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Let’s analyze today the Levoit Classic 300S Cool Mist, one of the best-ranked humidifiers by users, by almost perfectly combining all the features that one looks for in these products, such as design, capacity, noises, filling, cleaning, ease of use and of course, performance.
The Levoit Classic 300s smart ultrasonic cool mist humidifier is a large one, for large bedrooms or other spaces in a home that require several hours of constant humidification or a higher-intensity mist. With a 6-liter capacity tank, it can operate for up to 60 hours in a row in its low mist mode of the 3 preset modes it comes with (low-medium-high), covering spaces between 200 and 500 square feet. Think of it this way, if you use it only at night, each tank fill will last 6 to 7 nights, and if you use it during the time you spend at home, say about 12 hours a day, you would have to refill it every 4 days. Also, add that it is filled via top-fill just by removing the lid, you don’t even have to take the tank to the sink. Its rectangular and simple design makes it easy to clean without hard-to-reach corners and a good match for any decor. It’s really very comfortable!
How do you use the Levoit 300s humidifier?
The control panel is made up of 4 buttons, one for on/off, one for switching between mist modes (auto, low, medium, high), one for the night light, and a night mode button. This model has a filter, so you could use tap water, but it will force you to replace the filter more frequently, so it is always advisable to use distilled or demineralized water. Either way, each filter will last two or three months before needing to be changed, even though the manufacturer recommends changing it every month
A great detail of the Levoit Classic 300S is that it has a built-in infrared sensor to measure ambient humidity. Why is it important? Because in automatic mode it will adjust the intensity of the mist to reach the desired humidity. And here the free App for iOS and Android, VeSync, comes into play, which will allow you to control the humidifier remotely. You can adjust the desired humidity level, program the hours in which you want it to work and save different pre-settings according to your needs, for example being able to turn it on 1 hour before you get home with a certain mist intensity or at a certain level of relative humidity in the bedroom. In addition, this makes it compatible with voice commands through Alexa and Google Assistant. The only thing it needs is to fill itself, but that’s for when it’s a robot.
And finally, the essential thing, it is totally BPA-free, very quiet, the nozzle rotates 360 degrees, it also includes a tray for essential oils where you add the Levoit aroma pads, and it has an auto shut-off system for when it runs out of water.
Advantages and weaknesses Levoit Classic 300S 6-liters Cool Mist Humidifier
Pros
Cons
Comparative with other humidifiers: Levoit 300s VS Levoit 600s VS Levoit 200s

Model |
Customer rating |
Capacity |
Floor area |
Runtime (low mist) |
Dimensions (inches) |
Weight |

Levoit 300s |
4.5⭐ of 24879 votes |
6 liters |
505 sf |
60 hours |
9.6 x 7.5 x 13.4 |
4.30 lbs |

Levoit 600s |
4.4⭐ of 8973 votes |
6 liters |
753 sf |
50 hours |
7.7 x 11.6 x 11.3 |
6.00 lbs |

Levoit 200s |
4.4⭐ of 6048 votes |
3 liters |
290 sf |
25 hours |
7.1 x 7.1 x 11.8 |
3.00 lbs |
Best Accesories for Levoit Classic 300s Humidifier
Levoit 10-Pack Top Fill Humidifier Filter Replacement…
Levoit 16-Pack Humidifier Aroma Pads…
Essential Oils Set – Top 6 Blends for Humidifiers…
Important Topics
User’s Manual
- Here you can download the Full User´s Manual of Levoit Classic 300s VeSync Smart Humidifier
- Here you can download the Quick Start Guide of Levoit Classic 300s VeSync Smart Humidifier
Filter replacement guide
- Turn off the humidifier and unplug it from the outlet.
- Remove the water tank cover.
- Remove the tank from the base and pour out any water that may be in the container and base.
- Remove the water filter from the tank by turning it counterclockwise and pulling slowly.
- Place the new filter in the same space, pressing gently and turning clockwise.
- Replace the water tank on the base of the humidifier.
- Add water to the tank to the desired level.
- Replace the water tank cover and make sure it is securely closed.
- Plug the humidifier into the power outlet and turn it on.
How to clean the Levoit Classic 300s
- Do not put any part of the humidifier in the dishwasher
- Unplug the equipment.
- Remove and wash the water tank cover and dust cover if necessary.
- Remove the pond from the base and pour any remaining water into the pond and into the base.
- Remove the water filter by turning it counterclockwise
- Rinse the pond, filter and base container with tap water. Don’t use any type of detergent, just water.
- Dry all pieces with a cloth. Make sure all parts are completely dry before putting them back or putting them away.
- If you want a more detailed cleaning process or to descale the humidifier, you must follow a process with vinegar detailed in the Full User’s Manual linked above
How to clean the Aroma Pad
- Press the aroma box to release it from the base and remove it.
- Remove the pad from the box and rinse with warm tap water
- Dry it with a cloth and put it back in the box
- Never put essential oils directly into the box or the water tank but always on the pad
VeSync App Quick Start Guide for Levoit Classic 300s Humidifier
- Search «vesync» on Apple App Store or Google Play Store and download it.
- Turn on Bluetooth on your phone and make sure you are not connected to any other device.
- Open the App and sign up.
- On the Home Screen, tap the plus sign, air quality product and select the Levoit 300s
- Plug-in the humidifier. The App will ask you to press and hold for 5 seconds the wifi button on the humidifier until wifi logo starts to blink.
- VeSync App and the humidifier are now linked. To complete the process, sign in to your wifi network.
- Once the linking process finishes, you will be able to access the controls of your humidifier on your phone.
What can I do with the VeSync App?
- Turn the humidifier on and off
- Change steam levels
- Turn on and off Auto-Mode and Sleep-Mode
- Turn on and off the night light and humidifier display
- Customize Auto-Mode settings
- Check humidity levels in the humidifier room
- Program individual timers or create custom operating schedules
Real user’s opinion about Levoit Classic 300S Smart Cool Mist Humidifier
Opinion 5/5 ⭐
«I purchased this humidifier to sit with me in the small breakfast nook that I’ve turned into my home office. I wanted something that was quiet, effective at humidifying, looked nice, and was easy to clean. This unit hits all of those marks. I especially like that I can use the app to dial the mist up or down, which is useful if I am on a Zoom call.»
Opinion 5/5 ⭐
«Living in the desert I finally realized the low humidity was causing me problems, especially at night. I set up the humidifier as soon as it arrived and was very pleased at how easy it was to set up and navigate the controls. The manual that came with the device is clearly written. It is very quiet. In my 10′ X 10′ bedroom it increased the humidity from 35% to 45% in about two hours on high. I then changed it to «auto» mode and it maintained that humidity level all night. It was very easy to set up on my phone which wasn’t a requirement for me but is very handy. I liked this device so much I bought another one for my living room»
Opinion 4/5 ⭐
«This humidifier works well and is very quiet. No dripping or gurgling sounds. It does a good job of adding moisture to the air. I use it in my master bedroom with the door closed in the winter when the air gets bone dry. It’s also good bedside if you are congested. I highly recommend it.«
Final opinion on Levoit Classic 300s Smart Ultrasonic Cool Mist Humidifier
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The Levoit Classic 300S is a smart humidifier that allows you to control the humidity and air quality in your home from your mobile phone or by voice. It has a modern and elegant design, large capacity, and long life. Plus, it’s quiet, relaxing, and easy to use, to refill via top-fill, and clean. It is a humidifier that offers multiple benefits for your health and well-being, as it prevents dryness, relieves allergies, and creates a cozy atmosphere. Its price is adequate for the quality and features it offers. Don’t forget that it is a filtered humidifier, and needs filters replacement. The Levoit Classic 300s 6-liter Bedroom Humidifier is a great option and you can purchase it here.