Airplus - 4L Ultrasonic Cool Mist Humidifier AP-S40A, Top Fill, 3 Mist Levels, 35dB Quiet Operation
Reviews coming soon
About this product
Bring gentle moisture and everyday comfort to your room with the AIRPLUS 4L ultrasonic humidifier. Designed for dry bedrooms, offices, and living spaces, it combines large mist output, three adjustable mist levels, quiet 35dB operation, and a convenient top-fill design. The transparent water tank makes water level checking easy, while the washable tank and wide opening help simplify routine cleaning. Whether used during sleep, work, or relaxation, this humidifier helps create a fresher and more comfortable indoor environment with less effort.
1. Large 4L Water Tank
The AIRPLUS AP-S40A humidifier features a 4L water tank, helping provide long-lasting humidification without frequent refilling. Its large-capacity design is suitable for daily indoor use in bedrooms, living rooms, offices, and other personal spaces where added moisture can improve comfort.
2. Ultrasonic Fine Mist Output
With an ultrasonic atomization system and mist output of at least 200mL/h, this humidifier helps quickly improve room humidity. The fine mist is designed to distribute more evenly, helping add moisture to dry air while maintaining a comfortable indoor environment.
3. Three Adjustable Mist Levels
This humidifier supports three mist levels: low, medium, and high. You can choose the output level based on the room condition or your personal comfort needs. The simple front control panel makes operation easy, with clear indicators for power and mist level selection.
4. Convenient Top-Fill Design
The top-fill structure allows water to be added directly from above, making daily refilling easier and more convenient. The large caliber design also helps simplify cleaning, while the washable water tank supports easier maintenance for regular household use.
5. Quiet 35dB Operation
Designed for quiet humidification, this model operates at about 35dB, making it suitable for nighttime use, bedrooms, work areas, and relaxing spaces. The soft mist output helps maintain comfort without creating disruptive noise during sleep, study, or daily routines.
- Maximum Recommended Room Size0 square feetApp CompatibleNoReservoir Capacity4 quartsHumidifier TypeUltrasonicLow-Water IndicatorNo
Reviews
This product doesn't have any reviews yet.
Compare similar products

Bring gentle moisture and everyday comfort to your room with the AIRPLUS 4L ultrasonic humidifier. Designed for dry bedrooms, offices, and living spaces, it combines large mist output, three adjustable mist levels, quiet 35dB operation, and a convenient top-fill design. The transparent water tank makes water level checking easy, while the washable tank and wide opening help simplify routine cleaning. Whether used during sleep, work, or relaxation, this humidifier helps create a fresher and more comfortable indoor environment with less effort.

The SU-4010 Dual Mist Humidifier is great for homes that like to choose and change their surroundings. The SU-4010 can convert from ultrasonic to steaming humidifier easily, with the switch of a button. There is a dual nozzle so that you can cover more space, up to 500 square feet of space to be exact. The SU-4010 is energy efficient and only uses the power of two light bulbs! The longer power cord allows you to put the humidity where you want it, as do the adjustable nozzles. The SU-4010 features an ION exchanger and will demineralize our water to remove calcium and magnesium from your hard water, preventing white dust particles from depositing in your air.

Get relief from cold and flu symptoms and bring wellness to your entire family in style with a Crane top fill Drop humidifier with sound machine. With an award winning design & top rated performance, Crane’s 1.0 Gal. top fill Drop ultrasonic cool mist humidifiers provide up to 500 sq. ft. of coverage and 24-hours of soothing moisture to help relieve the effects of dryness and congestion. Use with Crane’s vapor pads (HS-1950 & HS-1950L) for an elevated experience to help you and your family breathe easy and sleep through the night peacefully.

Comfortable air not only feels good, but it's also good for you. That's where this humidifier comes in. Engineered by Perfect Aire, this 1.05-gallon top-fill humidifier quietly disperses an ultra-fine, cool mist powered by our exclusive ultrasonic cool mist technology, humidifying medium to large-sized rooms. What does this mean to you? Relief from dry skin and allergy symptoms, plus an extra defense against airborne illnesses. Need more reasons to love this humidifier. This unit features a 7 color nightlight and allows essential oils to be added directly to the tank, just add your favorite scent and let your room fill with soothing scents and smells.
Specs
Be the first to ask a question.
We’ll try to get your question answered within 24 hours by a Best Buy customer or brand representative.



