

💨 Elevate your space with smart, silent hydration — because your comfort deserves the best!
The LEVOIT OasisMist 4.5L Smart Humidifier combines large-capacity ultrasonic technology with dual warm and cool mist options to rapidly improve air moisture for rooms up to 430 sq ft. Featuring ultra-quiet 26dB operation, smart app and voice control, and an easy top-fill design, it offers personalized, auto-adjusting humidity levels for healthier skin, better sleep, and congestion relief. Perfect for modern homes seeking effortless wellness and ambiance with aromatherapy support.












| ASIN | B0B1DQ8KV3 |
| Best Sellers Rank | #3,793 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #15 in Humidifiers |
| Brand Name | LEVOIT |
| Capacity | 4.5 Liters |
| Color | White |
| Control Method | Voice |
| Customer Reviews | 4.4 4.4 out of 5 stars (5,272) |
| 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, Auto Shut Off, Humidistat, Remote Control, Schedule, Smart Vesync APP, Voice Control, 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.
B**W
Best room humifier with automatic mode
Love this humidifier. It works great. Top fill is the way to go. Less chance of leaks and easy to fill. The auto mode is very nice it adjusts as needed, warm or cool. Very easy to use. Works great. Definitely recommend getting the extra pads and filters. They keep unit cleaner. I like that I can use functions without the app. Highly recommend this unit for smaller rooms. I have this unit and the LV600S which I highly recommend also. I like the lv600s better for you can adjust the humidity % and its larger tank, and the fill area.
J**.
Love the humidifier, plenty of details to share
The noise level on this humidifier is so incredibly low that I barely know it’s on. Actually, I don’t know that it is on unless I look for the mist. Other than working reliably, having a quiet humidifier is important to me because I am incredibly noise sensitive. Even in a very quiet room, I don’t notice that’s this humidifier is on. Other features that are important to me: it is very sturdy and and yet lightweight. Easy to carry from them to room, very portable, and there are no leaks when the tank is full. I particularly like the sleep mode so I can sleep through the night without any light at all. This humidifier was the ONLY thing that made me comfortable when I had a very bad cold, with symptoms as bad as the flu. This cold was a beast and I was down for a week. Nothing relieved the total stuffiness in my nose except for this humidifier. Not nose sprays, not over-the-counter medication,nothing. But all I had to do was fill the tank on the humidifier then turn it on and…relief. I won’t say I had instant relief but within hours I did. Also, the heat level is high enough to be effective and yet low enough that I could lean over the mist to loosen the mucus in my nose and relieve the stuffiness.
J**N
Works great!
Works great! Quickly raises the humidity level. Within one day we noticed a difference in our skin and sinuses! The only downside is the small tank needs frequent refills.. three to four times a day. However, it works so well, it’s worth it. I just ordered two more! The warm setting is great! Fairly quiet, but it does make a soft bubbling sound. Definitely recommend! I don’t often leave reviews but felt this one deserved it!
N**Y
Best humidifier
Best humidifier I've ever had and I've had a lot. I like that it is easy to clean, easy to fill, is quiet, has a warm mist option and large capacity. I have learned to use distilled or purified water in any humidifier to prevent mineral build-up (or mineral dust from cold vapor humidifiers).
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.
A**A
quit and effective humidifier
Very quiet and easy to control via app. The tank lasts a long time and both warm and cool mist options are nice depending on the season. Great for dry air conditions. it also has a very good mist output.
B**L
Basic humidifier, could use more functionality
It does what it needs to do and is easy to use and clean. It's nice to have the app to auto turn on to the humidity level you want but the mist and heated levels still need to be manually. I also had mine set to 40% then 50% humidity but it never goes any higher than about 35-38%. Still it does help with the dry winter air. That's why I gave it 4 stars.
C**A
This humidifier is so quiet! It is in a large room, but it’s really just for me and it’s still keeping it at about 50% humidity. I have it set on the highest setting and the tank has lasted 24 hours. Super easy to fill, either by removing the tank and filling elsewhere or filling from the top. Very happy about this purchase!
P**E
I started using the OasisMist 600S and I’ve noticed quite the difference in the air quality of my home. It covers a large area easily, and the various modes do a great job at maintaining the perfect humidity level. The unit is quiet and the top-fill design makes refilling a breeze. I was also happy to find that maintenance is straightforward; I’ve cleaned it once so far and the process was quick and easy. Great product from Levoit, highly recommended!
E**O
Excelente, relación calidad y precio. Sin ruido excepto nivel de vapor caliente sin embargo es mínimo el ruido. Suficiente 2L para 8 horas. Agregue un caballito de vodka para mejorar las vías respiratorias. Recomendable 100%.
K**S
Compact size, extremely quiet. Use it every night with setting on sleep mode.
S**N
Excelente ayuda para dos problemas de salud agravados por la calefacción y el frío seco: ojo seco, fosas nasales y piel resecas. Muy notoria mejoría desde la primera noche. Además: ofrece vapor tibio (con tres niveles de temperatura) o frío, en ambos casos, con 3 niveles de intensidad o cantidad de vapor; tanque de agua grande que me dura hasta para 3 noches (no lo uso durante el día); detector que apaga el aparato automáticamente al quedarse sin agua, lo que evita descomposturas o accidentes; encendido y apagado automático y programable desde un aplicación fácil de descargar y usar, después de conectar el aparato a un teléfono o tableta mediante Wifi e identificar el humidificador (operaciones fáciles aunque NO soy un joven experto en computadoras y celulares) y un manual muy claro y completo, incluidas instrucciones muy importantes para limpiarlo y evitar descomposturas o que se formen hongos. Ruido muy moderado y luz del panel de control muy discreta que no me han causado problema alguno para dormir. La luz del panel puede apagarse, manualmente o al ponerlo en la función “Sleep” o Dormir. Varias de las críticas en otras reseñas se deben a no leer o no seguir sistemáticamente las instrucciones del manual, incluido el tipo de agua a usar, etc. Feliz con este humidificador que escogí después de leer muchas reseñas sobre distintas marcas y modelos. Para mí, vale lo que cuesta.
Trustpilot
4 days ago
3 days ago