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Air Purifiers · Comparison

Levoit Core 400S vs Honeywell HPA300

This isn't a better-versus-worse comparison — the Levoit is our overall #1 for its low running cost and noise, while the Honeywell ranks last on our formula yet documents the highest smoke CADR under $250 of the four we cover. The real question is whether you're solving for everyday use or one specific smoke event.

Last updated 2026-07-29.

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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 · Honeywell Honeywell HPA3007.8/10$249Best for smoke

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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

Honeywell

Number 2: 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

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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

The real question: everyday use or wildfire smoke?

The Levoit Core 400S wins on almost everything that matters for daily use: a single combined filter keeps running cost near the bottom of the category, and its 24 dB on the lowest setting makes it quiet enough to sleep beside. For a bedroom or normal living room, it's the more sensible buy of the two.

The Honeywell HPA300 exists for one specific situation: nothing in our ranking clears smoke as fast. The cost is a pre-filter that needs replacing every 3-4 months on top of the annual HEPA, over 100W of power draw at full speed, and the loudest unit in the lineup. Buy it if you face wildfire season; buy the Levoit for everything else.

How we rank

Picksights Score is a weighted average of 4 criteria, the same as in the full air purifier ranking:

  • Clean air delivery (CADR) — 35%
  • Running cost — 25%
  • Price — 25%
  • Noise — 15%

Full ranking: Best Air Purifier →

Guide: Best for Wildfire Smoke →

Also see: Coway Airmega 400 vs Honeywell HPA300 →