

💨 Elevate your air game—breathe better, live better, and never miss a mist!
The Dreo HM311 is a sleek, ultrasonic cool mist humidifier designed for large rooms up to 300 sq ft. Featuring a 4L top-fill tank, it runs quietly at 28dB for up to 36 hours, delivering a powerful 40-inch mist column via dual-intake technology. Its modular design ensures easy refilling and cleaning, while added features like an ambient night light and aroma diffuser compatibility make it a versatile wellness companion for bedrooms, nurseries, and offices.
















| ASIN | B0D86SN696 |
| Batteries required | No |
| Best Sellers Rank | #434 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #5 in Humidifiers |
| Brand | DREO |
| Color | Blue |
| Customer Reviews | 4.4 4.4 out of 5 stars (15,422) |
| Floor Area | 300 Square Feet |
| Included Components | Aroma Pad, Cleaning Brush, Cleaning Guide*1, Humidifier*1, User Manual |
| Item Weight | 3.12 pounds |
| Item model number | DR-HHM001 |
| Manufacture Year | 2023 |
| Manufacturer | DREO |
| Model Name | HM311 |
| Operation Mode | Ultrasonic |
| Perfume | No scent |
| Product Dimensions | 5.51"D x 11.02"W x 10.16"H |
| Room Type | Bedroom, Kids Room, Living Room, Nursery, Office |
| Shape | Oval |
| Special Feature | 28dB Ultra-Quiet Operation, Adjustable Humidity Control, Aroma Diffuser, Easy Top-Fill, Night Light |
| UPC | 810142852647 |
| Unit Count | 1.0 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**T
Excellent humidifier!
Sturdy humidifier. Easy to set up as well as easy to refill without spilling. It has an adjustable top to choose what direction you prefer the mist to go. I have mine in a fairly large bedroom and the humidifier handles it very well. It is also very quiet instead of making a noise like Niagara Falls like some units do. This is well worth the money.
K**S
Excellent humidifier. Need to use treated water to avoid white dust
Works great in main bedroom. Easy to set up. I have been using it for three weeks with distilled water and Pure additives to tap water, and have not experienced white dust except the one time I filled with plain tap water. It is quiet and does not interfere with sleep. The hygrometer seems accurate as I have another hygrometer in the room which registers the same humidity level. It does go through about 1.5 gallons per day on the 3 level. Using the 1 level uses about a gallon of water. I have guitars in the room, which requires humidity around 45-50% and I find this to be useful for this purpose besides improving the air quality.
A**A
Falls short on safety without mist stream direction
I have 5 Dreo humidifiers in all, a newer version of this model as well as this model. Pros - quiet and effective. The light settings are lovely, I don’t use them much in main living areas but my kids love the light features for a gentle night light. Mist is cool, fine, and travels well in the air. Cons - so this is where I am really struggling with these units. The projection of the mist is so upright and narrow that it shoots more than 40 inches high. You WANT the mist up high for the best distribution of the heavier (water dense) air - i.e. your humidity. So I understand why it’s a feature to force the mist so high. And most furniture surfaces we might place this on are high up. However, you can’t actually aim the direction of the mist almost at all, period. The tops (both models I have are the same) have an adjustable top to direct the stream of mist forward or back - a fraction of an inch! It does not actually help, at all. So, if like most people, you set these units on a piece of furniture the height of a tall dresser or perhaps a short bookshelf you will saturate your ceiling. (See photo of green unit). If you put these things on a plant shelf, you’ll have huge droplets of water collecting on the underside of the shelf - and if you have grow lights, well, those are soaked now, too. (Photo of white unit on a shelf with very tall plants). In a desperate attempt to avoid mold and damage to my ceiling (or electrical components to my lights) I folded a thin vinyl notebook cover into an elbow-shaped-tube (green unit in the photos). This is both a very obnoxious thing to have to try to fix as well as an overall hazard. Many many competent designs exist to allow you to direct the flow of the mist away from items that could be damaged. My makeshift “tube” collects water (of course it does) and drips so I also have my unit sitting inside a plant tray. This is entirely too many steps to make it safe to operate my units around things like ceilings, walls, furniture, lights, and plugs. I don’t know about you, but those are all extremely hard to avoid in every house I’ve ever been inside. Eventually I will grab an angled funnel from my local automotive store to replace the make-shift tube I made to get by. By the time I buy funnels and plant trays for every unit I really start to resent the extra steps, costs, tweaking, and daily mess to maintain in the name of safety, which should be a key consideration in the design of an electrical appliance that you fill with water. Tips: Remove ALL packaging. Start on low, run for a day, gradually work your way up until the humidity is where you need it. Use distilled water only, sorry! If you want it to last and you don’t want to take it apart and clean it incessantly, used distilled water. Tap water and drinking water will introduce minerals, chlorine, and bacteria which will shorten the life of any unit from any brand and will increase the frequency of which they need to be cleaned. Put something underneath it! ALL humidifiers function by super-soaking the air with water. Surfaces nearby collect water, that water forms drips, drips make a mess. Place your unit inside a plastic tray, dish, or tote. Don’t overfill it, for real.
J**D
Compact, Quiet, and Reliable
It's. compact, very quiet, aesthetically appealing, and pumps out water vapor like there's no tomorrow. Am very happy I purchased this with the larger reservoir because it runs for hours before needing to be refilled. And with the cold winter air containing zero moisture, I run this humidifier in my bedroom 24/7 refilling as necessary. It's very easy to set up and put to use, plus the soft blue light is a nice feature in that it can be turned off or on. I would buy this one again.
G**Y
I’ve been using this Dreo 4L Top Fill Humidifier for a little over a month now, and it has quickly become one of my favourite home gadgets. What I love: • Super Easy Refill & Cleaning: The top-fill design is a game changer. No more struggling to flip over a tank without spilling water. Cleaning takes just a couple of minutes. • Quiet Operation: At night it’s whisper-quiet (around 28 dB), so I can sleep peacefully without the constant humming that most humidifiers make. Perfect for light sleepers and babies. • Long Runtime: A full tank easily lasts through the night and beyond. On the lowest setting, I get well over a day of mist without needing a refill. • Night Light: The soft glow is calming and works perfectly as a nursery light. • Healthy Mist Output: Within the first week I noticed my skin felt better, my throat wasn’t dry in the mornings, and even my indoor plants looked healthier. One small issue: Since there’s no built-in filter, I did notice that tiny flies can sometimes get into the water tank if left uncovered. It’s not a big problem, but I recommend always keeping the lid closed. ✅ After a full month of daily use, I can say this humidifier is quiet, easy to use, long-lasting, and really improves room comfort. Highly recommend for bedrooms, nurseries, or even larger rooms. 👉 Helpful tip: Use filtered water for longer life and cleaner mist!
L**É
Great humidifier, good format for a slim bench (window bench in our case). Quiet operation, can barely hear it when on lowest level. Needs regular cleaning like all humidifiers, however this model is easier to disassemble and clean compared to other ones we’ve had. Be careful to not pour water into the steam outlet of the bottom part - that’s how I ruined our first one…
D**5
Ohne wenn und aber. Das Gerät verdient einen super, ein Dankeschön, ein hervorragend! Super leise, kaum zu hören, Luftbefeuchtung und die Nutzung von ätherischen Ölen funktionieren einwandfrei. Super leicht zu bedienen, fantastisches Preis-Leistungs-Verhältnis in diesem Fall!
J**L
Its working well
F**S
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