Dreo Top Fill 4L Supersized Cool Mist Humidifier
4.4Best price now
$39.99at WalmartObserved at 8:33 PM
20% under what the other stores charge
Compared across 6 stores. Prices are checked against each store and labelled with when.
20% under what the other stores charge
Compared across 6 stores. Prices are checked against each store and labelled with when.
The Dreo Top Fill 4L Supersized Cool Mist Humidifier is an ultrasonic room humidifier with a 4L top-fill tank, a built-in humidistat, auto mode, three speeds and app and voice assistant control. It is rated for rooms up to 300 ft² and runs at a claimed 28dB, with a touchscreen, timer, medicine cup and automatic shutoff. At $39.99 at Walmart as of November 3, 2026, it sits at the low end of its recent price range, making it one of the cheaper smart humidifiers per liter of tank capacity.
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Lowest price we've seen: $39.99 on Nov 4 at Walmart. Tracked across 9 stores since Nov 4.
With 4.4 out of 5 from about 1,500 ratings, owners generally report it does the basics well: easy top filling, quiet nights and steady humidity control for the money. Complaints tend to center on mist output at higher speeds and the upkeep an ultrasonic unit needs.
