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💨 Elevate your air game—breathe better, live better, every day.
The DREO HM311 is a sleek, BPA-free ultrasonic humidifier featuring a large 4L tank that provides up to 36 hours of ultra-quiet (28dB) operation. Its advanced dual-intake and 40-inch mist outlet design efficiently humidifies rooms up to 300 sq ft with fine 5μm mist particles that evenly distribute moisture without wetting surfaces. Designed for easy top-filling and cleaning, it also doubles as an aroma diffuser and ambient nightlight, making it a versatile wellness companion for bedrooms, nurseries, and offices.





















| ASIN | B0D86SN696 |
| Best Sellers Rank | #1,245 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #4 in Humidifiers |
| Brand | DREO |
| Brand Name | DREO |
| Capacity | 4 liters |
| Color | Blue |
| Control Method | Touch |
| Customer Reviews | 4.4 out of 5 stars 17,669 Reviews |
| Filter Type | Pre Filter |
| Floor Area | 300 square_feet |
| Included Components | Aroma Pad, Cleaning Brush, Cleaning Guide*1, Humidifier*1, User Manual |
| Item Dimensions D x W x H | 5.51"D x 11.02"W x 10.16"H |
| Item Highlight | Easy to Refill & Clean, BPA-Free, Nightlight, Supersized Air Humidifiers for Large Room, Baby Nurseries, Plants, Indoor |
| Item Shape | Oval |
| Item Type Name | Humidifier |
| Item Weight | 3.1 pounds |
| Manufacture Year | 2023 |
| Manufacturer | DREO |
| Material | BPA-Free, suitable for baby, Plastic |
| Model Name | HM311 |
| Model Number | DR-HHM001 |
| Number of Packs | 1 |
| Operation Mode | Ultrasonic |
| Other Special Features of the Product | 28dB Ultra-Quiet Operation, Adjustable Humidity Control, Aroma Diffuser, Easy Top-Fill, Night Light |
| Part Number | DR-HHM001 |
| Power Source | Corded Electric |
| Room Type | Bedroom, Kids Room, Living Room, Nursery, Office |
| Runtime | 36 hours |
| Special Feature | 28dB Ultra-Quiet Operation, Adjustable Humidity Control, Aroma Diffuser, Easy Top-Fill, Night Light |
| UPC | 810142852647 |
| Unit Count | 1 Count |
| Voltage | 120 volts |
| Wattage | 26 watt-hours |
L**K
Outstanding Humidifier - Along with Some Suggestions
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.
A**A
Excellent
Excellent air humidifier with a large water tank. It has three fan speeds and two light brightness settings: bright and dim. There is also a night mode, which is practically silent. Very convenient and functional!
D**I
Easy to use and clean
I purchased the Dreo 4L Humidifier for my son, who gets bloody noses when the environment is too dry. After a great first day of use, I followed the cleaning instructions and cleaned and dried the humidifier as recommended. On the third day of use, no mist was coming out. I tried everything, including searching online for a solution, but nothing worked. We normally never return anything, but this time we decided to try. The return and replacement process was very easy, and we received a replacement within three days. It has now been a week since we received the replacement, and so far, so good. The humidifier is easy to clean, but you do need to be careful not to get water inside the base of the unit, as this may cause issues. Other than that, we are very satisfied with the product and would recommend it to anyone looking for a basic, easy to use humidifier.
B**N
Great with some need to know below
This is an affordable humidifier that is pretty decent/great but certainly not pefect. Pros: Water tank is big enough to last well throughout the night. Quiet-makes zero noise. Good night light (two levels) CAN be easy to clean once you learn the machine-see con below Keeps a normal sized master bedroom perfectly humid all night. I never have dry throat, nose or skin problems since buying this. Game changer for my sleep. Cons: Cleaning-whew... At first, I was cleaning this product about once or twice even a week. It builds up mold super quick. I bought drops of citric acid to try and prevent it and nothing was working. After months of use I finally found the trick was to add a tablespoon of vinegar (or a big splash) to EVERY tank refill. Yes, you can slightly smell the vinegar but it's not overwhelming by any means. The tank and base after two weeks barely needed cleaning since adding the vinegar. Cleaning the base is tricky because if you get any water where it's not meant to be the whole thing will stop working. We have had to take it apart a few times and put it in front of a fan to get it back on. Sometimes after cleaning it needs a "few minutes" before it comes back on? It can be finicky. It can leak but ONLY if you don't put the pieces back together properly after cleaning, it's 100% going to leak in that case. I suggest putting this on some sort of tray to protect the furniture you place this on. Overall, I actually do love this humidifier for the price. The vinegar has made the difference between keeping this one and buying an expensive humidifier. It just takes some learning it and making sure you put it together properly and it will work well.
Z**Y
I’m pleased
This is my 3rd & cheapest humidifier & I bought it bc I I realized if you don’t use distilled water, they won’t last forever. Getting enough distilled water is to much of a pain, especially when my other more expensive humidifier’s developed other problems like leaking, or the water containers no longer fitting correctly (my previous ones had 2 large containers that were removable.) I’ve only used this one for 24 hours so I can’t speak to long term quality, but I’m already really happy with the design. My last humidifier had two bottom fill containers with a rounded top that was super hard to fill (I could go on a tangent about how badly that way more expensive humidifier was designed) & the 1st one while top fill, they still needed to both need removed for cleaning & they were awkward. I was first suprised by the size of the dreo bc I guess I thought it was bigger, but it actually makes it so easy to fill. In fact having a small water tank makes it way more easier to fill, I prefer it over larger tanks now. Like instead of filling every 2-3 days, (running on high vapor) you’ll need to fill it every day. But again it’s easy so I don’t mind. The only downgrade is less precise ability to manage the vapor & I think my other ones had a setting for higher vapor (but when I used that setting, around the humidifier would get damp). The highest setting seems to be around the setting I kept my old ones on for maximum amount of vapor without a mess. I do think this would benefit from a removable lid for the vapor port to make sure you don’t accidentally get water in it, but as long as I’m careful it should be fine. Anyways I’m pleased. I depend on humidifiers as soon as the wether changes bc I’ve always had dry skin & it gets really bad in winter. I also breathe better. Cold weather (& maybe having the heat on) causes my sinuses to feel swollen & make breathing at night uncomfortable or even hard to breathe through my nose. Which makes me feel panicked and I struggle to sleep. So I need a humidifier. I also used to be bad about cleaning my humidifiers more then once a week bc of how bulky they were & messy the process was. (You really need to clean them twice a week if you’re using them every day). It was really hard to maneuver them in the sink & id get water everywhere. This size will make that so much easier. I have an older house with a smaller bedroom and it humidifies my bedroom well. I also like a lot of humidity so I don’t know if it would work as well in a new house with a huge master bedroom. You may want to upgrade to a humidifier that puts out more vapor. But if you don’t have a huge room, and want a convenient & easy to maintain humidifier, I’d rec this one. If I have any issues or it stops working randomly I’ll update, but I’m actually happy I didn’t spend a lot more on a fancier, bigger humidifier. I’m most likely going to buy a 2nd one for my kid’s room.
P**W
Quality Product, Stellar Service
The humidifier came packaged exceptionally well, with easy to read care and cleaning instructions. It's made from high quality materials and nothing feels cheap or flimsy. One of the warning labels did leave behind a sticky residue which was impossible to remove without rubbing alcohol, but at least the plastic underneath wasn't scratched or scuffed when I peeled them off. There are quite a few parts to remove and clean before and in-between each use, but given how dangerous mold can be, I actually view this as a good thing. The unit comes with a tiny cleaning brush, 3 (total) aromatherapy pads for essential oil, the instruction/warranty booklet, and a helpful quick cleaning guide. The humidifier is very powerful and produced a huge plume of visible mist the instant it was turned on. You'd really have to strain to hear it make any noise at all, as the unit is virtually silent. There is a rather loud beep each time any button is pressed, but these noisy beeps are the only feature I could see anyone having an issue with, everything else about this humidifier is fantastic. I'm very pleased with my purchase. There is an optional nightlight of a soft teal color that can be set to high, low, or turned off. This nightlight is quite pleasant, and if anything, I wish it were a bit brighter on high. You can see a little waterfall trickling inside the unit when this light is on. It's really cute, and again, totally silent. Just a few things to note: - Never add essential oils to the water reservoir, the instructions are clear that this will damage the unit. There is a little tray in the back with an aromatherapy pad that can be used instead. The scent produced is mild, as this humidifier is not a dedicated diffuser, but my orange blossom oil was noticeable and enjoyable. - Dreo customer service is out of this world! There was this little silicone ring not specifically mentioned in the cleaning instructions which I took it off to clean before first use, but I walked away to let everything dry and completely forgot how to put it back on. There are a few different places where the ring looked like it could fit, so I had to sheepishly write to customer support for help putting it back together. Tracy immediately sent me a custom-filmed video of how to reinstall the ring, which was way above and beyond anything I could have asked for. I've never had such a fast and incredibly considerate response from a company, it really blew me away. (Thanks again Tracy, you are seriously fantastic!) I'll include the video she sent me here, just in case anyone else is as forgetful or clumsy as I am. xD - The care instructions recommend use distilled water, not tap. This might be a factor for some people, so I thought I'd mention it. (But using distilled water is always best with ultrasonic humidifiers like this, otherwise you'll be breathing in all the minerals and particulates found in your tap water, and a thin white film will eventually build up all over everything in the area.) - The tank size is really generous, an entire gallon of water is needed to fill it up! That one gallon lasted all day and all night with the unit running on high, and I could definitely feel the difference in the air. Eventually had to turn the humidifier down to low, this thing really works. I am very pleased with this product and would definitely buy another. Super high quality, especially for this price point, and the company actually cares about its customers with phenomenal service and support. I can't recommend it enough, you should get one!
E**A
Love, love, love this!
I ordered this because I have a 5 year old daughter that seems to always be sick. She catches every cold, virus, really any sickness that goes around. We got it because we were hoping it would help with her constant stuffy noses and sore throats. And it has helped a lot! She doesn’t complain when she wakes up in the morning anymore about her throat being dry or hurting. Her nasal congestion has drastically reduced. She even seems to be getting over illnesses quicker. We have a smallish room, not majorly small but not big either. We can use it on level 2 or 3 and it works great. It’s easy to turn on and adjust. And there’s even a tray you can add essential oils into! It does hold a whole gallon of water, maybe even a little more, and depending on what setting you use will determine how often you have to fill it. If we use it on setting 2, it will last us 2-3 nights of continuous running through the night as we only use it when we sleep. If we use it on the 3rd setting, we get 1 night of use before we have to refill it. It does have an auto shut-off function and will shut off once the water level gets too low. It’s relatively easy to clean and comes with cleaning instructions and a brush to clean it with. My child is also getting her tonsils removed next month, and we believe this will help a lot with her recovery from that as well as it will help keep her throat from drying out. All in all I’m very happy with this purchase and will purchase another one should this one ever quit working. We’ve had it for a little over a month now and so far it’s still going strong.
P**J
Very easy to use nice large reservoir and you open the top and pour in the water
We’re up in the high desert in Verdi Nevada so we almost always have a humidifier. This is the latest one. They always seem to work for about six months to a year.. I do like this unit as it’s got a light in it and it’s got a pretty good size water tray and you can just lift the top up to refill Hard to give it a real review because part of my review would be how long it lasts in this case I don’t know, but as far as a good looking functional device, it fits the Bill
M**A
100% recomendable
Perfecto, lo recomiendo 100%. Mi iaia lo mecesitaba porque se le resecan los ojos durmiendo y el medico se lo recomendo. De momento 10/10. La bateria dura y cumple su funcion perfectamente
M**A
Works great
Honestly it changed the smell in the hall after starting Great quality as well
M**O
Play Misty for Me
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.
J**L
Satisfied
Its working well
C**A
Buen producto
Tengo más de 1 año con él y funciona a la perfección, buen producto
Trustpilot
4 days ago
3 weeks ago