Levoit Core 400S Review: Powerful air cleaning


Levoit’s Core 400S is a neat and highly effective air air purifier for pretty giant dwelling areas, with app management and good options thrown in. It doesn’t provide germicidal UV mild and its air pollution sensor is a bit primary, however total it strikes a very good stability between worth, options and efficiency.


  • Excessive-volume, environment friendly air purification
  • App managed with good options
  • PM2.5 air high quality sensor


  • No ultraviolet sterilisation
  • Dear filters

  • A HEPA 13 air air purifier for fairly massive roomsThis air air purifier is designed for giant areas as much as 83 sq. metres (890 sq. toes). Its HEPA 13 filter can take away pollen, mould spores and even viruses from the air

  • Sensible controlsUse the VeSync app to regulate settings, view air high quality historical past, create schedules and tweak different settings


Levoit’s 400S air air purifier is designed for comparatively giant rooms. It may possibly change the air in an 83 sq. metre (m2) area as much as twice per hour, which must be sufficient to maintain the air recent in a big kitchen/diner or open plan dwelling space. It’s geared up with a three-stage filter that may take away mud, allergens and even viruses, however there’s no ultraviolet mild for extra sterilisation.

This air air purifier has a built-in particulate sensor, so it might step up the fan velocity if the air high quality deteriorates – for instance since you’re grilling or frying within the kitchen. It additionally presents easy controls, enhanced by Wi-Fi connectivity and app assist, so you possibly can configure schedules and tweak a couple of different settings too.

Design and options

  • Pretty enticing design with good controls
  • Air high quality sensor
  • Helpful and dependable app

Should you’ve obtained a big room, you’ll want a big air air purifier. The Core 400S is definitely a step up, but it surely’s not large, developing solely barely greater than the common chair seat. Like many different air purifiers, its cylindrical design combines a big air enter and filter chamber within the base with a fan part on high. Levoit’s alternative of white and black plastics seems to be tasteful and fashionable, if maybe a bit businessy.

Front view of Core 400S
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In the course of this air purifier’s black air output there’s a round management panel, with a choice of buttons and indicators. At their centre you’ll discover a numeric show displaying the present studying from the Airsight Plus air high quality sensor. This solely detects PM2.5 particulates (these with a diameter of two.5 microns or much less), but it surely allows an auto mode, by which the Core 400S can step up its fan velocity if the air high quality declines.

Top panel view showing PM2.5 reading of 34Top panel view showing PM2.5 reading of 34
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There are 4 guide fan speeds, but in addition Evening Mode, by which the fan barely ticks over and the management panel lights are extinguished. You may as well use the management panel to set an off timer in one-hour increments as much as 12 hours, and there’s a lock perform to cease others messing round with it.

This can be a good system, nonetheless. Set up the VeSync app, use it to attach the Core 400S to your wi-fi community, and also you’ll have entry to extra options, knowledge and settings. Maybe most significantly, VeSync enables you to set schedules, so you possibly can configure the Core 400S to slot in with the occasions you’re prone to be dwelling.

Android screenshot from the VeSync appAndroid screenshot from the VeSync app
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The VeSync app reveals up further data, together with historic air cleanliness and fan speeds. You may as well use it to tweak the settings of Auto Mode, prioritising low noise, or tune it to the dimensions of the room the filter is in. At its lowest, the fan will swap to the barely-on velocity utilized in Evening Mode, however in contrast to the costlier Levoit Core 600S it received’t really cease, even when the air high quality is ideal.

Android screenshot from VeSync app, showing settings optionsAndroid screenshot from VeSync app, showing settings options
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Earlier than you should use this air air purifier you’ll must take away the plastic bag from its filter, which entails turning it the wrong way up and eradicating the bottom. Ideally you’ll additionally do that each few weeks to hoover off mud, which helps preserve the filter working optimally. Levoit doesn’t state a set filter life because it relies on your property and the way intensively you utilize the air purifier, but it surely says you possibly can count on replacements to final round 6-8 months. Which means you’re prone to change filters a couple of times a 12 months, and at greater than £60 a go that may very well be fairly an expense.

The large filter, removed from the Core 400SThe large filter, removed from the Core 400S
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  • Very quiet and environment friendly
  • Pretty good filtration efficiency
  • Reasonably highly effective air circulation

This air air purifier was fast to answer deteriorating air high quality, virtually instantly stepping up the fan velocity once I positioned a lit-match a couple of centimetres from its sensor. It carried out fairly strongly in our extra managed smoke check, the place I positioned the air purifier in a small room together with a smoke pellet that produces copious particulates for about 60 seconds. This check instantly sends an air air purifier’s air high quality meter off the size.

It took the Core 400S 5 minutes to come back down from its most 999μg/m3 studying, and an additional 4 minutes earlier than it returned to a average studying of 54 micrograms per cubic metre (μg/m3). After 10 minutes it reported good air high quality, and one minute later this had change into excellent, with an 8μg/m3 studying. This can be a first rate efficiency, but it surely’s a way wanting the extra highly effective Core 600S, which returned the air high quality to excellent inside six minutes.

Top panel view, showing PM2.5 reading of 216Top panel view, showing PM2.5 reading of 216
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I take advantage of a second air high quality meter to substantiate the readings from any on-board sensor, however on this check I made the error of inserting the burning pellet too near the the Core 400S. The air purifier’s highly effective fan drew smoke from the pellet away from the second meter, so it returned lower-than-normal outcomes.

My different assessments confirmed that the Core 400S has an unusually highly effective fan. Measured 15cm from the output, I recorded an air velocity of 4.9 metres per second at full energy, dropping to 1.2m/s on the lowest regular fan velocity. Even one metre above, I measured 2.2m/s at full energy – sufficient to fire up a noticeable draft in a medium-sized room.

Fortuitously, this breeze isn’t accompanied by an excessive amount of noise. From a metre away, I recorded solely 25.2dBA in night time mode – barely audible. This rose to a most of 42.7dBA on full energy, which is nearly sufficient that you just’d want to lift your voice barely. Should you stick to hurry three (39dBA) and beneath, you shouldn’t even want to do this.

That is an environment friendly air air purifier, utilizing simply 4 watts in night time mode, rising to 6W at velocity one. This creeps up a bit to 15W by the third velocity setting, however even at full energy I measured simply 23W, which is great given it’s pretty highly effective.

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Must you purchase it?

A very good air air purifier for dwelling areas

With a robust fan and first rate filtration, this air air purifier is effectively suited to dwelling areas in a decent-sized dwelling. Its sensor means you might set and neglect it, whereas the app means there are extra settings and management obtainable should you do want them.

Gained’t swimsuit each dwelling

The Core 400S is overkill for smaller houses or rooms. Conversely, it’s not essentially the most highly effective air air purifier round, and it misses out on UV sterilisation.

Ultimate Ideas

If you need an air air purifier you possibly can set and neglect, the Core 400S is likely to be a sensible choice. Its sensor doesn’t decide up unstable natural compounds, but it surely’s a helpful addition that ought to make sure the air purifier’s working hardest when the air’s most in want of being cleaned. With a robust fan and first rate efficiency in opposition to smoke, it’s as much as the calls for of moderately massive dwelling areas, too.

I actually just like the VeSync app, which provides some helpful options with out being overly sophisticated. I’m additionally impressed by this air purifier’s low noise and environment friendly working, even at excessive velocity settings. That stated, this air purifier most likely isn’t superb for these with well being situations, who could profit extra from one with a germicidal UV lamp, such because the Leitz TruSens Z-3500H or one thing else from our information to the perfect air purifiers.

How we check

Not like different websites, we check each air air purifier we evaluate totally over an prolonged time frame. We use business normal assessments to match options correctly. We’ll at all times let you know what we discover. We by no means, ever, settle for cash to evaluate a product.

Discover out extra about how we check in our ethics coverage.

Used as our foremost air air purifier for the evaluate interval

We check good purifiers with their apps and we check Amazon Alexa and Google Assistant compatibility.

We time how lengthy it takes every air purifier to take away smoke from a closed room.


How lengthy does the Levoit Core 400S filter final?

The filter life relies upon to an extent on how – and the way a lot – you utilize the 400S, however every filter is prone to final round 6-8 months.

Does Levoit air purifier take away mould?

A HEPA 13 air air purifier just like the Levoit Core 400S will take away mould spores from the air, which ought to forestall mould from rising or spreading. It received’t do away with current mould, nonetheless. If your property is vulnerable to mould, it may very well be an indication you could warmth it to a hotter temperature, purchase a dehumidifier, or just ventilate it extra – for instance by opening a window.

Trusted Evaluations check knowledge







Quiet Mark Accredited

Measurement (Dimensions)



Launch Date

First Reviewed Date

Voice Assistant

Sensible assistants

App Management

Filter sort

Max room measurement

Smoke CADR

Variety of speeds

Auto mode

Filter alternative mild

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