Get insider access
Preferred store
Your browser is not supported or outdated so some features of the site might not be available.
We've recently launched Air Purifiers! Read our R&D Article to learn more.

Levoit Core 400S Air Purifier Review

Tested using Methodology v1.0
Reviewed May 13, 2024 at 01:24 pm
Levoit Core 400S Picture
8.4
Pets
7.9
Bedroom
8.7
Air Purification

​The Levoit Core 400S is a mid-range air purifier with a three-stage filtration system. It's larger than the Levoit Core 300S and uses a more powerful motor. It boasts a similar range of automation features, with a built-in air quality sensor, smartphone app integration, and compatibility with Amazon Alexa and Google Assistant devices, allowing you to change settings with voice commands.

Our Verdict

8.4 Pets

The Levoit 400S air purifier is an excellent fit for pet owners. It's effective in trapping finer particles like pet dander, and you can use its companion app to have it run while you're away from home. That being said, it's a little louder than some alternatives, with a somewhat higher-pitched tone than other Levoit Core models, which is far from ideal if your pet is sensitive to louder noises.

Pros
  • Wide assortment of convenience features.
  • Excellent overall filtration performance.
  • Companion app integration.
Cons
  • Noisy at higher fan speeds.
  • Somewhat large footprint.
7.9 Bedroom

The Levoit 400S is very good for bedrooms. It features a 'Display Off' function, so there are no bright lights you need to cover. While it's a little loud at higher fan speeds, with a slightly higher-pitched tone than alternatives, it's thankfully much quieter at lower speeds. It also offers amazing overall filtration performance. It's fairly large, and you can't rest it on a shelf or dresser.

Pros
  • Wide assortment of convenience features.
  • Excellent overall filtration performance.
  • Display light shutoff.
  • Companion app integration.
Cons
  • Noisy at higher fan speeds.
  • Somewhat large footprint.
8.7 Air Purification

The Levoit Core 400S is an excellent overall air purifier. It's a little loud, especially at higher fan speeds, but it's capable of cleaning relatively large areas pretty quickly and does a great job of trapping finer airborne particles. It also offers a wide range of smart features, including an air quality sensor, companion app integration, and compatibility with voice commands.

Pros
  • Wide assortment of convenience features.
  • Excellent overall filtration performance.
  • Companion app integration.
Cons
  • Noisy at higher fan speeds.
  • Somewhat large footprint.
  • 8.4 Pets
  • 7.9 Bedroom

Performance Usages

  • 8.7 Air Purification
  1. Updated Apr 23, 2024: Review published.

Differences Between Sizes And Variants

This air purifier is available in three color variants: 'Black,' 'Gray,' and 'White.' We tested the 'Black' model.

Let us know in the comments if you come across another variant.

Compared To Other Air Purifiers

This is a mid-range air purifier with a three-stage filtration system. The Core 400S is a better option than the cheaper Levoit Core 300S in most ways; while it has a much bigger overall footprint, it's far more effective in larger areas and boasts a similar range of convenience features. Its somewhat high-pitched operating noise can be annoying, especially when running the device at higher fan speeds.

Levoit Vital 200S

The Levoit Core 400S and Levoit Vital 200S are somewhat evenly matched machines, though we'd give the edge to the Vital 200S for most uses. Both machines deliver near-identical air purification performance and have similar smart features, but only the Vital 200S has a washable pre-filter and a U-shaped air inlet that's intended to resist clogs from pet hair.

Test Results

perceptual testing image
Design
Design
Body
Height 20.5" (52.1 cm)
Width 11.0" (28.0 cm)
Depth 11.0" (28.0 cm)
Weight
10.5 lbs (4.8 kg)
Power Cord Length 75.8" (192.5 cm)
Wheels
No
Design
Display And Control
Filter Change Indicator
Yes
Air Quality Sensor Auto Mode
Yes
Remote Control
No
App
Yes
Display On/Off
Yes
Timer Function
Yes
Number Of Fan Speeds
5

The ring of lights around the power button changes color based on current air quality:

  • Blue: Very good
  • Green: Good
  • Yellow: Moderate
  • Red: Bad

Tapping the 'Display Off' button turns off all of the device's indicator lights and the night light. On that subject, the night light features two levels of brightness.

The VeSync companion app also allows you to remotely adjust the fan speed, set operating schedules, and send filter replacement reminders. It also can be used to view a real-time estimate of air quality.

Design
Filter Configuration
Filtration Layers
3 Stage
Activated Carbon
Pellets

This air purifier has a three-stage filter system comprised of a pre-filter for trapping larger airborne particles, an H13 True HEPA filter for dust and mold, and an Activated Carbon filter for minimizing odors. You'll only need to clean the pre-filter with a soft-bristle dusting brush or a vacuum every two to four weeks, but make sure not to damage any other parts of the filter system when doing so.

You'll need to replace this filter assembly every six to eight months, and you can find a replacement here.

Performance
8.7
Performance
Particle Filtration
Air Cleaning Rate
656 m³/Hour
Average Final 0.3 µm Concentration
51 particles/L
7.4
Performance
Noise
Noise @ Lowest Fan Speed
33.7dBA
Noise @ Highest Fan Speed
58.7dBA