Humidifiers / Ultrasonic
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Ultrasonic Humidifiers

Updated 2026-11-03

High-frequency vibrations create a fine cool mist for quiet and efficient operation 109 humidifiers · 73 brands

For bedrooms Cool mist Mini Quiet With night lights With auto shut-off For plants Top fill USB Ultrasonic Car For baby nurseries Travel With aroma diffusers White 6 liter and larger Affordable With timers For kids 2 to 3 liter Black Smart Whole house 1 gallon 4 to 5 liter With remote controls Warm mist Blue Evaporative Rechargeable Pink Green Wood grain For women Flame effect Tower Gray Brown Mushroom and rain cloud

Best Ultrasonic Humidifiers

# Model Band Label Specs See deal
1 NaturalCare Cool Mist Ultrasonic Mini Humidifier 9.0 Vicks NaturalCare Cool Mist Ultrasonic Mini Humidifier $39.97 Vicks For bedrooms · Cool mist · Mini
$39.97 See deal
2 Ultrasonic Cool Mist Bedroom Humidifier 9.2 LEVOIT Ultrasonic Cool Mist Bedroom Humidifier $39.99 LEVOIT For bedrooms · Cool mist · Top fill
$39.99 See deal
3 Two Pack Ultrasonic Top Fill Office Humidifiers 9.1 MEGAWISE Two Pack Ultrasonic Top Fill Office Humidifiers $36.44 MEGAWISE Cool mist · Quiet · With night lights
$36.44 See deal
4 Ultrasonic Ebony Quiet 4L Humidifier 9.2 Dreo Ultrasonic Ebony Quiet 4L Humidifier $33.99 Dreo For bedrooms · Quiet · 4 to 5 liter
$33.99 See deal
5 Ultrasonic humidifier with extension tube and light 9.3 LACIDOLL Ultrasonic humidifier with extension tube and light $136 LACIDOLL For bedrooms · With night lights · For plants
$136 See deal
6 Black Mini Ultrasonic Cool Mist Humidifier 9.0 Rosekm Black Mini Ultrasonic Cool Mist Humidifier $21.99 Rosekm Black · For bedrooms · Cool mist
$21.99 See deal
7 Top Fill Ultrasonic Humidifier with 0.97 Gallon Tank 8.8 Homedics Top Fill Ultrasonic Humidifier with 0.97 Gallon Tank $58.99 Homedics For bedrooms · Top fill · 2 to 3 liter
$58.99 See deal
8 Orange Ultrasonic Cool Mist Humidifier 1 Gallon 9.0 Crane Orange Ultrasonic Cool Mist Humidifier 1 Gallon $51.77 Crane For bedrooms · Cool mist · For plants
$51.77 See deal
9 PureBaby Ultrasonic Nursery Mist Humidifier 8.9 Pure Enrichment PureBaby Ultrasonic Nursery Mist Humidifier $39.99 Pure Enrichment For bedrooms · Cool mist · With night lights
$39.99 See deal
10 Large ultrasonic easy clean bedroom humidifier 8.5 Akeshan Large ultrasonic easy clean bedroom humidifier $69.99 Akeshan For bedrooms · For plants · Top fill
$69.99 See deal

What the mist feels like

An ultrasonic humidifier uses high-frequency vibration to break water into a fine, cool mist. That mist leaves the unit at room temperature, so it will not warm the air around a bed or desk. The tanks in the selection run from small bedside sizes up to larger floor units, with capacities like 2L, 3.5L, 6L, and 9L.

Tank sizes and how they fit a room

The smaller tanks, around 2L to 3.5L, suit a nightstand or a single desk and typically run through a night. Mid-size tanks near 4L to 6L cover a bedroom or a small living area, and the larger 8L to 15L tanks are meant for open rooms where you want fewer refills.

A top-fill design matters more as the tank grows, since lifting a full 6L or 9L tank to a sink is awkward. Some units also add an essential oil diffuser or a night light, which changes the bedside routine but not the mist itself. Color choices are mostly neutral, with a few blue and green options.

See also
For bedrooms Cool mist Quiet With auto shut-off For baby nurseries With night lights For plants Top fill
Quick answers

Ultrasonic questions

Does an ultrasonic humidifier make the room feel cold?

No, it releases a cool mist at room temperature, not chilled air.

How often do I refill a 3.5L ultrasonic humidifier?

A 3.5L tank is often described as lasting up to 40 hours on low.

Can I add essential oils to an ultrasonic humidifier?

Some units include a diffuser tray, but not all of them do.

Is top-fill easier than bottom-fill?

Yes, you pour water into the top instead of carrying and flipping the tank.