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Side by side	DREO 4L Humidifiers for Bedroom, 36H Runtime, 28 dB Quiet, HM311Check price on Amazon	DREO 3L Humidifiers for Bedroom, 30H Runtime, 26 dB Quiet, New EditionCheck price on Amazon
Buyer rating	★★★★★4.4	★★★★★4.4
Price	$35.95	$29.91
Our score	8.5/10	8.4/10
Buyer ratings	17,664 ratings	8,354 ratings
Brand	DREO	DREO
Best for	Continuous overnight bedroom moisture on a budget	Sound-sensitive sleepers in small to mid-sized bedrooms
Moisture output	8.0/10	—
Acoustic performance	9.1/10	9.0/10
Ease of maintenance	8.6/10	—
Energy efficiency	8.8/10	—
Build and feature set	7.8/10	—
Humidification output	—	8.3/10
Design and usability	—	8.5/10
Maintenance demands	—	7.2/10
Value for money	—	8.9/10
Capacity	4 liters	3 liters
Voltage	120 volts	120 volts_of_alternating_current
Wattage	26 watt-hours	29 watts
Power Source	Corded Electric	Corded Electric
Item Dimensions D x W x H	5.51"D x 11.02"W x 10.16"H	7.68"D x 7.68"W x 10.24"H
Item Weight	3.1 pounds	2.6 pounds
Other Special Features of the Product	28dB Ultra-Quiet Operation, Adjustable Humidity Control, Aroma Diffuser, Easy Top-Fill, Night Light	Adjustable Humidity Control, Aroma Diffuser, Digital Display, Humidistat, Timer
Floor Area	300 square_feet	300 square_feet
Operation Mode	Ultrasonic	Ultrasonic
Room Type	Bedroom, Kids Room, Living Room, Nursery, Office	Bathroom, Bedroom, Living Room, Nursery, Office
Control Method	Touch	Touch
Filter Type	Pre Filter	Demineralization Cartridge
Runtime	36 hours	30 hours
Color	White	White
Item Shape	Oval	Round
Brand Name	DREO	DREO
Our verdict	Providing a 4-liter tank at a mid-thirty-dollar price point, this humidifier delivers sustained moisture for standard living quarters. The advertised 36-hour runtime is achievable only on the lowest mist output, so plan for realistic 12 to 16-hour intervals under moderate use. A 28dB sound profile keeps motor hum low enough for nightstand placement.	This 3-liter unit offers a middle ground between diminutive bedside tanks and large floor humidifiers. The 26dB rating ensures quiet performance for sound-sensitive environments, provided it is maintained to prevent gurgling. At thirty dollars, it represents a straightforward entry point for dry bedroom air.
Pros and cons	+ Four-liter tank handles multi-night low output + Quiet 28dB operational acoustic level + Competitive pricing relative to capacity − Maximum mist output rapidly depletes water volume − Internal corners require diligent regular hygiene	+ Very quiet 26dB nighttime operation + Three-liter reservoir balances size and runtime + Accessible entry-level pricing − Reaching 30 hours requires the lowest output setting − Requires consistent cleaning to prevent biological buildup

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