Levoit Core 400S Review 2026: Air Purifier

Item: Levoit Core 400S
Rating: 9.2
Author: PawTech Review

Score Breakdown

Filtration

9.5

Pet Odor

8.8

Noise Level

9.6

Smart Features

9.2

Value

9.0

Our Verdict

The Levoit Core 400S earns the top spot because it covers the largest room area of any purifier in this price range — 1,733 sq ft — while running at just 24 dB in sleep mode. The H13 HEPA filter captures 99.97% of particles including pet dander and fine hair, and the 3-in-1 filter system adds activated carbon for odor absorption. Smart WiFi with the VeSync app lets you monitor air quality, set schedules, and check filter life remotely. For pet owners who want one purifier to handle a large living space, this is the best balance of performance, coverage, and price.

Pros & Cons

Pros

Largest room coverage at this price point (1,733 sq ft)
Whisper-quiet 24 dB sleep mode
Smart WiFi with air quality monitoring and scheduling
H13 HEPA captures 99.97% of pet dander particles
Auto mode adjusts fan speed based on air quality readings

Cons

Carbon filter layer thinner than dedicated odor models
No washable pre-filter — full filter replacement needed
VeSync app has occasional connectivity hiccups

Frequently Asked Questions

How often do you replace the Levoit Core 400S filter?

Levoit recommends replacing the H13 HEPA filter every 6-8 months. In pet-heavy homes, every 4-6 months. Replacement filters cost approximately $30-40.

Is the Levoit Core 400S quiet enough for a bedroom?

Yes. It operates as low as 24 dB in sleep mode, quieter than a whisper.

Does the Levoit Core 400S remove pet odors?

Yes. It uses H13 HEPA filtration for dander and activated carbon for odor absorption.