Humidifier, Koios Ultrasonic Cool Mist 4L Humidifier, Open Water Tank, Top Fill Water, 3 Adjustable Mist Levels, Sleep Mode, Whisper-Quiet, Real-Time Detection of Humidity for Baby Home and Office


(17 customer reviews)
  • 【Perfect for Home and Office】Koios humidifier has 4L large capacity and supports 16 hours constant work, which could bring you all day freshness with only one time water filling, and the machine will automatically stop working when no water remained.
  • 【Top Fill Water】 Add water from the top directly or put forward the water tank to add water, which are convenient and effectively avoid water leaking. You can add water into top fill humidifier at the same time watching your favorite TV show.
  • 【Multi-Function】6 smart touchable buttons in cool mist humidifier with 6 modes. Real-time humidity on the screen and 3 adjustable mist levels. Humidistat mode to keep the right humidity. Sleep mode offer a comfortable environment for your sweet dream. Anion function produces fresh anions Timer can be programmed from 1 to 12 hours.
  • 【Open Water Tank】The wide opening water tank makes it easy for you to clean every nook and cranny of the tank completely. Built-in cotton filters purify water before it is diffused. Three air filters under the humidifier clean the air wind.
  • 【Ultra-Silent】The whisper-quiet humidifier is very quiet in the operation, which won’t interrupt your working or ruin your sweet dream. 【NOTE】Please wait for 30-60 seconds after you put the water tank into the base to turn on the humidifier at the first time. And the EI code indicates no water in the tank or fail in misting, there is the solution to EI code in the description part.


SKU: B076KD5ZVJ Category: Tag:


Koios humidifier decreases the risk of illness and disease and helps relieve dry, irritated skin, to ensure your home’s optimal humidity level. With a large 4L tank, powerful mist output, this aesthetically pleasing humidifier is packed with smart features that make it the perfect solution for improving your room air quality.

Solutions to EI code
1.Take out the brush below the water tank and try to start it again, sometimes the brush is not in the proper position.
2.Pour enough water into the tank and set aside for 30 seconds to 60 seconds, let the water goes down to touch the atomized tablets, then power on the machine.
3.Please check if the water tank is placed into the base completely.
4.Please note that do not pour water into the tank through the mist outlet which will stop the running of the machine.
If you can not still solve the problem, please message or email.

17 reviews for Humidifier, Koios Ultrasonic Cool Mist 4L Humidifier, Open Water Tank, Top Fill Water, 3 Adjustable Mist Levels, Sleep Mode, Whisper-Quiet, Real-Time Detection of Humidity for Baby Home and Office

  1. Amazon Customer

    Five Stars
    Nice product and very fast responding customer service.

  2. K Mitchell

    Five Stars
    Exceeded expectations

  3. Xela Morales

    Five Stars
    Excellent Humidifier

  4. phoebe

    Easy to use and quiet
    I bought this for my mom’s room, she is very dry skin in winter in the heat room, and it’s very hard to breath in the night, I am so happy to have this humidifier, My mom’s room is big size, this can works very well for the size like 400~500 SQ FT, and it is very easy to control, has 6 modes and 3 mist levels. Sleep mode is comfortable in the night. The water tank very to clean, and build in cotton filter purify water before it is diffused. My mom loves this very much. helps a lot in heat room in winter. wonderful

  5. gabaker

    Five Stars
    As described.

  6. Alesia Blanke

    Easy to make adjustments
    Exactly what I was looking for. Runs quiet, and for a couple of days. Easy to make adjustments, nice features.

  7. T. Chapman

    Works great. As advertised.
    Works great. As advertised. A full water tank lasts 2-3 days on lower setting. Just right for us

  8. Peggy A.

    Nice humidifier
    This is my third humidifier and definitely the best. Very easy to fill and quiet. I do wish I could shut the lights completely off.

  9. MKMcCartney

    Five Stars
    Love. Love. Love. This is one of the best humidifiers I have ever used.

  10. J. Young

    Great for plants!
    I use this humidifier for some of my house plants that like high humidity. It has several settings to allow me to control the humidity level. I like being able to fill it from the top.

  11. SCM

    So far so good, I had to drill a small hole in …
    So far so good, I had to drill a small hole in the top handle area because it was collecting water. It took about 5 days to get the humidity up to 17% from 9% in a 400 sq ft room. It is very quiet.


    it’s nice and quiet.
    So far so good, it’s nice and quiet. The 4l water tank can last long more than 12 hrs. it has decent mist output and will notify you when the water near empty.

  13. Karen Gallardo

    Saved my life!
    This is an amazing product! It saved my life! No more awful nights with my poor daughter, she is having better nights since we got this humidifier! I highly recommend It!

  14. Michael

    This has been an excellent humidifier to have around the house
    This has been an excellent humidifier to have around the house. It does a good job keeping a bedroom at a pleasant humidity level. It is very quiet, and I can run it in the bedroom at night and it will not bother me at all. The reservoir is also the perfect size – we run the humidifier at night for sleeping and a full tank can last three nights. But it’s not so big that it’s bulky and heavy. I also like the controls, they are intuitive and easy to use. The humidity sensor is a nice bonus. It’s also pretty easy to clean, all of the parts are accessible.

  15. jraj

    Five Stars
    Best cool mist humidifier I ever used. Hope it last for few years.

  16. Simon

    Easy to Use and Clean
    Bought this Humidifier last week, It is better than what I expect. All you need is open the top cover, take out the bucket fill up with water and put it back. that is all you need to do. Easy and simple. and you could control the room moisture. One more thing I like the best is the floor are dry after use, unlike some other brand I have to wipe the floor every morning,the floor is wet around the machine after use.

  17. Den

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