Tank capacity is not room coverage
Tank size mostly determines how often the unit needs a refill. Real humidity change also depends on mist output, room size, ventilation, and starting humidity. A desktop humidifier is generally strongest in the nearby personal area.
Noise and protection shape nighttime use
For a bedside unit, compare operating noise, whether indicator lights can be reduced, and whether waterless shutoff is included. Do not point mist directly at bedding, walls, wood furniture, outlets, or electronics.
Easy cleaning matters every week
A wide, reachable tank opening makes wiping and descaling easier. Replace water regularly and empty the unit before storage. Ambient lighting never removes the need for routine water hygiene.
Common question
Can a desktop humidifier cover a large bedroom?
It is usually intended for the nearby personal area. Whole-room results depend on output, room size, and ventilation and should be judged with stated coverage and a hygrometer.