Purifier roundups

Researched from the AHAM AC-1 test method, EPA and CARB guidance, and published manufacturer specifications

Quick answer

There are 16 roundups here, split by room size and by what is actually in the air. Every one names a specific machine, a specific airflow figure and the replacement filter that machine takes, because over five years the filters frequently cost more than the machine.

A machine that suits most rooms

GermGuardian HEPA Air Purifier - Large Room Air Purifier for Bedroom, Office, Dorm, and Home - Filters Pet Dander, Dust, Pollen, Smoke, Scents - AC4825E - 22" Tower - Gray

A mid sized machine with a published specification, which is the position most households actually need before anything more specialised.

$80.74Check pricePrices change often

Check the airflow figure against your own room rather than the coverage area printed on the box.

Every roundup in this section

  • Three tiers

    Best air purifier for a basement

    A basement needs a dehumidifier before a purifier. The Midea 50 Pint with pump ($229.99) gets humidity under 60 percent first, then a carbon-equipped purifier handles the rest.

  • Three tiers

    Best air purifier for a whole house

    There is no portable unit that cleans a whole house. A Filtrete MERV 13 furnace filter ($36.99) or a Blueair 211i Max ($349.00) per room are the two honest paths.

  • Three tiers

    Best air purifiers

    The Coway AP-1512HH is the best all-around air purifier at $218.50, with a $23.99 filter that keeps five-year cost low. Picks for bedrooms, medium rooms and large rooms.

  • Three tiers

    Best air purifiers for a bedroom

    For a 100 to 250 sq ft bedroom, the Momcozy purifier ($99.99) hits 250 sq ft coverage with an auto mode that keeps it quiet at the speed you actually sleep next to.

  • Three tiers

    Best air purifiers for a large room

    For a 400 to 900 sq ft room, the Winix 5510 ($179.99) is rated to 1,881 sq ft, leaving real headroom for a genuine air change rate rather than a bare-minimum one.

  • Three tiers

    Best air purifiers for a small room

    For a desk, dorm room or nursery corner under 150 sq ft, the Pure Enrichment PureZone Mini ($39.99) delivers true HEPA and carbon filtration in a cordless footprint.

  • Three tiers

    Best air purifiers for mold spores

    True HEPA purifiers that capture airborne mold spores, and the honest limit: they do nothing about the moisture growing the mold in the first place.

  • Three tiers

    Best air purifiers for pet dander and odor

    Purifiers picked for washable pre-filters that stop pet hair from clogging the HEPA stage, plus real carbon for odor: dander is the airborne problem, not fur.

  • Three tiers

    Best air purifiers for pollen and dust mite allergies

    True HEPA purifiers sized to 4 to 5 air changes an hour for pollen and dust mite debris, with real CADR figures and no claims about symptom relief.

  • Three tiers

    Best air purifiers for VOCs and off-gassing

    For VOCs, carbon mass is what matters, not the HEPA rating. Most bundled carbon layers are thin, and ventilation beats filtration for off-gassing.

  • Three tiers

    Best air purifiers for wildfire and indoor smoke

    True HEPA purifiers sized for smoke, not allergies: real smoke CADR numbers, enough capacity to run at 6 air changes an hour, and honest coverage math.

  • Three tiers

    Best air purifiers under $100

    The MOOKA H13 ($46.98) is the cheapest air purifier that is actually cheap: a $17.98 filter keeps its five-year cost under $140, lower than every other unit in this price bracket.

  • Three tiers

    Best dehumidifiers for a basement

    Basement dehumidifiers picked for continuous drainage and cold-weather operation, with the 2019 DOE pint rating change explained so labels compare fairly.

  • Three tiers

    Best humidifiers for dry indoor air

    Humidifiers sized by output against room volume, not just tank size, with the cold-weather condensation ceiling explained before it fogs a window.

  • Three tiers

    Best indoor air quality monitors

    Monitors picked by sensor class: no device reads PM2.5, CO2, VOCs and radon equally well, and a cheap VOC sensor reports an index, not a real concentration.

  • Three tiers

    Best quiet air purifiers

    The DREO purifier ($69.97) is marketed at 20dB on its quietest setting, but that number is not the speed that delivers its rated 178 sq ft coverage.

Machines that come up most often

Common questions

How are these picks made?

From published manufacturer specifications, the capabilities each listing states outright, price positions and owner reports. Nothing here was tested in a chamber by us. Every product shown comes from a verified catalog of real listings, so no price, image or product on this site was invented or estimated.

Which roundup should I read first?

The one matching your room size if you know the square footage, and the one matching your problem if you know what is in the air. If you know neither, start with the sizing calculator: the airflow the room needs narrows the field faster than any list of machines can.

Why is the filter cost mentioned on every page?

Because it decides which machine is actually cheap. A unit bought once at a low price with a proprietary filter due twice a year can cost more over five years than a dearer machine with a cheap annual filter. The purchase price is the smaller half of the decision even though it feels like the whole of it.

Do these pages recommend ionizers?

No. Where a machine has an ionizing or plasma mode, the pages say it can be switched off and that the filtration is doing the work. Ozone generators are not recommended at any price, because ozone is harmful in occupied rooms and California's CARB regulates its emission from indoor air cleaning devices.

How often is this updated?

Prices and product listings are rebuilt from the live listings each time the site is published, so the figures on these pages match what the products cost when they were last built. Specifications change and listings get edited by their sellers, so check the listing before buying.

Related on this site