Popular Science best air purifiers for smoke
Popular Science named the Mod air purifier the best filter change system in its 2024 smoke air purifier roundup.

For wildfire smoke, choose an air purifier whose smoke CADR is at least two-thirds of your room's floor area in square feet, then run it continuously while outdoor air quality is poor. Wildfire smoke is mostly PM2.5, which pleated HEPA media captures. Every purifier on this page carries an AHAM-certified smoke CADR.
Free Shipping: US lower 48
Free Shipping: US lower 48
Free Shipping: US lower 48
Free Shipping: US lower 48
Free Shipping: US lower 48

Our AirMend HEPA air purifiers provide PM2.5 filtration. This is what you need to breathe easier in wildfire smoke. The HEPA filter captures the smallest smoke particles to keep your air clean.
It's important to choose an air purifier that has enough air flow for your room size. We supply CADR ratings for every HEPA air cleaner. Verified performance by AHAM.
If your main concern is wildfire smoke smell, then it's best to have both HEPA and carbon in your home. This filtration will attack fine particles, VOCs, and odors. It will create a clean, healthy indoor environment. It will have the best air cleaning for those concerns.
Our TrueCarbon air purifiers contain packed activated carbon filters. See lab tests below to see performance in removing odors and VOCs. For cigarette, cigar and cooking smoke rather than wildfire smoke, see our air purifiers for smoke.
See every independent review of an Oransi air purifier, including the criticisms.
Size by smoke CADR. AHAM's guidance is a smoke CADR at least two-thirds of the room's floor area in square feet, so a 300 square foot room needs a smoke CADR of 200 or higher. In heavy smoke, size up. A higher CADR clears the room faster, which matters when the air outside stays bad for days.
Enter your room size to calculate the required Clean Air Delivery Rate (CADR) for wildfire smoke and get a model recommendation.
Stop the smoke getting in before you try to clean it up. Close windows and doors, set your HVAC system to recirculate so it stops pulling outdoor air through the fresh-air intake, and put the highest-rated filter your system accepts in the furnace. Weatherstrip the doors that leak.
Then pick one room to keep clean, usually a bedroom and run an air purifier in it continuously. A smaller sealed room reaches clean air faster than the whole house, and it gives you somewhere to sleep while the smoke lasts.
While the air is bad, avoid adding to it indoors. Burning candles, frying, and vacuuming without a sealed HEPA vacuum all push more fine particles into the air you are trying to clean.
Run it continuously, not in bursts. Wildfire smoke keeps entering the house
through gaps while outdoor levels stay high, so a purifier that is switched off loses the ground it gained within an hour or two. Leave it on the highest speed you can tolerate while you are awake, and a lower speed overnight.
Keep running it for a day or two after the outdoor air clears. Fine particles that settled on surfaces get stirred back into the air as the house returns to normal use.
Run an air purifier sized to the room and keep it running. Wildfire smoke is mostly PM2.5. These are particles small enough to reach deep into the lungs, plus gases and odor compounds. Pleated HEPA media captures the particles; activated carbon handles the gases and the smell. Match the smoke CADR to at least two-thirds of the room's square footage.
A pleated HEPA filter, because the particle fraction is what carries the health risk. Add activated carbon for the gases and the smoke smell that HEPA media passes through. Every purifier on this page carries an AHAM-certified smoke CADR, which is the figure to compare across brands.
Compare four figures: the AHAM-certified smoke CADR against your room's square footage, the noise level in decibels at the speed you will actually run, ENERGY STAR certification for running cost, and the price and life of the replacement filters. Pre-filters and activated carbon stages add odor and gas removal beyond what HEPA media does.