Canopy humidifiers
Canopy has 2 units here, from $159 to $159, across one type. The most capable is the Canopy Bedside Humidifier 2.0 at 0.44 gal/day, enough for 108 sq ft. 2 of the 2 cannot produce white dust.
Across the lineup, Canopy's published room sizes average 4.6× what the output supports, so treat the square footage on the carton as a ceiling rather than a rating. How that is calculated.
Canopy sells cleanability, and on that promise it delivers better than anything else here: tank, tray, cap and grille all go in the dishwasher, the filter is on a 45-day clock the machine reminds you about, and because it evaporates rather than atomises there is no mist to land on anything. What $159 does not buy is capacity or control. There is no humidistat, and 2.5 litres across the advertised 36 hours is under half a gallon a day - a figure that supports something closer to 110 square feet than the 500 on the listing. As a nightstand appliance for one person's immediate airspace it is excellent. As the 500 sq ft room humidifier the marketing describes, it is not close.
108 sq ft supported · box says 500 sq ft
Mechanically the Bedside 2.0 with a different light and a sound machine tuned for a nursery, plus a baby-safe aroma kit rather than the adult one. The argument for it in a child's room is specific and good: no visible mist means nothing lands in a cot, no ultrasonic means no white dust in a room where a baby is breathing, and the dishwasher-safe parts mean the cleaning actually gets done at the interval it needs. The same capacity ceiling applies - this is one cot's worth of air, not a 500 sq ft nursery - and there is no humidistat to stop it when the room is where you want it.
108 sq ft supported · box says 500 sq ft