LEVOIT Classic 300S 6L Smart Ultrasonic Cool Mist Humidifier

Top reviews from the United States

• Easy & Effective

  Amazon customer· Reviewed in the United States on June 27, 2026

  Verified Purchase

  Set name: 6.2L Touch Control This product has been great so far! It is extremely quiet. Honestly I don’t think it makes any noise. It is easy to take apart and wash. The night light has 2 settings and it’s a the perfect amount of soft warm light. The light kind of looks like a lava lamp when turned on and that makes it soothing and fun to look at. I have this in my living room and it has upped the humidity. I bought a brita pitcher and I use filtered tap water. This humidifier is effective and adjustable. It also doesn’t leave a film or any residue like other humidifiers. I am really impressed. 9 people found this

• Keeps My Home’s Humidity Just Right — Smart and Simple!

  Popcorn-Pham· Reviewed in the United States on August 4, 2026

  Verified Purchase

  Set name: 6L Smart Grey I’ve been using this Levoit smart humidifier for a few weeks now, and it’s made a noticeable difference in my home’s air quality. The app control is a nice touch — I can check and adjust humidity levels right from my phone without getting up, and voice control through my smart assistant makes it even more convenient for quick adjustments. What I appreciate most is how consistently it maintains the humidity level I set, rather than the up-and-down swings I got with my old humidifier. My skin and my plants (I have a few pothos and an orchid) have both been thriving since I started using it — the air just feels less dry overall, especially noticeable in the mornings. It’s quiet enough to run overnight without being distracting, and refilling the tank is simple. The only minor downside is that the app occasionally takes a few seconds to sync, but it’s a small trade-off for the convenience it offers. Overall, this is a great pick if you want a humidifier that’s both effective and genuinely “smart” — not just smart in name only. Highly recommend for anyone dealing with dry indoor air. 5 people found this

• This works and is very quiet

  Amazon customer· Reviewed in the United States on June 30, 2026

  Verified Purchase

  Set name: 6.2L smart White The easiest set up ever. This humidifier is so easy to use and the fill tank fits under the faucet. The control panel is very user friendly, water flows into the air immediately when you turn it on. And it is so quiet! I did pair it with the app for timer and light control and it couldn’t be simpler. If you don’t want to use the app you can change the light and timer settings right on the control panel. It is efficient adding humidity into my very dry Arizona air. I am very happy with this purchase and recommend it! 2 people found this

• I keep buying these humidifiers

  Shelley Graner· Reviewed in the United States on May 4, 2026

  Verified Purchase

  Set name: 6L Smart Grey This is the third Levoit humidifier I've purchased because it's quiet and effective. I love the app connectivity so I can adjust the optimum humidity level. I live in the dry, dry desert and I snore if this thing isn't running! Levoit customer service is also friendly and responsive. I had to replace this latest one because the motor was loud right out of the box, and although I had to jump through a few hoops, they did replace it. The reason I give this 4 stars instead of 5 is because the lifespan is only about 2 years. After that, the motor starts getting loud enough that it can't be run at night. But overall it's a great product. One person found this

• Quiet and Efficient!

  Amazon customer· Reviewed in the United States on August 25, 2026

  Verified Purchase

  Set name: 6L Smart Blue This is my second humidifier of this same brand and model. Using them has enhanced my use of lubricating eye drops, and between them they are helping alleviate my dry eye issue. I use only distilled water but you can also use tap water or purified water. If you use tap water, you will need to empty the water and clean all the parts that get wet every day! Otherwise, mineral deposits build up and reduce both the efficiency of the product as well as the purity of the mist. It's very easy to use, and can be paired with an app to enable remote control ability through a smart phone. Frankly, it's so easy to use manually that I don't bother with yet another app! It isn't hard to clean this humidifier but there are quite a few parts to clean, which is one reason I use only distilled water! You don't get the mineral deposit build up and cleaning can be done much less frequently. How reliable this humidifier is over time remains to be seen. I've only been using one for about 10 days and the second one just arrived today. If one or the other craters in a month or two, I will update my review. One person found this

• I love this humidifier

  LadySnow· Reviewed in the United States on August 16, 2026

  Verified Purchase

  Set name: 6L Smart Grey Easy to clean, easy to fill and hold a lot of water, and the app is just icing on the cake. If I ever need to replace it, I’ll be buying this one again but it’s been working just fine for my son who gets nosebleeds when the air is too dry One person found this

• Honestly Amazed

  B. Robinson· Reviewed in the United States on July 15, 2026

  Verified Purchase

  Set name: 6.2L smart White After researching multiple humidifiers, I settled on this Levoit 650S and I'm honestly blown away by it, enough to write a review. The designs and the features are just so over the top, you can tell they put a lot of care into a humidifier which is not a device that typically gets much thought. I'm coming from an old basic sunbeam ultrasonic unit which was loud, had to be refilled at the sink (from the bottom) and impossible to clean. This Levoit unit blows it away and it has so many features I didn't even expect. Automation & Smart Features: If you're considering this unit, it's probably for the smart features. And it's way more comprehensive than I anticipated. If you've ever set up a smart bulb, the setup and app function is very similar. You can set schedules, timers, mist intensity, change the light temperature and brightness and target what humidity level you want. There are even "scenes" I don't quite understand yet. For my schedule, I run my unit at 50% humidity during the day with the light on in daylight hue, from 9AM to 9PM. From 9PM to 9AM, the light transitions to warm 2700k, 50% brightness, and I target 45% humidity during the night. This schedule took about 5 minutes to setup. Bit of a learning curve as with any new app, but not too convoluted. Since the system automatically detects ambient humidity, you can use that as a target like a thermostat and let it do its thing. It will automatically turn on and off as needed. I didn't expect this, I was mostly just looking for something I could schedule on and off, but this is way more accurate. 45% - 50% is ideal for house plants. Above 60% you risk mold growth. So it's best to have a unit which maintains a target, rather than guessing with an on/off switch. In addition, the app keeps a history of everything, almost like a fitness app. It constantly records humidity levels, so you can see (if you wanted) what humidity was like during the night, even if your unit isn't running. Then maybe adjust it for your sleep to figure out what's best. A bit superfluous to track humidity like this, but again I appreciate the effort by Levoit. Aesthetics & Nightlight: So...the design is beautiful. Yes a humidifier is beautiful. The big tank is nicely shaped and crystal clear like glass, and the central steam column with the night light creates a very nice aesthetic. The light is perfect for a night light. Some people complained it was too dim and I think they're missing the point. It just looks nice in a pitch black room. That's it. If it were any brighter, it would be bothersome to have on at night. This is great on a night stand, though you may want the smaller model. The front plate displays the current humidity. The LEDs on the front are white and not too bright for a dark room. I've added an image and it seems brighter in the photo than it really is. It's similar to an old alarm clock, and the numbers are big and easy to read from a distance. The entire front can also be turned off if you want no lights at all. The controls are touch activated, but I mostly interact via my phone. Output & Noise: I have it set to run automatically 24/7, so I set it to the gentle/lowest setting which is completely inaudible. At the maximum setting, it can really pump out mist and is no louder than a desktop computer fan. Aromatherapy: I didn't even know this existed when I bought it, but there's a little internal tray you can add essential oils to. Haven't tried this yet, but I intend to. Orange, Lemon and Lavender would be nice. Maybe some sandalwood. Filling & Cleaning: Unlike my old sunbeam, the main base of this unit stays dry, with a wet tray over base which the tank connects to. So you pull out the wet tray and run it through the dishwasher, theoretically keeping the main unit completely clean of mold or mineral deposits as it doesn't come into contact with water. This is a HUGE feature as my old sunbeam was impossible to clean. The tank sat right into the base, so there was always water in a base filled with electronics you couldn't get wet. Again, by comparison, completely thoughtless. It's the little things that come from regular use which determine whether a product is just "meh" or "I love this thing". And this is in the latter category. I used tap water in my last unit, and we have great tap water in Colorado. But I'm using filtered Zero Water this time to avoid any mineral build up, along with stripping out chlorine and fluoride. Only pure water is emitted this way. Since the unit can be refilled from the top, you can take smaller pitchers of water to refill/top up and not have to haul a large tank. Great for older people, much more manageable. And the tank is quite large, it will last a few days of continual use without a refill. Overall, just refilling it is much less of a pain than the sunbeam was. Value: I got this on sale for a bit over $70 which I think is a great price given the features. Lots of other uglier, standard units are priced at this level. Levoit makes a lot of humidifiers and I actually think this is their best model. Highly recommended. Read more 6 people found this

• Excellent Humidifier – Quiet, Effective & Perfect for Better Breathing

  Amazon customer· Reviewed in the United States on July 19, 2026

  Verified Purchase

  Set name: 6.2L smart White I purchased this humidifier to help improve my elderly dog’s breathing, and it has made a noticeable difference. Since using it, his nighttime coughing has reduced significantly, and he’s now sleeping comfortably through the night. It’s been wonderful to see such a positive improvement. One of my favourite features is the built-in humidity gauge, which makes it easy to monitor and maintain the ideal humidity level in the room. The soft night light is also a lovely touch, providing just enough light without being disruptive. Best of all, this humidifier is virtually silent. It runs so quietly that it doesn’t disturb our sleep at all, making it ideal for bedrooms, nurseries, or anyone looking for a quiet humidifier. 3 people found this

• Excellent produit, mesure fiable et utilisation pratique

  Amazon customer· Reviewed in France on September 3, 2023

  Verified Purchase

  Set name: 6L Smart Grey J'ai acheté ce produit notamment pour fournir un meilleur taux d'humidité à mes plantes d'intérieur. Pour le moment, rien à redire, il fonctionne parfaitement. La fonction 'Auto' lui permet de se déclencher dès que le niveau d'humidité passe sous un certain seuil et de s'arrêter de la même manière lorsque celui-ci atteint le niveau fixé. Il est aussi possible d'utiliser l'appareil en mode 'Manuel' en le déclenchant soit même et choisissant un niveau de brumisation. Le remplissage se fait très simplement par le haut et le contrôle via l'application VeSync est un petit plus pratique.

• Nog nöjd

  Alexander F.· Reviewed in Sweden on September 14, 2023

  Verified Purchase

  Set name: Warm and Cool Mist Bra funktioner men låter för mycket efter ett par år. Det hjälper inte att rengöra