Purifiers · monitors · masks · filters · plants
Air purifiers, air quality monitors, N95 masks, genuine filters and easy plants, each picked on a figure someone else verified.
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Air purifiers
HEPA purifiers sized by room, from a bedroom to an open-plan living room.
Best overallCoway
Named a top pick by Wirecutter year after year: quiet, efficient and simple, with an air-quality light and auto mode. The one we'd buy first for most rooms.
It has an ioniser you can switch off. The HEPA filter does the cleaning.
$239.99at cowaymega.com
Smart MightyCoway
The Mighty with Wi-Fi: the same 233 cfm of clean air, plus Coway's IoCare app, Alexa and Google, and a washable pre-filter.
$299.99at cowaymega.com
Budget bedroomLevoit
A compact, simple HEPA purifier for a bedroom or study, with a carbon layer for smells and a sleep mode quiet enough to leave on overnight.
$89.99at levoit.com · sale price, was $99.99
Air monitors
See the PM2.5 and CO₂ inside, and whether your purifier is keeping up.
Best overallQingping
PM2.5, CO₂ and five other readings on a sharp 4-inch touch screen, with history in the Qingping+ app over Wi-Fi.
Its eTVOC figure shows a trend, not a measured amount, and PM10 is worked out from the same particle sensor.
$149.99at qingping.co
Fresh-air checkAranet
An accurate CO₂ meter that tells you when a shut room needs fresh air: the trade-off to watch while you keep smog out.
It doesn't measure particles (PM2.5).
$189.00at aranet.com
Radon tooAirthings
Seven sensors including radon, the radioactive gas from the ground that the US EPA names as the second leading cause of lung cancer.
$329.99at airthings.com
Masks
NIOSH-approved N95s and a reusable P100, for days you have to be out.
Most comfortable3M
A NIOSH-approved N95 that folds flat for a pocket, with three panels that shape around the nose and chin, and less fogging for glasses.
Fit matters more than the brand: no gaps at the cheeks, and no mask seals over a beard.
$24.45at zoro.com · pack of 10
Family packs3M
The classic cup-shaped N95, sold in packs of 20: the cheapest certified protection for a household.
Fit matters more than the brand: no gaps at the cheeks, and no mask seals over a beard.
$25.29at zoro.com · pack of 20
Reusable3M
A reusable silicone respirator that seals far better than a disposable mask. Fit it with 2091 or 2097 P100 filters for heavy smog.
It comes without filters: add the 2091 or 2097. No mask seals over a beard.
$30.15at zoro.com · medium, no filters
Filters
The makers' own filters for every purifier here, with how often to change them.
Core 300 & 300SLevoit
Levoit's own three-stage filter for the Core 300 and Core 300S: a fine pre-filter, H13 True HEPA and activated carbon in one cylinder.
Copies sell under the same part number. Levoit's figures are for its own filter.
$29.99at levoit.com
Core 400SLevoit
Levoit's own three-stage filter for the Core 400S: pre-filter, H13 True HEPA and activated carbon.
Copies sell under the same part number. Levoit's figures are for its own filter.
$49.99at levoit.com
Core 600SLevoit
Levoit's own filter for the Core 600S. Levoit says the purifier's filter-life indicator works only with its genuine filters.
Levoit says the filter-life indicator works only with its genuine filters.
$59.99at levoit.com
Hard to killCosta Farms
Stiff, upright leaves that put up with low light and missed waterings: the easiest houseplant there is.
Toxic to cats and dogs if chewed (ASPCA).
$35.00at costafarms.com · small size
TrailingCosta Farms
Fast trailing vines with gold-splashed leaves for shelves and window ledges. A cutting roots in a glass of water.
Toxic to cats and dogs if chewed (ASPCA).
$34.00at costafarms.com · small size
Low lightCosta Farms
Glossy, dark leaves that look polished and need almost nothing: water every couple of weeks and keep it out of hot sun.
Contains calcium oxalate crystals, which irritate the mouth if chewed. Keep away from pets and small children.
$39.00at costafarms.com · medium size
Can't decide?
How we pick
Listed by the smoke CADR on the AHAM label: tested by an independent lab, not taken from the box.
A laser particle counter for PM2.5 and NDIR for CO₂, the sensor types that track real changes.
Only N95 and P100 respirators carrying US NIOSH approval. No "N95-style" lookalikes.
The makers' own replacements, with the models each fits. No copies under borrowed part numbers.
Chosen for being easy to keep, with the ASPCA's pet-safety note. Never sold as air cleaners.
Questions