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Thank you for your inquiry. This unit does not carry a MERV rating, as MERV ratings are only for Whole House air purifiers, not portable units. This air purifier is a True HEPA air purifier, and rated to remove 99.97% of particles as small as 0.3 microns in size and larger. If you have any other questions please do not hesitate to contact our consumer relations team by emailing us at SocialSupport@helenoftroy.com. Thank you.
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