Air purifier for odors, cooking, and smoke.
HEPA is great for particles, but for gases/odors you need activated carbon or dedicated filters. The EPA indicates that CADR is for particles and that for gases, another type of filtration is needed (and there isn't such a standardized classification).
What to look for
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“activated carbon” with a good amount of material
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Filter seal (to prevent air from "escaping" through the sides)
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avoid solutions with "ozone" (this is not the home method)