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Ozone can mask smoke odor by chemically altering it, but ozone itself is a lung irritant the EPA explicitly warns against indoors

Retrieved 2026-02-18

And although the 511 is a very basic machine, with no smart functionality and no auto setting that self-adjusts the fan speed when the air quality changes, we prefer it over the newer member of the 511 line, the 511i Max, which we tested in February 2025

Unflavored blends are offered in what they call Blue, Deluxe and Special Blue is the mildest blend, Deluxe is a medium blend, and Special is their strongest blend

One thats too strong can feel harsh and unpleasant