Air Purifiers for Cigarette Smoke

For cigarette or cannabis smoke, choose a purifier with a high smoke CADR and the heaviest activated carbon filter you can find. HEPA captures the particles, and carbon reduces the odor, but no portable purifier removes all of tobacco smoke's gases, so it lowers smoke rather than eliminating it.

How to choose

• Carbon by weight: models listing several pounds of granular carbon outlast thin carbon sheets by a wide margin.
• Smoke CADR well above two-thirds of the room's area, because smoking is a continuous source rather than a one-off event.
• Budget for filters: heavy smoke can saturate carbon in a few months.
• Place the purifier between the smoking area and the rest of the room, a few feet from walls.
• Ventilate when you can. Opening a window or running an exhaust fan removes gases a filter misses.

For general smoke picks, see Air Purifiers for Smoke. For lingering smells in a whole room, compare Air Purifiers for Odors.

FAQs

Can an air purifier remove cigarette smoke?

A purifier with a true HEPA filter and plenty of activated carbon reduces cigarette smoke particles and much of the odor. It cannot remove all the gases in tobacco smoke, and the EPA notes that air cleaning is not a substitute for a smoke-free home. It works best combined with ventilation.

Do air purifiers work for weed smoke?

Yes, in the same way as for tobacco. HEPA captures the smoke particles and activated carbon adsorbs much of the smell. Choose a unit with a high smoke CADR and a thick carbon filter, run it on a higher setting while smoking, and expect to replace the carbon more often than the manual suggests.

How long does a carbon filter last with heavy smoke?

It varies with how much carbon the filter holds and how much smoke it handles. Thin carbon pre-filters may stop absorbing odor within weeks in a heavy-smoking home, while filters with several pounds of granular carbon can last months. When the smell returns at the same settings, the carbon is saturated.