How good can air purifiers be in regards to toxins? For example, if I accidentally burn a few pounds worth of plastics, accidentally release some Clorine gas, and accidentally mix two dangerous chemicals, and cause massive amounts of super toxic gasses and chemicals to be released, is there any air purifier that, regardless of how toxic the toxins are, or what they are, will clean the air to the point of being safe to re-enter this hypothetical air tight room?