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Air Purifiers

Best air purifier

CADR is AHAM-verified, which makes it one of the few performance figures in consumer appliances that is genuinely comparable between brands. We weight it most heavily, then what the machine costs to run — because over a few years that gap is larger than any price difference on this page.

Updated 2026-07-292 min read

The short answer

Size the machine to the room before you compare anything else. The EPA guideline is a CADR of at least two-thirds of your floor area, and most purchases fail that test on day one. For a bedroom or a normal living room the Levoit Core 400S takes it — one combined filter keeps the running cost near the bottom of a category where Consumer Reports measures a spread from about $65 to $259 a year. Buy the Coway Airmega 400 only for genuinely open-plan space, and the Honeywell HPA300 if you face wildfire smoke.

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Top pick

Levoit Core 400S

PS8.7/10$189

Best value

Coway Airmega AP-1512HH Mighty

PS8.6/10$150

Premium pick

Coway Airmega 400

PS8.2/10$350

Quick comparison

Ranked by Picksights Score. Prices are approximate and change frequently.
ProductPicksights ScoreFromBest for
#1 · Levoit Levoit Core 400S8.7/10$189Best for most rooms
#2 · Coway Coway Airmega AP-1512HH Mighty8.6/10$150Best value
#3 · Coway Coway Airmega 4008.2/10$350Best for large rooms
#4 · Honeywell Honeywell HPA3007.8/10$249Best for smoke

Swipe the table sideways to see every column.

Top pick

Levoit

Number 1: Levoit Core 400S

PS8.7/10

Best for most rooms

The right default for a bedroom or a normal living room, and the reason is the filter design rather than the airflow. One combined cartridge every six months keeps the running cost near the bottom of the category, and Consumer Reports' own testing shows that number varying by hundreds of dollars a year between machines. It is quiet enough to sleep next to. If you are buying for wildfire smoke or a large open-plan floor, buy more CADR instead.

Pros

  • One combined filter instead of two, which is why its running cost sits at the low end of the category
  • 24 dB on low — quiet enough that you will forget it is on
  • AHAM-verified CADR, so the performance figure is comparable rather than a marketing claim

Cons

  • Lower raw CADR than the Honeywell here, which matters during smoke events
  • Covers 403 sq ft, so it is undersized for a large open-plan space
  • Filters are proprietary, as with every purifier — factor that in for the life of the machine

From $189Approximate — prices change

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Sources: Consumer Reports air purifier buying guide (2026-06-04) · The Home Picker in-home comparison (2026-06-12)Last checked by Picksights 2026-07-29

Coway

Number 2: Coway Airmega AP-1512HH Mighty

PS8.6/10

Best value

The one to buy if you want the running cost as low as it goes. Its permanent washable pre-filter takes an entire consumable off the bill — Consumer Reports notes that carbon pre-filters alone can cost up to $50 every three months on other machines — and it is the cheapest unit here to begin with. The trade is coverage and smart features: at 233 CADR it is a bedroom machine, not a living-room-and-kitchen machine.

Pros

  • The washable permanent pre-filter removes a consumable that costs up to $50 a time on rival machines
  • The cheapest machine here and the longest-proven — it has been on sale for over a decade
  • The ionizer can be switched off, which matters because ozone-producing modes are not recommended

Cons

  • 233 CADR limits it to around 361 sq ft — undersized for open-plan living
  • No Wi-Fi or app control at this price
  • Design is dated next to newer rivals

From $150Approximate — prices change

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Sources: Consumer Reports air purifier buying guide (2026-06-04) · The Home Picker in-home comparison (2026-06-12)Last checked by Picksights 2026-07-29

Coway

Number 3: Coway Airmega 400

PS8.2/10

Best for large rooms

Buy this only if you have measured your room and the smaller machines do not cover it. The EPA guideline is a CADR of at least two-thirds of the floor area, and on that basis this is the only unit here that serves a genuinely open-plan space. In a bedroom it is an expensive way to buy airflow you cannot use, and its running cost is higher than the Levoit's. Size the machine to the room first; everything else is secondary.

Pros

  • The only machine here with the airflow to actually serve an open-plan floor rather than one room
  • Quiet on low despite moving far more air than the rest of this ranking
  • Washable pre-filter, as across the Coway line

Cons

  • $350 is more than double the Mighty for a machine most homes do not need
  • Middle-of-pack energy efficiency, so the running cost is above the Levoit
  • Physically large — this is a piece of furniture, not an appliance you hide

From $350Approximate — prices change

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Sources: The Home Picker in-home comparison (2026-06-12) · Consumer Reports air purifier buying guide (2026-06-04)Last checked by Picksights 2026-07-29

Honeywell

Number 4: Honeywell HPA300

PS7.8/10

Best for smoke

Our formula ranks it last and it is still the machine to buy for one specific situation. Nothing else here clears smoke as fast, which during a wildfire season is the only figure that matters. What drags it down is what happens the other fifty weeks: two consumables instead of one, over 100W at full tilt and real noise. Buy it if you have smoke events; buy the Levoit if you have a bedroom.

Pros

  • The highest smoke CADR under $250 — it clears a room faster than anything else here
  • Long-standing recommendations from allergy organisations
  • Certified True HEPA at 99.97% of particles at 0.3 microns

Cons

  • A separate pre-filter every three to four months on top of the annual HEPA — two consumables instead of one
  • Over 100W at full speed, notably more power-hungry than newer machines
  • The loudest unit in this ranking, and it has no app or smart controls

From $249Approximate — prices change

See current price(opens in a new tab)

Sources: Consumer Reports (laboratory testing, annual running-cost estimates) (2026-07) · Consumer Reports air purifier buying guide (2026-06-04)Last checked by Picksights 2026-07-29

How we rank

Picksights methodology

Clean air delivery

35% of score

Running cost

25% of score

Price

25% of score

Noise

15% of score

Frequently asked questions

What is CADR, and why do we weight it so heavily?

CADR (Clean Air Delivery Rate) measures how much clean air a purifier produces per minute, and AHAM verifies it independently — which makes it one of the few performance figures in consumer appliances that's genuinely comparable between brands, unlike suction wattage or "m³/h" figures every manufacturer measures its own way.

How do I size an air purifier to my room?

The EPA guideline is a CADR of at least two-thirds of your room's square footage. For a 300 sq ft bedroom you need at least 200 CADR; the Levoit Core 400S (260 CADR, 403 sq ft) clears that with room to spare. For an open-plan space over 1,000 sq ft, only the Coway Airmega 400 (350 CADR, 1,560 sq ft) on this list is genuinely sized for the job.

Is the most expensive purifier always the best one?

No. The Honeywell HPA300 ranks last in our overall formula because it has the highest running cost and is the loudest of the four, but it clears smoke fastest — the one figure that matters during a wildfire event. Purchase price is the smallest part of what you'll pay for this machine over its life.

How much does an air purifier actually cost to run per year?

Consumer Reports measures a spread of roughly $65 to $259 a year across the machines it tests, and filter design is the reason why. A permanent washable pre-filter (Coway AP-1512HH) removes a consumable entirely; a single combined filter (Levoit Core 400S) simplifies upkeep; two separate consumables replaced on different schedules (Honeywell HPA300) add up to more per year than any of the other three machines here.

Do I specifically need HEPA H13?

Only if allergies or pet dander are your priority — in that case filter certification matters more than raw CADR. We have a dedicated comparison built around exactly that criterion.

Which one should I buy if I'm worried about wildfire smoke?

The Honeywell HPA300, without hesitation — it has the highest smoke CADR under $250 of the four we cover, even though our overall formula ranks it last on running cost and noise.

What this ranking does not cover yet

Four machines from three manufacturers, all sized for rooms rather than whole homes. We do not yet cover whole-house or medical-grade filtration, and we will not stretch this ranking to pretend we do — those are different decisions with different evidence behind them.

Allergies or pet dander? Here's the criterion that matters most to you →

Related guides and comparisons

GuideAir Purifier Buying GuideGuideBest for Allergies and Pet DanderGuideBest for Wildfire SmokeGuideBest for Large RoomsGuideHEPA vs Carbon FiltersHead-to-headLevoit Core 400S vs Coway Airmega AP-1512HHHead-to-headCoway Airmega 400 vs Honeywell HPA300Head-to-headLevoit Core 400S vs Honeywell HPA300

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