LEVOIT OasisMist Smart Cool and Warm Mist Humidifiers for Bedroom Large Room Home, Auto Customized Humidity, Ultrasonic Top Fill Oil Diffuser for Baby and Plants, Quiet, 4.5L, White

These are so good, I had to purchase another one. I now have four. Been using the other three for 2 plus years and absolutely no issues.

After 14 months of nightly use our Levoit humidifier failed. I contacted the Levoit support group and after sending them a video documenting the problem they sent a replacement humidifier. Great job!

I own several wooden musical instruments that require consistent humidity levels. This is particularly critical in the winter when homes in my area (mid-Atlantic coastline, USA) tend to see deep declines in relative humidity levels that remain unstable, which is very bad for instruments. I require 40% - 50% RH in my office/study, which is an enclosed space of 150 sq. ft., something this unit should easily handle. It fails, mainly because its internal hydrometer is completely whacked. The manufacturer was perfectly responsive and professional when I complained and quickly sent me a replacement. Which was equally problematic, so the problem isnt one of a malfunctioning unit. The problem is with the product build. The first unit arrived and started great. I didnt need, nor have used, all the functions. I merely required 40-50% RH in my study. So my review doesnt get into the cool v. warm mist, aromatherapy options, remote control operations, etc. All of that stuff was unimportant to me. I just needed consistency. And for the first evening, the unit did great. Critical to this story: I bought two separate hydrometers, one for my study (placed about 8 feet away from the humidifier) the other in my wifes study, where she keeps her own instrument. That first night, the humidifiers RH reading was about 5 points above what the hydrometer was saying, which is to be expected: the humidifiers internal hydrometer sits right next to where the mist is created and where most of the mist evaporates, so it is to be expected that the readings will be a tad higher there. I wanted 40-50%, so I set the humidifier to 45%. I got 40% on the separate hydrometer when the humidifier read 45% and shut down. However, in the morning, I came downstairs to discover that the room had plunged to about 31% RH according to the separate hydrometer. It definitely felt drier. looking at the humidifiers control panel, I was shocked to see that the unit thought the RH in the room was above 80% RH (!). I can assure readers that my study felt drier and that it had not been transformed into an Amazonian climate overnight, with lichens growing off my bookshelves. This became the story of the hydrometer: it would work just fine for a time but would then get these wild excursions in RH readings. I came down one morning for 90 minutes of practice, and in that 90 minutes, the humidifiers RH readings climbed from 45% to 76%. The separate hydrometer on my desk registered 37% when I arrived and 37% when I left, which felt right. I can assure the reader that I didnt break out in a sweat due to the thick tropical atmosphere in which the humidifier suggested I was sitting. As noted, the customer support was kind and responsive. I had a new unit within a week. I didnt even need to send the old unit back. However, the new unit suffered from the same excursions in its RH readings. While a sample size of two hardly makes my experience a scientific study, it seems highly unlikely that I was so unlucky to receive two bad apples. It seems rather more likely that something is just off with the design of these units. There appears to be no way to calibrate the humidifiers internal hydrometer--if one could train the unit by using a separate hydrometer, perhaps I could live with it. But absent this, and as my instruments require consistency in RH levels through the winter when interior RH levels typically plunge in my area as people seal up their homes and turn on the central air, Im going to have to retire these units and move on to another brand/solution. I should add that both of the free-standing hydrometers (the one in my study and my wifes) were consistent with one another. They are on separate floors of the house so that one can expect somewhat different readings, but they were definitely within a few % points of one another, and they consistently trended together. If developing and maintaining consistent humidity levels is not a concern for you--if you simply want to turn the thing on and have it pump some moisture your way--I would still consider this a viable solution. Its quiet, easy to operate, and efficient (to be expected, as my study is only 150 sq. ft, and this unit is supposed to handle many times that). But if youre looking to set the desired RH level, turn it on, and walk away, my experience suggests that youre going to be disappointed.

Easy to fill. Quiet. Only reason I didnt give five stars is it takes a lot to learn the functions of the control buttons. Some buttons have multiple functions. Operation is not use friendly.

This is the best one by far. I have severe allergies and this has helped immensely with them especially at night when i go to sleep.

First of all, I want to say, that I (and my plants) loved this unit, and it has worked fine the 3 months I have used it. However, I have found that this mist humidifier (and all mist humidifiers, I guess) goes through my house and leaves a fine mist of white dust on my furnace filter, which makes my furnace short cycle! I have never heard of this before, but I had a heating guy in my house yesterday (for an unrelated issue) and he was telling me about that, and of many customers who have this issue. I think distilled water would be the best, but Ive been using about 2 gallons a day, and am not going to buy that much distilled water! Now, I have to figure out what to do, to get humidity into my house! :(

I have a wood stove, so dry air is a challenge, and Ive had about 10 different humidifiers in the past several years, so Im something of an expert, I guess. Ive tried Vicks, Bionaire, Homedic, and some more expensive units. But Ive had this for almost a month now, and I think my search is finally over... this unit has the highest output of any of the steam or cool mist units Ive tried. Its really very good, in all aspects, and I havent had any of the issues others have mentioned... it simply works, its quiet, and cleaning isnt hard at all. The controls and the amount of precise control you have over the output is excellent, and the humidistat seems to be very accurate. When its out of water it stops every time, and when you refill you dont have to reset all your settings... it holds them until you manually turn the unit off. I also like how small it is, and its very easy to move it to wherever you want it. Refilling is easy, it has jsut the right amount of capacity so its not too heavy to refill (I think its 1.5 gal) and the directional spouts work very well. Ive been extra careful with the tank after reading of some other peoples problems with cracks, and its been fine so far. Of course, with a wood stove, you need a LOT of humidity replacement. This Levoit can raise the humidity about 5-10%, but bear in mind Im using this in a fairly large area, 800 sq ft, which is almost twice the recommended room size for this unit... so technically this unit shouldnt be big enough. But I just put it near our seating area and it makes a big difference... I was surprised at how much more humid the area feels. I tried it in the master bedroom and it blew the Vicks unit away, and got it to 50% pretty quickly. With the wood stove going, none of my steam humidifiers could even move my humidity needle 1%. And out of all the ones Ive tried, only my huge evaporitive whole house humidifier has more output than this one... but while that beast can raise my humidity about 15-20% only when on the highest setting, its such a pain to keep clean, you need to add chemicals which I dont feel is very safe, and its really loud... so loud we didnt use it much. I cant really think of any negatives at all... its really a great unit. I guess if I could get 2 for the price of one it would be better, but its eel worth the money IMO. BTW, my suggestion is to stay away from cool mist... in fact I will never get a cool mist unit again. Even using 100% pure H2O (distilled) from my reverse osmosis system, it still makes a white dust, and the chemicals I tried only reduced the amount of dust, but didnt eliminate it. Theyre also really hard to keep clean, and bacteria is a real problem. Plus, who wants to add chemicals to the air you breath? Check it out... I dont think youll be disappointed. EDIT: Ive had it almost 2 years now, and the heat element stopped working for the warm mist. Granted, I use it daily all winter long, but in this day and age a heat element should last years. I simply wrote to Levoit, explained the problem, verified my receipt and all that, and theyre sending me a new one. No hassles, no cost. Thats the way it should be... great company that stands behind their products! How rare these days.

This is a great company to work with. We have two of their humidifiers and one started leaking. It was after the return time on Amazon and so I reached out to the company. Without hesitation, they sent me a new unit which is working great as well. Definitely will buy my next humidifier from this company.

Ive owned around 5 different humidifiers in the last 30 years. This is one is by for the best Ive ever used. I use mine in the bedroom to help with dryness and allergies. It is extremely quiet. If you are awake in the middle of the night you might hear an occasional brief but very quiet gurgle (air bubble). Set the desired humidity level and it will cycle on and off to keep it there. I have mine set at 55% humidity and it seems perfect for me. Mine runs around 10 hours a day and I have to refill it every 5 days or so. I use reverse osmosis filtered water and there is no musty smell in the tank. Ive been using it 4 months and hope it lasts. I did purchase the extended warranty through Amazon just in case.

Anyone else barley able to unscrew the cap on the tank? I mean I dont even tighten it that tight and its ungodly tight to screw off the tank. And Im a pretty strong middle aged male.