84% of 57 verified owners recommend the Levoit Core 400S.
Affiliate blogs here say 67% recommend, while the owner-based score is 84%. They earn a commission on every sale — so we show them for transparency but never let them move the score.
The headline score reflects owners (Reddit, enthusiast forums), independent lab tests, and blogs with no affiliate links. YouTube and affiliate blogs are shown for perspective but kept out — hover the i for why.
“By the way, I don't find Air Purifiers (I have four different ones) helpful in my case, perhaps the dust particles I am experiencing is larger than the units are built for.”
“it pulls some pet allergens out of the air. Works fairly well as long as the filter is alright.”
“its carbon filter has a few times more pellets than filters on these Levoit's, which means it is more effective in neutralizing bad odors and VOCs.”
“Less than two years in, the fan of the air quality sensor on one of our 400s started making a grinding sound and gave off a burning smell. They sent a replacement right away.”
“Levoit came out with a purifier recently (Levoit Core 400S) that allows you to track PM2.5 in an app over time. It's nice to have proof that PM2.5 is at minimal levels, typically 1-2 for me.”
“I’ve now had two different Levoit Core 400s, Levoit support told me to just refund it”
“I have a Core 400S, and two Core 300s. They all make the same annoying motor noise.”
“I can run 2 levoit core 400s purifiers on turbo 24 hours a day/365 days a year and that’s $72 in additional electricity cost.”
“If you want to save money, don't buy the one with the cylindrical air filter. The replacement filter is very expensive (even the non-branded ones).”
“I've tested the Core 400S CADR using drawdown and it's at least 95% at 0.3 microns, and it matches Intertek's independent test published on Energy Star (which is also about 95% of nominal CADR of 260 CFM). It works”
“I do find the constant ads annoying. When I go on it, I do it to manage my Levoit devices so I don't really want to see adverts for other Levoit products.”
“Very happy with this air filter in my place. Change the filter 2 times a year about under normal operation.”
“It has made a big difference in my breathing (have allergies and asthma). While how it makes us feel is subjective, it visibly catches plenty of dust which I vacuum off the pre-filter periodically.”
“They also need calibration to work well, and that's a whole separate area of expertise. As well as engineering to make sure air moves them well, and no light is leaking in. From reading other postings, they didn't do the best job”
“I believe it’s the levoit core 400s. It’s INCREDIBLE right now. Close everything and just let it run. It is a lifesaver right now.”
“Also likely not really HEPA. Also probably cleans air.”
“I use 3 Levoits, the Core 300, Core 400S, and Core 600S. All 3 are very good”
“Tenho um levoit core 400s e consome entre 5.8 a 35W, dependendo da velocidade da ventoinha. Aqui em casa a qualidade do ar está sempre boa, pelo que 99% do tempo gasta esses 5.8W.”
“I've been running my two Levoit 400S units nearly 24/7 for the past year or so. I've also purchased the Core 400S as gifts for family - three so far.”
“I have a Levoit (core 400s) air purifier and really like it, clears a large room of any smells etc pretty fast.”
“my allergies have been so much more bearable with a Levoit Core400S.”
“my air purifier is a Levoit Core 400S. I honestly love it. There are smaller models too, but I really like this one. It turned out to be extremely useful in wildfire season, too”
“I have a Levoit Core 300 for my living room, and a larger Levoit Core 400S for my bedroom, and have been very happy with them. The 400S comes with a built-in air quality sensor”
“The Core 400s and Vital 200s are slightly quieter and have 4 fan speeds. The Airmega 200M has 3 fan speeds, and the highest speed is noticeably louder than the Levoit models.”