






💨 Transform your space into a smart, soothing oasis—fast, quiet, and effortlessly chic!
The LEVOIT Smart Warm&Cool Humidifier is a premium 4.5L top-fill device designed for up to 40㎡ rooms, delivering rapid humidification at 550 ml/h with quiet operation (26dB). Featuring smart app and voice control, customizable lighting, and aroma diffusion, it offers up to 45 hours runtime. Its double air speed design accelerates warm mist output 3X faster than previous models, ensuring healthier air for babies, plants, and professionals seeking comfort and style.












| ASIN | B0BSFX9YJ2 |
| Best Sellers Rank | 334,150 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 123 in Single Room Humidifiers |
| Brand | Levoit |
| Brand Name | Levoit |
| Capacity | 4.5 litres |
| Colour | White |
| Control Method | Remote |
| Customer Reviews | 4.3 out of 5 stars 1,396 Reviews |
| Filter Type | Demineralization |
| Floor Area | 40 Square Meters |
| Floor area | 40 Square Meters |
| Included Components | 1 x Quick Start Guide, 1 x Smart Humidifier, Aroma Pad, Cleaning Brush, User Manual |
| Item Dimensions D x W x H | 27.4D x 30.4W x 15.2H centimetres |
| Item Shape | Rectangular |
| Item Type Name | Humidifier |
| Item Weight | 2.4 Kilograms |
| Manufacturer | LEVOIT |
| Material | Plastic |
| Model Name | LUH-O451S-WEU |
| Model Number | LUH-O451S-WUK |
| Operation Mode | Automatic |
| Operation mode | Automatic |
| Other Special Features of the Product | Remote Control, Schedule, Smart Vesync APP, Timer, Warm and Cool Mist for Faster and Healthier Relief |
| Power Source | Corded Electric |
| Product Warranty | 2 year manufacturer guarantee. |
| Room Type | Bedroom |
| Runtime | 45 hours |
| UPC | 810123677078 810043377041 |
| Voltage | 220 Volts (AC) |
| Wattage | 280 watts |
G**A
Levoit do it really well
I bought this for two reasons, 1 - I had previously bought 3 of the same humidifiers from Argos that were the cheapest at £50 and worked fine but the design was terrible and leaked and broke after a year. For £30 more this offered a lot more and looked better design as well as... 2 - ... It was Levoit, I have an air purifier by them which has been great and worked really well. They seem to be spot on with pricing and it is quality stuff in my opinion. In brief, the main part I love about this machine is that it is easy to fill and clean. So many machines you have to fill from the bottom!?!, where as this fills from the top. it easily comes apart to fill and slot back on, as well as all the parts unclip easily to clean. after using for a while they do need cleaning so to be able to separate it out easily is great. Using it is simple, but if you download the app it makes it really useful. One thing I love about this machine which I didn't know it could do, is that you can set the humidity level you want for your room and then set it to auto and it keeps it at that level, turning off when its reached. So no more waking up in a rainforest atmosphere in the morning. Hot and cold air is a boon too as well as being able to turn the display off. It's light, it's silent, it works, you get spare parts with it! For the price of this, it's a little bit more expensive than a cheap humidifier but does everything you need and well.
A**V
Pshhhhh
Does its job well. Very easy to clear. Works nicely with an app. The tank holds enough water for 2-3 nights. The only downside: when you switch the humidifier off and then on (for example, refilling the tank), it doesn't remember your last steam temperature setting. It is a very minor downside of an otherwise solid product.
M**S
Solid Build & Good Mist, But Auto Mode is Unreliable Due to Sensor
I recently purchased the LEVOIT Smart Warm & Cool Humidifier (4.5L), and have mixed feelings about it. Build Quality: The unit feels solid and well-constructed. It looks sturdy and seems like it will last. Mist Functions: Both the cool and warm mist options work effectively, delivering a good amount of humidity into the room. Smart Features & Connectivity: Pairing the humidifier with the mobile app was surprisingly easy. It connected smoothly to my 2.4 GHz Wi-Fi network using WPA/WPA2 security without any issues. The Major Problem: Inaccurate Humidity Sensor: This is the biggest downside and significantly impacts the unit's core functionality. The built-in humidity sensor seems highly inaccurate. Useless Auto Mode: Because the sensor is unreliable, the automatic mode doesn't work as intended. I set my desired humidity level to 60%. The humidifier runs until its display shows 60% and then shuts off. However, within just 2-3 minutes, the display reading plummets to around 50%, causing the unit to start up again. It's extremely unlikely that the actual room humidity drops by 10% that quickly. This constant, unnecessary cycling makes the automatic feature frustrating and essentially unusable if you rely on the built-in sensor. If you're buying this specifically for reliable, set-and-forget automatic humidity control based on its own sensor, you will likely be disappointed. It's a shame such a seemingly well-made device is let down by a critical component.
A**A
Alexa function is great
Two years after still going strong. I like the Alexa function where it turns the humidifier on and off. My daughter loves the mood light function.
B**A
Amazing product
Excellent product
O**W
Very quiet and does a great job
Having looked around for different humidifiers this one seemed to offer a good overall balance of price whilst being able to automatically maintain a set level of humidity. The unit looks good and has good capacity - I have it set to 70% and it is able to go at least two days without needing a refill. The noise levels are really low which helps as I'm a fussy sleeper. The app is also really good, so I can set it up and let it run remotely. It is super easy to refill and the coloured LED's are a nice touch but I don't use them. Build quality seems pretty good and it doesn't drip water around the unit. If you are after something you can set up and leave to it's own devices whilst being quiet - I'd recommend this.
S**H
Too much of a phaff!
I purchased this product as I thought it would be useful. When it arrived it was larger than I had thought - my own fault i should have checked the dimensions more carefully. But when I read the instructions I realised it was going to be a pain to live with, and high maintenance. For example you are not meant to it place on a floor, or 30 cm’s near a wall. The water requires changing every day. Then every three days you need to take the thing apart and completely wash and dry the components. I counted 8 pieces to take apart and reassemble - it just seemed such a phaff, I didn’t even take it out the wrapping. I simply boxed back up and processed a return and sent it back. It’s probably good at doing its job, but I could see after a few weeks of use, it would annoy me, and it would end up not being used.
M**K
Big powerful humidifier.
This is a large bit of kit. Even on the minimum setting it churns out a fair bit of mist to raise the humidity. The app s very good. It has a really nice feature for indoor house plants and the care of them using the humidifier. The essential oil dispenser though is rubbish. It doesn’t work. All in all a nice bit of kit. Well made. Good app. Not really any good to use with essential oils.
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