Air Purifiers · Comparison

Levoit Core 400S vs Coway Airmega AP-1512HH Mighty

Similar prices ($189 vs $150) and, on our own data, each other's most direct rival. The Core 400S wins on raw CADR (260 vs 233 CFM) and on noise (24 dB on its lowest setting, versus a Mighty that's merely "quiet, not the quietest here"). The Mighty wins on running cost, because its pre-filter is permanent and washable rather than a consumable, and it's cheaper to begin with.

Last updated 2026-07-29.

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Quick comparison

Ranked by Picksights Score. Prices are approximate and change frequently.
Product	Picksights Score	From	Best for
#1 · Levoit Levoit Core 400S	8.7/10	$189	Best for most rooms
#2 · Coway Coway Airmega AP-1512HH Mighty	8.6/10	$150	Best value

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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

See current price

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

See current price

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

The real question: does airflow or long-term cost matter more?

The Core 400S covers 403 sq ft against the Mighty's 361 sq ft, and its single combined HEPA-and-carbon filter, replaced every six months for around $20, already keeps its running cost near the bottom of the category. But the Mighty goes a step further: its pre-filter is permanent and washable, taking an entire consumable off the bill — one that costs up to $50 a time on other machines, per Consumer Reports.

If your priority is the most coverage from the quietest machine, the Core 400S is the pick; if you'd rather minimize what you spend year after year and pay less up front, the Mighty is the pick, even though it covers slightly less floor area.

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%
Noise level — 15%
Price-to-value — 25%

Full ranking: Best Air Purifier →

In depth: Full Levoit Core 400S review →

In depth: Full Coway Airmega AP-1512HH review →

Also see: Coway Airmega 400 vs Honeywell HPA300 →