- Technology
Three-stage filtration system, check. Hands-free voice control, check. Reliable air quality sensor, check. 21% discount for Black Friday and Cyber Monday? Check.
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(Image credit: Levoit)
The Levoit 400S uses a True HEPA 3-stage filter that captures dust, pollen, smoke and pet dander. In our hands-on review of the air purifier, our tester Joanne Lewsley reported that it removed 99.5% of particles at 0.3 microns or smaller and 100% of particles smaller than 2.5 microns and 10 microns or smaller. This is a level of performance often seen in pricier purifiers, which is why we are more than happy to recommend this product.
Even in a sealed room, we noticed cleaner air after just 30 minutes, clearing match smoke and incense effectively. If it can handle this, it can easily handle pet and seasonal pollution.
Save 21% ($49.01)Leovit 400S: was $230 now $180.99 at AmazonDespite costing under 200 bucks in this Black Friday and Cyber Monday deal, we think the Levoit 400S is great value for money and gives more expensive units a run for their money.
View DealTester of air purifiers and electric toothbrushes
Tester of air purifiers and electric toothbrushesJoanne LewsleyContributing health writerJoanne Lewsley is a freelance writer and editor, covering health and lifestyle news and features. She mainly creates evidence-based health and parenting content and has worked with a number of global sites, including BabyCentre UK, Medical News Today, Fit & Well, Top Ten Reviews, and Yahoo! but also contributes regularly to Live Science on health products such as air purifiers and electric toothbrushes.
- We are currently hunting high and low for all the best Black Friday deals of 2025 so be sure to check out every deal we've found over on our main hub.
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We really like the color indicators that change as air quality improves.(Image credit: Joanne Lewsley)
As air purifiers go, this is a fairly compact one.(Image credit: Joanne Lewsley)
(Image credit: Joanne Lewsley)
(Image credit: Joanne Lewsley)We especially loved that on the control panel, a series of color-coded indicator rings tells you how clean your air is right now (from red to green/ poor to clean) as air quality improves, so there is no need to check the accompanying app if you don't want to.
We also liked the compatibility with smart home assistants like Alexa and Google. You can change the settings without having to touch the machine, so you can put it out of sight/reach if you don't want to access it often. In a similar vein, you can set schedules and timers as well. Set it up once and let it do its thing, just what we like.
Overall, this is a stylish, powerful air purifier that delivers excellent results without breaking the bank.
Key features: Covers rooms up to 400 square feet, true HEPA 3-stage filter, app control, voice control, air-quality indicator lights, sleep mode
Product launched: 2021
Price history: The price usually floats around $210-$220, so at $180, this is a genuine deal.
Price comparison: Amazon: $180 | Levoit $181.99
Reviews consensus: This is an excellent air purifier that is big on performance but gentle on the wallet. When we reviewed it in 2022, we thought it was the best air purifier around; it has only been dethroned by its younger sibling, the Levoit 600S. It has 22,000 reviews on Amazon and a 4.7-star rating.
Live science: ★★★★½
Featured in guides: Best Air Purifiers (until replaced with the newer model)
✅ Buy it if: You want an excellent machine to clean your air without having to spend a fortune.
❌ Don't buy it if: You'd prefer to have the newer, more powerful model, the Levoit 600S - which happens to be our favourite air purifier.
Check out our other guides to the best telescopes, binoculars, cameras, star projectors and much more.
$180.99 at Amazon $180.99 at Amazon $180.99 at Amazon Sign up for the Live Science daily newsletter nowContact me with news and offers from other Future brandsReceive email from us on behalf of our trusted partners or sponsorsBy submitting your information you agree to the Terms & Conditions and Privacy Policy and are aged 16 or over.
Jase Parnell-BrookesSocial Links NavigationManaging Editor, e-commerceJase Parnell-Brookes is the Managing Editor for e-commerce for Live Science and Space. Previously the Channel Editor for Cameras and Skywatching at Space, Jase has been an editor and contributing expert across a wide range of publications since 2010. Based in the UK, they are also an award-winning photographer and educator winning the Gold Prize award in the Nikon Photo Contest 2018/19 and named Digital Photographer of the Year in 2014. After completing their Master's degree in 2011 and qualifying as a teacher in 2012, Jase has spent the last two decades studying and working in photography and publishing in multiple areas, and specializes in low light optics and camera systems.
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