a room?
recently, at certain times I can smell ozone in my bedroom, just for a few second. I don’t have air purifier, ozonizer or ionizer. I live in tropical climate and I open my window when it’s hot in the room, rarely use air conditioner. (the smell only occur when the all windows are closed). It really puzzled me from where the ozone smell possibly comes from.
Ozone is produced by Nature (waterfalls, lightning, "ozone layer", and more). Ozone is produced by electrical wiring. Ozone is produced by fluorescent lights. Ozone is produced by violet and more energetic light striking combustion products (the light doesn’t have to come from the Sun). My dog smells strongly of ozone when he comes in from outside.
Our noses are very poor at distinguishing ozone from other chemicals. I suspect you aren’t smelling ozone, but something else. If it were ozone, your nose gets numbed to the smell of ozone fairly quickly…