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Purifier vs Humidifier
Decide whether to filter dust, smoke, pollen, and odors with an air purifier or add moisture to dry air with a humidifier.
Dreo HM311 Top Fill 4L Supersized Cool Mist Humidifier
Ever tried to sleep with a jet engine disguised as a humidifier? Yeah, not fun. That's why ours whispers at a barely-there 28 dB—thanks to some fancy ultrasonic tech that keeps things library-quiet. (Sweet dreams, seriously.)
And let's talk mist. This thing doesn't just puff out a sad little cloud. With its dual-intake and a 4-inch outlet, it shoots mist up to 40 inches tall. Your room will go from desert to rainforest in no time, minus the actual rain.
Wet floors? No thanks. The high-frequency atomization breaks water into 5µm particles so fine, they float around like they own the place, humidifying evenly without the puddles.
Filling it up is a breeze—literally. The top-fill design means no awkward tank flipping or spills. Just pour and go. (We've all been there with the old spill-and-swipe routine.)
Perfect for bedrooms? You bet. With a 4L tank, it can run for up to 32 hours. That's over a day of moisture without a refill. Ideal for those who value sleep over constant maintenance.
Want to add some zen? Toss in your favorite essential oils (not included, because we don't know if you're a lavender or eucalyptus person) and turn your room into a spa. Or at least smell like one.
And for those nights when you're not ready to face the dark, the ambient night light has settings to match your mood—whether you're going for 'chill' or 'deep space exploration.'
General specs
- Brand: Dreo
- Model: HM311
- Seller: Amazon
- ID: B0CCY6VG8Z
- Shape: Oval
- Voltage: 120 Volts
- Wattage: 26 Watt-hours
- Room Type: Office, Kids Room, Bedroom, Living Room, Nursery
- Floor Area: 300 Square Feet
- Filter Type: Pre Filter
- Item Weight: 3.12 pounds
- Control Method: Touch
- Operation Mode: Ultrasonic
- Special Features: Night Light, Adjustable Humidity Control, Easy Top-Fill, 28dB Ultra-Quiet Operation, Aroma Diffuser
- Product Dimensions: 5.51"D x 11.02"W x 10.16"H
- Included Components: User Manual*1, Cleaning Guide*1, Cleaning Brush*1, Humidifier*1, Aroma Pad *2 (1 Pre-Installed)
- First listed by seller: 3/24/25
If you are interested in more details, you can find full information on the seller's page.
Amazon live offers
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Top live offer is the offer currently shown first for this Amazon listing. It may differ from the lowest available price.
FBA means the order is fulfilled by Amazon, even when the seller is a third-party merchant.
Shippable means the offer is listed as available for delivery on Amazon.
New, Used and Refurbished describe the item condition shown for that Amazon offer.
Top live offer
$35.99
Free shipping
New
Sold by Amazon
FBA
Shippable
Used from
$15.39
Only from Used + Shippable live offers
Used offers
Used - Acceptable
· Third-party seller
· FBA · Shippable
$15.39
Used - Good
· Third-party seller
· FBA · Shippable
$15.55
Used - Very Good
· Third-party seller
· FBA · Shippable
$15.71
Used - Like New
· Third-party seller
· FBA · Shippable
$15.87
Offers updated: 6/1/26
Price History for seller Amazon
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Delivery to 
United States
United States
Available
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Dreo HM311
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| Brand | Dreo | chooone | LEVOIT | KZF | Dreo | Dreo |
| Model | HM311 | KC-C15-W2 | LUH-A251-WUS | DR-HHM004 | DR-HHM004 | |
| Color | ||||||
| Rating |
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| Price | $35.99 | $27.99 | $27.99 | $30.99 | $49.99 | $49.97 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | May 9, 2026 | May 16, 2026 | May 18, 2026 | Apr 17, 2026 | May 6, 2026 | May 29, 2026 |
| Shape | Oval | Rectangular | Round | Oval | Oval | |
| Voltage | 120 Volts | 120 Volts | 120 Volts (AC) | 120 Volts | 120 Volts | |
| Wattage | 26 Watt-hours | 140 watts | 17 watts | 26 Watt-hours | 26 Watt-hours | |
| Room Type | Office, Kids Room, Bedroom, Living Room, Nursery | Nursery | Office, Kids Room, Bedroom, Nursery | Office, Kids Room, Bedroom, Living Room, Nursery | Kids Room, Office, Bedroom, Living Room, Nursery | |
| Floor Area | 300 Square Feet | 750 Square Feet | 280 Square Feet | 500 Square Feet | 500 Square Feet | |
| Filter Type | Pre Filter | Demineralization Cartridge | Pre Filter | Pre Filter | Pre Filter | |
| Item Weight | 3.12 pounds | 3.48 pounds | 2.16 pounds | 3.87 pounds | 3.87 pounds | |
| Control Method | Touch | Touch | Touch | Touch | Touch | |
| Operation Mode | Ultrasonic | Ultrasonic | Ultrasonic | Ultrasonic | Ultrasonic | |
| Product Dimensions | 5.51"D x 11.02"W x 10.16"H | 7"D x 9.06"W x 12.2"H | 6.38"D x 7.12"W x 10.14"H | 5.91"D x 11.42"W x 12.4"H | 5.91"D x 11.42"W x 12.4"H | |
| Included Components | User Manual*1, Cleaning Guide*1, Cleaning Brush*1, Humidifier*1, Aroma Pad *2 (1 Pre-Installed) | humidifier*1 | User Manual*1, Cleaning Guide*1, Cleaning Brush*1, Humidifier*1, Aroma Pad *2 (1 Pre-Installed) | |||
| Special Feature | Timer, Low Water Indicator, Quiet, Auto Shut Off, Aroma Diffuser | Easy Top-Fill without turning over the water tank and spills, Quiet, No Light Disturbance, Easy Cleaning with big opening and base without nooks | Night Light, Adjustable Humidity Control, Easy Top-Fill, 28dB Ultra-Quiet Operation, Aroma Diffuser | |||
Dreo HM311
$35.99
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