
This Levoit Classic 300S Ultrasonic Cool Mist Humidifier review will determine if this humidifier is good for your home humidity needs. We will also learn more about what kind of value this humidifier provides for its owners.
The Levoit VeSync Classic 300S Ultrasonic Smart Humidifier is a versatile, smart humidifier that will turn any bedroom, nursery, or standard-size room into a relaxing and comfortable living area.
This Levoit 300s humidifier model offers cutting-edge features, including a humidity sensor and automatic adjustment of 4 mist level settings.
It can be controlled via your smartphone using the VeSync app, Amazon Alexa, or Google Assistant using voice control.
This 6-liter humidifier is ultra-quiet and will provide continuous mist for up to 60 hours. It offers an integrated aromatherapy diffuser tray and a night light that can be turned off if needed, making it ideal for children and babies.
Overview
The Levoit Classic 300S Ultrasonic Smart Humidifier is Wi-Fi smart using VeSync and can be controlled via your smartphone. It offers an easy-to-fill design and multiple controls for voice, Levoit humidifier App, and touch.
It is very quiet and has a long running time. This versatile and stylish Levoit smart humidifier is ideal for bedrooms, nurseries, plants, living rooms, and guest rooms.
Key Features of Levoit VeSync Classic 300S Ultrasonic Smart Humidifier
- Ultrasonic Cool Mist
- Powered by the Vesync App, it also works with Alexa and Google Assistance
- Easy to fill from the top
- Smart sensor prevents over-humidification
- Multiple controls for voice, app, and touch
- Ultra-quiet operation
- Runs for up to 60 hours
- Auto mode to adjust mist levels
- Auto shut-off function
- Night light
- Quiet Sleep Mode
- Essential oil tray

Setup of Levoit VeSync Classic 300S Ultrasonic Smart Humidifier
Setting up the Levoit VeSync Classic 300S Ultrasonic Smart Humidifier is simple.
- Remove all packaging
- Take off the water tank and remove all tape
- Place it on a flat surface
- Direct the mist spray away from furniture, bedding, and appliances
- Remove the tank lid and add water to the tank
- Place the tank back onto the base and close the cover
- Follow the manufacturer’s guide for downloading and connecting to the VeSync app
- Plug in the machine and turn it on
- Select the mode you require from Auto, Low, Medium, and High
For detailed operational instructions, please refer to the Levoit Classic 300S Humidifier User Manual.
What we like

The size of the tank is a real bonus. At a hefty 6 liters, it will run for up to a maximum of 60 hours before refilling is needed.
We love the addition of the night light and the aromatherapy tray.
You can set your target humidity level and the humidifier automatically adjusts mist levels using the built-in humidity sensor.
It is ultra-quiet, the perfect humidifier for bedroom or baby nurseries, children’s rooms, and home offices.
Setup is simple and easy, offering voice, app, and touch controls.
Easy to clean weekly using white vinegar and distilled water.
What we dislike
People who are not tech-savvy may find that connecting the machine to the mobile Levoit humidifier app is tricky to set up.
The large tank does require a few trips to the tap or a strong person to carry the bucket.
It works better with distilled water, so consider that a cost factor.
Specifications – Levoit VeSync Classic 300S
Manufacturer | Levoit |
Model | 300S |
Dimensions | 9.65 x 7.56 x 13.39 inches |
Tank Size | 6 Liter / 1.58 Gallons |
Recommended Room Size | 505 square feet |
Further specifications can be found on the manufacturer’s website.
What customers are saying about the Levoit VeSync Classic 300S Ultrasonic Smart Humidifier
Most buyers found the Levoit Classic 300S Ultrasonic Smart Humidifier easy to set up and use. They enjoyed the long running time, the handy night lights, and the auto mode to control mist.
One of the biggest gripes was the need to use distilled water, which adds to the machine’s cost of ownership.
Comparisons to other humidifiers
Levoit Classic 300S Ultrasonic Smart vs the competition.
This model really stands out from the competition due to its versatility.
It will fit into several spaces as it covers a room size of up to 505 sq. ft. With auto humidity control, smartphone connectivity and a large water tank it is a great humidifier for many uses.
Summary
We selected the Levoit VeSync Classic 300S Ultrasonic Cool-Mist Smart Humidifier as one of our Top Picks.
It has stylish looks, cutting-edge technology and is ultra-quiet.
We love the smartphone capabilities and the addition of a handy night light. It runs for up to a maximum of 60 hours and has a great Auto Mode mist setting that keeps your room at optimum humidity.





FAQ’s
Do I have to connect it to an app?
No, you don’t. The Classic 300S can be easily operated by using the touch controls.
Can I use the Levoit Classic 300S Ultrasonic Smart Humidifier in my bedroom?
Yes, the Levoit Classic 300S Ultrasonic Smart Humidifier is perfect for use in bedrooms. It features a sleep mode that operates quietly, allowing you to have a peaceful sleep.
Find out how a Bedroom Humidifier can improve your quality of Sleep.
Can I set a timer on the Levoit Classic 300S Ultrasonic Smart Humidifier?
Yes, this humidifier features a timer function that allows you to set it to run for a certain amount of time, ranging from 1 to 12 hours.
What is the 360° nozzle on the Levoit Classic 300S Ultrasonic Smart Humidifier?
The 360° nozzle allows you to direct the mist in any direction you prefer, ensuring that it reaches every corner of your room.
Does the machine need a filter?
No, it does not need a filter. You will need to replace the aroma pad if you use essential oils in the machine.
Will the app alert me when the water tank is low?
Yes, it will. It will also alert you if the tank has been lifted off the base.
Why am I seeing a white residue on my furniture?
White dust is created when the humidifier breaks down water with high mineral content. We recommend using distilled water in the humidifier as this does not produce white dust.
How does the Levoit Classic 300S Ultrasonic Smart Humidifier work?
The Levoit Classic 300S uses ultrasonic technology to convert water into a fine mist that is then released into the air, increasing the humidity level in your home. Find out more about how humidifiers work and their uses in this article.
Information: The Everything Humidifier team has experienced or researched each product we recommend on this website. We aim to keep up with innovative new products and continuously improve our information. Note – the suggestions we provide are our opinions not specific recommendations for your circumstances.
Medical Disclaimer: The effects of humidity vary from person to person, if you have a medical condition that may be affected by increased humidity, it’s a good idea to talk to your doctor before purchasing a humidifier. We are not medical professionals. Any information relating to medical symptoms is of a general nature only.