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3L Top Fill Ultrasonic Cool Mist Humidifier

3L Top Fill Ultrasonic Cool Mist Humidifier

Best price now

$69.99at WalmartObserved at 8:25 PM

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Our take on the 3L Top Fill Ultrasonic Cool Mist Humidifier

A 0.8-gallon (3-liter) ultrasonic humidifier that fills from the top and runs up to 12 hours on one tank, rated for rooms up to 320 sq ft. It puts out cool mist at a quiet 35 dB, so it suits a bedroom or office. It runs on 24 V corded power and is listed for both home and commercial use. The best new price is $69.99 at Walmart as of November 4, 2026, and only one store lists it new, so there is no recent price range to compare against.

Best forBedrooms and nurseries where quiet mattersRooms up to about 320 sq ftPeople who want top-fill refills without lifting the tankSmall offices or waiting areas
Pros
  • Top-fill design makes refilling and cleaning easier
  • 35 dB is quiet enough for sleep
  • Up to 12 hours of runtime per fill
  • Compact footprint at about 7.3 in wide
  • Works for home or light commercial use
Cons
  • No NRTL safety listing, which some buyers and insurers require
  • 24 V power means a specific adapter, not a standard plug
  • 12-hour runtime assumes low output; high mist shortens it
  • Only one store lists it new, so price competition is thin
  • No smart controls or humidity sensor mentioned

3L Top Fill Ultrasonic Cool Mist Humidifier prices at every store

  • WalmartNew

    In stockSold by Amumu Direct

    $69.99Observed at 8:25 PM
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3L Top Fill Ultrasonic Cool Mist Humidifier price history

Lowest price we've seen: $69.99 on Nov 4 at Walmart. Tracked across 1 store since Nov 4.

Specifications

Humidification Method
Ultrasonic
Coverage Area
320 sq ft
Run Time
12 hr
Volume Capacity
0.8 gal
Dispensing Temperature
Cool Mist
Decibel Rating
35 dB
Humidifier Type
Humidifier
Power Type
Corded Electric
Rec. Use
Commercial, Residential
Dimensions
7.28 x 7.28 x 11.02 in
Has Nrtl Listing Certification
N
Volts
24 V

Questions and answers

Is $69.99 a good price for this humidifier?
It is the only new price listed, $69.99 at Walmart as of November 4, 2026, so there is no recent range to judge against. Comparable 3-liter top-fill ultrasonic units often sell for $40 to $80, so it sits in the middle of that band.
How long does the tank last?
Up to 12 hours per fill, per the specs. That figure assumes a low mist setting; running it high will empty the 0.8-gallon tank sooner.
What size room will it handle?
It is rated for up to 320 sq ft, which covers a typical bedroom, nursery or small office. Larger open rooms will need more than one unit or a higher-output model.
Is it quiet enough for a bedroom?
Yes. It is rated at 35 dB, about the level of a soft whisper, so most people will not notice it at night.
Does it need special water or filters?
Ultrasonic cool-mist units like this generally need no filter, but distilled or filtered water reduces white dust from minerals. No filter is listed in the specs.
What is in the box?
The listing does not detail the box contents. Expect the humidifier and a 24 V power adapter; check the listing before ordering if the adapter matters to you.
Where is the 3L Top Fill Ultrasonic Cool Mist Humidifier cheapest?
At Walmart, for $69.99, as of our latest check.