DREO 4L Humidifiers for Bedroom, 36H Runtime, 28 dB Quiet, HM311 | Easy to Refill & Clean, BPA-Free, Nightlight, Supersized Air Humidifiers for Large Room, Baby Nurseries, Plants, Indoor

I was struggling to get rid of my cold, and my old vaporizer no longer seemed to be working. I bought this one mostly because it was on sale. The first night had me expelling my congestion right away. I honestly felt better by the second day of having this unit, and by the third I was completely recovered. I love how quiet it is, and it’s not overly complicated to use. Cleaning it is easy, too. Definitely worth the price.

Update 4/17/2026: This is a great unit, I highly recommend cleaning the entire unit weekly to at most every 2 weeks. As my lung infection started to clear up, it started to get worse again! My doctor asked if I cleaned the humidifier yet? I said, "No, not yet". I can't remember the exact phrase she used, "humidifier bacterial infection". I cleaned out the the humidifier and was surprised with the amount of fungal growth that was in the very bottom of the both humidifiers especially the larger unit, this one! It took me a long time to thoroughly clean it out! one week later it had fungus growth but not much and was so much easier and quicker to clean out. Use white vinegar soft cloth and soft brush to clean out the base. By the way don't get water into the electrical part of the filter. If water does get into this section do not turn on until it is completely dried out or you will kill the unit! Updated: 2/8/2026 Dreo humidifier has been working non stop since I purchased it. My room has not got up to 60% humidity yet, the highest it got was 50%. However it doesn't hold it there long. I does go back down to 20-25% especially at night. I am feeling better but not fully healed... so, I am going to buy another one to help get the humidity of my room up to a healthy level! original post: Just what I needed for my small room, a new room temperature and humidity monitor I discovered my room humidity was 20% and for several years I kept getting sick at the same time of year, now I know why! This unit took 24 hours to get my room Humidity up 45% that is how dry it was, I feel much better already! The unit is whisper quiet and you can see the cool mist blowing up and the cool blue LED light is nice. I had to fill the unit up 3 times so far, I did not wait until the until shut down from the lack of water. I highly recommend this unit, well worth the cost. Less expensive than a doctor's visit for Upper respiratory infection and all the complications from that!!!

I really like this humidifier a lot! First off it's really easy to fill and use. It doesn't have one of those screw on caps, the top just comes off, you fill it, and put it in the basin and turn it on. Second it puts out a steady stream, it's effective. Third I think for what you get the price is great. It also has some other cool features that I don't care about as much but they're nice. It has a digital display that tracks the humidity in the room and you can set it to auto hit a target level. It's almost silent. It has a little night light feature that easily turns on and off. The digital controls are nice and easy to use. 5 stars, happy customer!

This is probably one of the best humidifiers I’ve ever seen and used! It’s definitely one of the most unique and in my opinion, coolest looking one. I like how it looks unique and almost alien tech-y. As it’s a dome and basically has a dark “glass” sort of look to it with those cool lights. By the way ! The lights are not changeable. The lights change based on how humid the room is based on what it detects. It only changes from light green to green to blue I think. I got this with one of the sales for about $34 and if I’m being honest, this is worth every penny. It exceeds in every way and is definitely worth your money. It’s very easy to use, all you have to do connect it to electricity, take the lid off and pour water in, click it on and it basically automatically runs based on how much humidity you want. It’s extremely quiet, you can barely notice it. But I like to have it by my bed side and I sort of treat it like a white noise machine for myself. It’s not irritating at all, it’s almost soothing in a way hearing little bits of water pouring in itself sometimes. Whenever I pour water in, I’ve never noticed any leakage or anything wrong. It seems to be flawless and doesn’t leak at all. Even when switching the water. I’m not sure how long it will last. Sine I’ve just got it. I’m hoping it lasts for years but I’ll have to update the review if it doesn’t. So far, it feels like it’s built really well and is very user friendly, which is very easy to figure out. BUT - I will have to point out one thing I don’t like. You can’t disconnect the wire from the base/humidifier. (Which kind of seems misleading when the picture shows the humidity one its own with now wires). Now I didn’t expect it to be battery powered or able to work without a wire. But I thought you could disconnect the wire from the base. Most humidifiers I have own previously has allowed me to disconnect the wire from the base so that I can just take the base itself to clean out. This gets really annoying and kind of a hassle to deal with, when you have it placed somewhere where you have the wire hidden behind furniture or a table etc. I personally have it on a night stand where I have a mini desk shelf and organizer. So it gets annoying having to kneel/duck under my night stand or move it slowly and disconnect the wire from the wall, all that just to clean bowl. I wish they made the wire built in a way where it can disconnect and connect to the humidifier. That way I wouldn’t have to do any kneeling or moving things around to reach the outlet. Plus the wire gets caught or jangle around when you start to pull the humidifier which is annoying. Now I’m a young person, so I can do as much kneeling. But if you’re an older person, or someone who has a bad back, this would get VERY tiresome and start to become pointless to have. Also it’s rare to have an outlet just out in the very open especially in a bedroom. It’s made aesthetically and looks beautiful so it’s definitely made for a nightstand or table. So they should’ve thought about the wire issue and make the wire dis-connectable. For user ease. That being said I only have it 4/5 just because of the wire issue.

Where I live, the air is really dry, so I usually wake up with my nose, kind of hurting from the dryness very dry, but it keeps my nose and really moisturize and also if I sleep with my mouth open, I don’t get a sore throat from the air my skin is hydrated. I actually really love love love this is very quiet. Very easy to use in. The mist is amazing and refreshing.

Some helpful hints I found have helped to keep this humidifier working. First, make sure the tape and Styrofoam block are removed from the product. Second, when filling the tank, make sure that room temp water is added, especially the for the first time. Hot water may damage the seal. Third, do not fill water above the MAX level. The extra weight may cause leaks in the seal. Fourth, all small humidifiers like this will get bacteria/mold if not cleaned every 2-3 days. It is the nature of having water heating up for days without cleaning. If you don't like cleaning it every three days, understand that there will be mold/bacteria inside the base's small tank. It's just that simple. Cleaning is easy, but it takes some time to thoroughly clean the unit. ... and fifth, make sure NO water gets in the part that looks like a tower on the base's smaller tank. A small amount will flood the air intake and the electronics' board. This will mess up the controls. If it does happen, use a blow dryer on low to try and dry the board at the base of the unit. Otherwise, a couple of days should dry it out. If it isn't severely flooded, it may still work. Also, NEVER put anything but water in the tank when in use. Vicks, scented oils, or anything else will wreck this humidifier. The only thing I use in the tank is white vinegar to clean and descale it, but after that kind of cleaning, I rinse it out thoroughly and then dry it completely. Keep in mind, tap water is not the best water to use (lots of minerals) which is why white dust from this humidifier can go everywhere in the home and stick to the inside areas of the humidifier. Best to use distilled water or at least buy a demineralizing cartridge if using tap water (they last 4-6 months). Hope these helpful hint work for your humidifier. Took a lot of trial and error beforehand, but once I used this information, there hasn't been an issue yet with my Dreo humidifier or any of my previous humidifiers. Best of luck UPDATE: I started to have some issues with dust just like what others have be experiencing. I contacted Dreo by email and customer rep, Carol Hesung, was able to help resolve the problem. While suggesting that distilled water is the best way to combat the dust, I mentioned it wouldn't work out for me due to the high cost of distilled water per month. Carol understood and offered a complete refund for this unit and for the larger unit I purchased. Not only that, the demineralizing cartridge filter (3-pack) I bought was also refunded. Carol said there was no need to return any of these products. Not only was I pleasantly surprised with this outcome, it proved to me that Dreo is all about making it right for the customer if problems arise. With the actions Dreo has made, I will definitely recommend them and make future purchases from this company. Their customer service has been stellar and I wish other businesses would follow their lead. The Dreo team puts customers first and that is one of their best services offered. Thank you Dreo and thank you Carol. I was able to set the Dreo up quickly and finally get some moister back into my room. So far, this is product is working very well. It is super quiet, compact and easy to take apart, clean and put back together. There are many easily operated controls for such a small unit. 4L is quite small for my living room, but for a small bedroom, this will do the trick. I am pleased with the looks, the style, the easy operation, the light system, but most of all the steam output and the way you can direct the steam is an added bonus. If this can last as long as my old humidifier of 9 years, then I will be that loyal customer only to Dreo for sure. It really is a good humidifier even for its smaller footprint. Definitely recommend.

I am thoroughly pleased with this purchase and highly recommend it! If you are in need of a reliable humidifier, this is as quiet as they possibly come. I have insomnia and sleep with my loudest fan running every night, but for those who enjoy true silence, I think you will be completely pleased. It comes with a noise-reduction tool/silencer piece, but honestly, it runs so quietly on its own that I don't even feel the need to use it. ​A few standout features: ​The Night Light: I love it! I turned the humidifier on a while before bed last night, and when I walked back into the room, the built-in light gave off enough glow that I didn't even need to turn on my main overhead light. ​Customization: If you don't want any light on while you sleep, you can easily turn it off. ​Smart Indicator Light: For anyone wondering, it doesn't cycle through fancy RGB colors—the light changes to let you know your room's humidity level (too high or too low). If you want an upscale, colorful light show, this isn't it, but for a functional indicator, it's great. ​Convenience: It also features some fantastic auto options that make managing room moisture effortless. ​Overall, an amazing appliance. Highly recommend!

I have a house whose AC is good at what it does, but it also drys out my house very easily. I bought this in my computer room (where I am usually am) to moisturize the room as it is terribly dry. This humidifier is a cool mist humidifier. The mist comes out of a spout in the top, the water tank sits on the top of the base and the magic happens in the base as there's a cutout down there where the water gets evaporated, and the mist get sent up through tube in the middle of the device (up through the middle of the tank to the spout at the top). There is also a small plastic filter within the tank itself that is easy to remove clean and re-attach. The device itself is easy to fill and maintain (I empty the tank daily and clean it every two weeks). The device itself specifies you use distilled water, and I recommend you do so. It makes cleaning the device easier, and you don't need to clean the device as often. If you use tap water, all the imperfections in the water cause white residue and minerals to build up in the device (including bacteria and mold build-up). I would also recommend you get a hydrometer for the room you intend to use this in as I am not sure the way this device measures the humidity is entirely accurate (it shows it as a percentage on the front of the device). I use the reading to see how effecting the device is being (more or less). This also is not a "smart" device so you can't operate it remotely with an app on your phone. The machine also has an auto mode where you can set it like a thermostat, and it'll run the mist (lighter or harder or off altogether) dependent on how much humidity the device senses. If you don't prefer this, you can see the device between 3 settings low, medium, high (1 2 and 3 respectively); it will run the device at those strengths continuously. This device is fairly okay with water consumption. It will go several hours before you might need to refill it dependent on how much and what settings you run it. I recommend keeping a couple of bottles of distilled water on hand. Lastly, the device has a sleep mode and power button (which are on the same side). The "sleep" button will just turn off the interface while the vapor comes out (useful for when you sleep with the device). When cleaning, follow the manual's instructions. DO NOT RUN WATER ALL OVER THE BASE as there's some electronics in the base. When you clean the tank, be careful as the bottom of the tank will be a bit wet; only fill the tank when it's on the base otherwise you'll dribble water everywhere on your counter and such. I like this device and it works well. Just make sure you use distilled water (or invest in a countertop water distiller).

Stille luchtbevochtiger, fijn voor de slaapkamer omdat het licht uitgezet kan worden.

Super efficace et puissant…

Excellent indoor humidifier

Return money is not refunded Product was damaged

Wow. This is a great product. It has an excellent cool mist output that doesn’t leave the surrounding area wet. I have Sjögren’s disease which means I suffer from extremely dry eyes, airways, skin etc and have been struggling with cracked and sore nasal passages (it’s as awful as it sounds) and I can honestly say that after 3 nights use, I am seeing an improvement. I live in a hard water area and this humidifier has special cartridges that will help with that. It also doesn’t seem to have small output holes that will get furred up. The other, small and cheap models have all failed after a few months due to limescale. For the size/water capacity of this model, it is exceptionally good value. So far it seems good quality and has great humidifying properties. It’s really quite quiet too. I also like that you can turn the light off. Would definitely recommend.