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#6 of 9

Key Specs

Filtration

CADR (Smoke)

Coverage (brand claim)

Effective coverage (5 ACH)

Levoit

Levoit Core 400S

#6 of 9 air purifiers tested

No sponsored placements·By Renée Torres

6.7R3 Score / 10

There are better options - here's why.

No sponsored placements· By Renée Torres

Safety

The bottom line

What the product listing won't tell you

Know before you buy

The 403 sq ft coverage claim is based on weak air-change math — place this in a room under 300 sq ft, not a living room.

Buy it if

You want a bedroom or nursery purifier where sleep-mode silence matters

Efficacy

Usability

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$219.99

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We may earn a commission. It doesn't affect our scores.

Safe technology (no ozone, CARB certified) is a non-negotiable priority

You need AHAM-verified CADR numbers, not just marketing claims

Your budget is under $250 and you want a legitimate HEPA + granular carbon combo

Skip if

You need to cover a room larger than 300 sq ft effectively
You have significant chemical sensitivities and need confirmed carbon weight data
You want material transparency — Levoit doesn't disclose housing plastic specs

What's inside

Specs the product listing doesn't explain

Usability

Ease of use, maintenance, and longevity

Filtration CADR (Smoke)Coverage (brand claim)Effective coverage (5 ACH)CARB Certified Sleep Mode Noise Annual Filter Cost Price ASIN

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How we scored it

3 criteria - open any layer to see exactly what we found

Safety

Efficacy

Usability

SafetyCritical

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Criteria

Where to buy

Verified retailer - current pricing

Starting price

$219.99

R3 approved retailer Score unaffected by purchase

Buy on Amazon

We earn a small commission on purchases. It never influences our scores - R3 is funded by readers, not brands.

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#6 of 9 air purifiers reviewed

Did the Levoit Core 400S pass our safety screen?

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Filtration Technology

CARB Certified

Ionizer Control

Housing Material

Carbon Filter Quality

How Much Carbon

EfficacyImportant

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The scoring rationale is locked

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Criteria

HEPA Filter Grade Air Cleaning Speed Coverage vs. Claims

UsabilityNice to have

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The scoring rationale is locked

Free account unlocks exactly why this product scored the way it did.

See the full scoring for free

Criteria

Sleep Mode Noise Annual Filter Cost