Cleaning review
Levoit Core 400S Review: The HEPA Label Quietly Came Off
House Fresh reports Levoit dropped the HEPA wording after a complaint from Dyson. They also found the American and European versions clear a room at different speeds.
By Paulo GerchonPublished 2 min read
Illustration, not a photo — we don’t have a licensed image of this product yet.
Levoit
Levoit Core 400S
Good · researched from 3 sources
The cleaning performance is measured and excellent, and the sensor and app do things cheaper machines cannot. Read the filter labelling before you buy, because it no longer says what it used to, and check which regional version you are getting.
- Buy if
- Living rooms and larger bedrooms up to roughly 370 square feet · Anyone who wants a real air quality reading rather than a coloured light · Households that want an air purifier with no ionizer
- Skip if
- Heavy cigarette smoke, which Air Purifier First says it is not ideal for · Anyone who wants to replace only the carbon layer · Quiet rooms at high fan speeds
We don’t list prices, because Amazon’s change hourly.
The label that changed
House Fresh reports that Levoit removed HEPA labelling from this product after Dyson complained to the Better Business Bureau.
That is a fact about marketing rather than about airflow, and it is still worth knowing. Air Purifier First's review still describes three-stage filtration with True HEPA, which is what the product was sold as. The measured performance did not change when the wording did.
What it means practically is that if certified HEPA is the reason you are buying, the packaging in front of you is the only authority. Reviews written before and after the change describe the same machine with different words.
Two versions, quietly
House Fresh is the only source to test both regional variants, and they are not the same.
The US model cleared their 728 cubic foot test room in 24 minutes. The European model took 30.
The US model draws 39.64 watts at top speed; the European roughly 26. At maximum the US model measured 60.3 dBA and the European 55.9.
House Fresh's complaint is not that either is bad, but that Levoit publishes nothing distinguishing them, so a European buyer reading an American review is reading about a different appliance.
The cleaning is genuinely good
TechGearLab ranked this second of twelve purifiers, with air cleaning scored 8.5 out of 10. In their smoke test it removed over 70 percent of fine soot and coarse ash within ten minutes, and 99 percent of pollutants within 37 minutes in a 200 square foot room.
House Fresh's 24 minute figure for a larger room agrees.
Coverage lands around 370 square feet at five air changes an hour, which makes this a living room machine rather than a bedside one.
There is no ionizer, which TechGearLab notes explicitly and which is worth having where several competitors include one.
Where it loses points
Noise. TechGearLab scored it 5.8 out of 10, their weakest category, with 29.3 dB at the lowest setting and 53.8 at the highest. Both they and House Fresh describe a higher-pitched tone than other Levoit units, which is more noticeable than the raw decibel figure suggests.
The filter. It is a single bonded cylinder containing the pre-filter, the particle media and pelleted carbon. Carbon saturates faster than particle media, and when it does you replace the whole assembly. House Fresh prices that at around $50 every six months and puts total annual running cost at roughly $144, the majority of it filters. Air Purifier First quotes up to twelve months of filter life, which would change the maths considerably.
And the app sells you things
TechGearLab's criticism is one you rarely see in a review of a household appliance: the companion app is spammy, with frequent advertisements.
That is a shame, because the hardware side of the smart features is good. House Fresh rates the laser particle sensor as better than the standard optical sensors most purifiers use, and the unit displays a real-time reading rather than a coloured light. Air Purifier First's caveat is that the sensor could still be more accurate, which matters because auto mode depends on it.
How it scored
The overall 7.6 is the weighted average of these five criteria — we never adjust it by hand.
Cleaning performance
House Fresh cleared a 728 cubic foot room in 24 minutes on the US version. TechGearLab removed over 70 percent of fine soot in ten minutes and 99 percent of pollutants in 37.
Value
TechGearLab scored it 73 out of 100 and ranked it second of twelve. House Fresh puts annual running cost at $144 in the US, most of it filters.
Build quality
A bonded cylindrical filter with pelleted carbon that House Fresh criticises, because a saturated carbon layer means replacing the whole assembly.
Ease of use
A laser particle sensor with a real-time readout and full app control. TechGearLab scored ease of use 7.1 and calls the app spammy with frequent adverts.
Noise
TechGearLab scored noise 5.8, their weakest category, measuring 29.3 dB at the lowest setting and 53.8 at the highest. House Fresh measured 35.5 to 60.3 dBA.
Pros and cons
What we liked
- House Fresh cleared their 728 cubic foot test room in 24 minutes on the US model
- TechGearLab removed over 70 percent of fine soot within ten minutes
- TechGearLab ranked it second of twelve purifiers tested
- A laser particle sensor that House Fresh rates better than standard optical ones
- A real-time PM2.5 readout on the unit itself, plus scheduling in the app
- No ionizer, which TechGearLab notes explicitly
What we didn’t
- House Fresh reports Levoit removed HEPA labelling after a complaint from Dyson
- House Fresh found the US and European versions clear the same room at different speeds
- The bonded filter means a saturated carbon layer requires replacing the whole unit
- TechGearLab scored noise 5.8 out of 10, their weakest category for it
- TechGearLab calls the companion app spammy with frequent advertisements
- Air Purifier First says the air quality sensor could be more accurate
Specifications
| Clearing time | 24 minutes in a 728 cubic foot room on the US version per House Fresh; 30 minutes on the European |
|---|---|
| CADR | 249 CFM PM1 at top speed per House Fresh; 247 CFM AHAM dust |
| Room coverage | About 373 square feet at five air changes an hour per House Fresh |
| Noise | 29.3 to 53.8 dB per TechGearLab; 35.5 to 60.3 dBA at three feet per House Fresh |
| Power | 3.05 W in sleep and 39.64 W at top speed on the US version per House Fresh |
| Filter | Bonded cylindrical assembly with pelleted activated carbon |
| Filter life | Six months at about $50 per House Fresh |
| Running cost | About $144 a year in the US per House Fresh; $85 a year per TechGearLab |
| Sensor | Laser particle sensor with a PM2.5 readout |
| Ionizer | None |
How we researched this
We have not had this unit on the bench. This review synthesises the manufacturer’s published specifications, independent measurements and owner reports listed below. Every figure on this page comes from one of those sources rather than our own measurement.
3
sources reviewed
House Fresh ran particle decay tests on both the US and European versions and supplies the clearing times, the CADR figures, the noise readings at a stated distance, the power draw, the running cost breakdown and the finding about HEPA labelling. TechGearLab tested against eleven other purifiers and supplies the category scores, the smoke test results, a second set of noise measurements and the criticism of the app; note their unit is the Core 400S-P variant rather than the plain 400S. Air Purifier First supplies the filter life and coverage figures and the observation about sensor accuracy. The sources disagree on filter life and running cost, and both sets of figures are reported.
What we read
Common questions
Does the Levoit Core 400S have a True HEPA filter?
Are the American and European versions different?
How loud is it?
What is wrong with the filter design?
Is the app any good?
The bottom line on the Levoit Core 400S
The cleaning performance is measured and excellent, and the sensor and app do things cheaper machines cannot. Read the filter labelling before you buy, because it no longer says what it used to, and check which regional version you are getting.
More home & kitchen reviews
Cleaning
Bissell CrossWave Cordless Max
Gadget Review measured suction at 0.34 kPa, which is very low. On sealed hard floors that barely matters, and on carpet it is the whole story.
Cleaning
Bissell Little Green
Blood, cat sick and coffee all came out in one session. A set-in chain oil stain lightened by about half and stayed there, which is the honest boundary of what this machine does.
Cleaning
Bissell SpotClean Pro
A mud stain came out in under a minute. Set-in coffee needed a pre-treatment and still left a mark. That boundary is the most useful thing to know about it.