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If there are particles released by cigarette smoke that are too small to be captured by a HEPA filter, negative ions serve as another line of defence

Unlike other air purifiers, this unit releases a sound that mirrors soothing rainfall

Cleans Large Rooms Best Seller Mod Jr

A qualifying unit needs at least one of three things: a substantial activated carbon load for gas and odor capture, medical-grade HEPA particle filtration, or alternative particle capture (such as electrostatic plates) rated for ultrafine particles below 0.3 microns

We prefer the large color-coded rings (visible across the room and from any direction) found on some air purifiers to the tiny light (around 1 inch) on the Blueair Pure Pure 211i Max

A unit with 200 CADR and 5 lbs of pelleted carbon will out-deodorize a 400 CADR unit with a thin carbon mat every single time. Jason Miller, lead reviewer, AirPurifier.guru What to Look For: Specs That Actually Matter To tell a real smoke-eater from a weak imitation, you need to check the specs