






💨 Elevate your air game — smart hydration for the modern lifestyle!
The LEVOIT OasisMist 4.5L Smart Humidifier combines large-capacity ultrasonic humidification with warm and cool mist options, controlled seamlessly via the VeSync app. Designed for rooms up to 430 sq ft, it features dual 360° nozzles, ultra-quiet operation, and an easy top-fill tank. Auto Mode maintains optimal humidity levels (40-60% RH) for health and comfort, while aromatherapy functionality adds a personalized touch. Perfect for enhancing sleep quality, relieving congestion, and creating a soothing home environment.













| ASIN | B0B1DQ8KV3 |
| Best Sellers Rank | #737 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #14 in Humidifiers |
| Brand | LEVOIT |
| Brand Name | LEVOIT |
| Capacity | 4.5 Liters |
| Color | White |
| Control Method | App |
| Customer Reviews | 4.4 out of 5 stars 5,088 Reviews |
| Filter Type | Water Filter Sponge |
| Floor Area | 430 Square Feet |
| Global Trade Identification Number | 00810043375542 |
| Included Components | 1 × 4.5-Liter Smart Warm & Cool Mist Humidifier, Aroma Pad, Cleaning Brush, Water Filter Sponge |
| Item Dimensions D x W x H | 10.8"D x 6"W x 11.97"H |
| Item Shape | Rectangular |
| Item Type Name | Auto Customized Humidity, Ultrasonic Top Fill Oil Diffuser for Baby and Plants, Quiet, 4.5L |
| Item Weight | 5.3 Pounds |
| Manufacturer | LEVOIT |
| Material | BPA-Free Meterial, suitable for babies and adults |
| Model Name | OasisMist Smart Cool and Warm Mist Humidifiers for Bedroom Large Room Home, |
| Model Number | LUH-O451S-WUS |
| Operation Mode | Ultrasonic |
| Other Special Features of the Product | Aroma Diffuser, Humidistat, Schedule, Smart Vesync APP, Warm and Cool Mist for Faster and Healthier Relief |
| Power Source | ETL Certified AC Power Adapter |
| Room Type | Baby,Bedroom,Bedrooms |
| Runtime | 45 hours |
| UPC | 810043375542 |
| Voltage | 120 Volts |
| Wattage | 12 watts |
L**E
Great product, works immediately
Wow - my sleep quality went from a 2 to a 10 in my house! I wasn’t sure why my sleep was so awful and it seems new heater devices in house just fried-dried up my house. I thought it was just typical wintertime but nope- this humidifier took my rooms from 29% to 57% and I couldn’t be happier in may 30?minutes tops! . The device shows you the humidity levels, gives you cool or warm mist and three levels too. Super easy to use and clean. The sound isn’t bad but the higher the mist level the more sound you hear so I put it in low overnight. To be able to breathe fully is priceless! The thing stays lit but I just face it backward at night. I’ve run this almost continuously 24/7 since I received it and I’ve had zero issues. One of the best buys I’ve made from Amazon.
T**Y
Warm and cool mist options are great
Very happy with this humidifier. The warm and cool mist options are a great feature and make it easy to adjust depending on the season. It performs consistently and keeps humidity levels right where they should be. I also like that you can add essential oils and scents — it’s a nice bonus and works exactly as expected without any hassle. Controls are intuitive, and everything just works. Well-designed, reliable, and versatile. Solid product from Levoit.
C**T
Great Humidifier
Humidifier works great and keeps the bedroom at a steady humidity. With a humidifier like this, use RO or distilled water, tap water will cause a white dust to disperse over time. Super quiet and can’t hear it operating in auto mode. The app is super easy to use and I would utilize that more than the actual controls on the humidifier. The humidifier relative humidity sensor is fairly accurate, but I’d highly recommend getting a second hydrometer and putting it somewhere else in the room, not next to the humidifier to test the real humidity. Few negatives but it doesn’t change the 5 star rating. The sleep mode function is basically useless as it mists at the lowest level humidity setting with no programming to stop at certain level so the humidity climbs to way too high levels. There is no screen display off button at the unit and you have to use the app to turn off the display if the display is providing too much light in the room at night. These are minor control nuances that they could do better in a future model.
W**M
A good unit... except for the hygrometer
PROS: * Nice large size. I poured in a whole gallon of distilled water and there was still room left in the reservoir. * The water reservoir comes out completely for cleaning and has a handle for easy carrying. * The controls are simple, including both cool and warm mist options, a timer, a sleep function, and several options for rate. * The smart app is convenient if you want to control multiple units in various parts of the house, and there is a scheduling feature. * There are two adjustable nozzles. * Nice, quiet operation. CONS: * I chose this model pver some others for its built-in hygrometer, but it’s highly inaccurate. I tested it against three other hygrometers, moving them every 15 minutes for an hour. All three read 35–36%, while this unit showed 59%. Even without these visual comparisons, the air didn’t feel even close to as humid as the reading suggested. * Since I have other hygrometers, the built-in one doesn't need to be precise. However, without it, the app is useful only as a remote control. The app tracks humidity over time, but its reports are meaningless without accurate readings from the machine. * There is a little side door with a pad for essential oils, but I'm not sure much, if any, of the EOs get into the mist. I couldn't smell them at all.
R**U
Hot and Cool Mist! Quiet and Smart - Works Seamlessly with Essential Oils.
It's a compact humidifier that produces an impressive amount of mist for its size. It operates very quietly, and the essential oil filter is easy to clean with just plain water, leaving no lingering scent behind. I have to admit, I wasn’t expecting the filters to be so easy to clean. It provides both hot and cool mist that works easily through the VeSync app or directly from the front panel. Highly recommended!
M**R
A great humidifier!
This is a great humidifier! The cleaning is very easy, which I know is a great concern for many people including myself. You can also order filters (which in my experience rarely need replacing more than every several cleanings or so) right from the app that controls it! Used Apple Pay and everything and it has me set for probably a year only $25. I know this is also a big concern for people- cost of filters and upkeep. Otherwise, the app control is great- love the option to make it either cool or warm. I would only note I wish I could customize what night mode settings are so I could actually turn off the display at night/ an improvement of this feature would be great. However, the light pollution isn’t noticeable when my eyes are closed even when I keep it right next to my bed- so, so far I have not replaced it. It’s also very quiet, I only have to fill the tank every 2 days, and fits almost anywhere. Overall, 4.6/5, rounded up for my review.
T**T
Quality Humidifier for Your Home
LEVOIT is a good brand. I have their air purifier that I use to clean the air. So I ventured out and I bought their humidifier. I like that it has a large opening at the top to fill the machine. It is SUPER quiet. The design is nice to look at and I like the fact that I can see the exact amount of humidity in the room. You have the ability to increase the mist and you can make the mist come out warm. Because my air purifier is working years after I bought it, I expect this unit to perform no differently. The water tank is clear so you can see exactly how much water you have in the unit. I cleaned the unit upon arrival. It had zero smell. The water tank is portable. It has a handle that allows you to pull the tank off the unit and fill it. I use purified water for this, versus sink water. It runs better on cleaner water. It
V**B
Works great! Quite! Functionality locked behind an app :(
Okay, so this unit looks great, works super well, and is easy to clean! I purchased mine to help my skin in the winter/drier months. I like that it has an auto mode which maintains a humidity, different mist warmth settings, and is very quite. I DO have issues with it though. Features/functionality were purposefully left off of the actual unit in order to force buyers to use their app- yup they want access to your wifi, location, and all the other juicy privacy data they can sell; oh, and of course, when you open the app there's multiple notification marks to entice you into other menus which are advertising their other products. The unit has a sleep button- this will not work the way you think it would. It's not a setting for you to use at night when you sleep. It turns off any warmth setting, display, and runs *continually*. The first night I used it, I woke up to greenhouse of a room; when I turned the display back on, it read that the room was at 95% humidity. The sleep setting is just a low-noise, no-display mode, and needs constant tending to maintain a target humidity level- it does not auto shut off. Target humidity can be set, but you need to do it in the app. I see no reason the buttons on the device couldn't be multi-purpose. E.g. long-hold the auto button and enter a mode which allows you to adjust the target humidity with the other buttons. Same for the display, long-hold on/off or sleep to turn the display off. So how do you use this at night? Download the app... set your target humidity level, put the device in auto, adjust the warmth setting to your preference, and then scroll to the bottom of the app and find the toggle to turn off the display. Doing all this will let your device run at night with the display off and will turn itself off/on to maintain the target humidity. I honestly want to rate this lower because I just don't believe this needs an app (I'm very concerned about data privacy), and I know exactly why this was made the way it was...but it just works well. It's so quite, maintains humidity well, and is easy to maintain.
Trustpilot
3 weeks ago
3 weeks ago