The Best Ultrasonic Humidifiers for Cool Mist and Comfort

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The wintertime can not only bring cold temperatures but dry air as well. Dry air can have unbearable effects on your body, such as nose bleeds, flaky skin, and difficulty breathing. Fortunately, there are many benefits that a humidifier provides. Using an ultrasonic humidifier can help alleviate many issues by adding moisture to the air in your home.

List of the Best Ultrasonic Humidifiers

Preview

Product

Summary

Link

Homech Cool Mist Humidifier

Best All-Around Ultrasonic Humidifier

  • 4L tank

  • 2ft mist height

  • Auto-shutoff

  • Fills from top

Pure MistAire Ultrasonic Humidifier

Best Ultrasonic Humidifier for Small Rooms

  • 1.5L tank

  • Night-light

  • Auto-shutoff

LEVOIT Ultrasonic Humidifier

Best Ultrasonic Humidifier for Large rooms

  • 6L tank

  • Humidistat

  • Remote control

  • Auto-shutoff timer

Miroco Cool Mist Humidifier

  • 6L tank

  • Visible water gauge

  • Night-light

  • Auto-shutoff

raydrop Cool Mist Humidifier

  • 2.5L tank

  • Translucent tank for monitoring water level

  • Fills from top

What is an Ultrasonic Humidifier?

An ultrasonic humidifier is a device that adds moisture to the air. It is used inside of homes when the air is dry, such as during the wintertime. By adding moisture throughout a space, they keep your home comfortable even when the weather is cold and dry.

With a comfortable level of humidity inside your home breathing becomes easier, and skin does not dry out.

Ultrasonic humidifiers are able to add moisture to the air without the use of heat, so they are safer to use than evaporative humidifiers.

How does an Ultrasonic Humidifier Work?

Ultrasonic humidifiers work a bit differently than evaporative humidifiers. They work by converting water into a fine mist by means of high-frequency vibrations. The fine mist produced by the vibrations is blown into the air by a fan. Once the mist is propelled out of the humidifier, it evaporates and adds humidity to the air in the space.

Ultrasonic humidifiers have a tank that must be filled with water for it to work. A tank of water will last from a few hours to a few days, depending on how much you use the dehumidifier.

Ultrasonic humidifiers also have an adjustment knob that allows you to control the amount of moisture that you add to the air. Some ultrasonic humidifiers also have a humidistat that allows for fine-tuning of the humidity level in a room.

How to Choose an Ultrasonic Humidifier

Choosing an ultrasonic humidifier largely depends on the type of room that you need to humidify. A large open office will require a large humidifier to satisfy the room’s humidification requirements.

It should be noted that bigger is not always better, and the performance of your humidifier will depend on many factors such as temperature, pressure, and relative humidity levels. A better way to select the humidifier that you need is by the size of the reservoir, or tank.

If you will be using the humidifier in a large space, you will want a humidifier with a large tank. This may sound obvious, but you’ll want to ensure that you don’t have to refill the humidifier’s tank multiple times a day.

Likewise, if you will be humidifying a small room, then you can get a humidifier with a small tank. This will let you save a bit on your purchase, and the humidifier won’t take up as much space in your small room.

Another thing to consider when choosing an ultrasonic humidifier is whether the humidifier has a filter. A filter will aid in removing dissolved minerals from the water as the humidifier runs. The result will be cleaner air and less “humidifier dust” buildup inside your home. If you will be running your humidifier constantly, consider purchasing a humidifier with a filter to improve air quality inside your home. The downside is that you’ll have to periodically change the filter, and that can add to the costs of using the humidifier.

If your humidifier does not have a filter, it’s a good idea to use distilled water instead of plain tap water when filling up your humidifier’s reservoir. Distilled water has been treated to remove most minerals and dissolved solids, so you’ll have less dust in your air.

Some ultrasonic humidifiers have additional features that others do not have. These additional features can make or break its usefulness for your situation.

One of the best features to have in an ultrasonic humidifier is a humidistat. A humidistat allows you to dial in the precise amount of humidity that you desire in a space. The humidistat works by sensing the humidity inside of a room and adjusting the humidifier’s output to maintain a precise humidity level. The result is accurate control of humidity levels, so it is never too wet or too dry inside of your room.

Another important feature is an automatic shutoff. The automatic shutoff works by automatically turning off the humidifier when the tank runs out of water. This is an important feature because running your humidifier without water may damage the humidifier. Automatic shutoff is a standard feature in most ultrasonic humidifiers.

One other feature that some ultrasonic humidifiers have is an additional compartment for aromatherapy oils. This is a great feature if you want to diffuse aromatherapy or essential oils into your air – then your humidifier can do that for you.

Reviews of the Best Ultrasonic Humidifiers

Homech Cool Mist HumidifierThe Homech Cool Mist Humidifier is the best all-around ultrasonic humidifier. First of all, it has an adjustable output that allows you to dial in the amount of humidity that you want it to distribute. It also has a decently sized 4-liter tank for long operation.

There are a few things that make this humidifier stand out from the others. For one, it discharges mist at a 2-foot height – so you won’t get your desk or table wet. It also has a carrying handle for easy transport.

Perhaps the most underrated feature is that it fills from the top. Having a top-filling humidifier is important for a couple of reasons. First, it allows you to leave the humidifier in one place and simply bring a pitcher of water when you need to refill it. You also don’t need to fumble with removing a tank and bringing it to the sink every time you need to fill it up.

Pros

Cons

Bottom Line

The Homech Cool Mist Humidifier is the best all-around ultrasonic humidifier since it performs well and is very easy to use and maintain. It does its job right and is a set-it-and-forget-it kind of device.

Pure MistAire Ultrasonic HumidifierThe Pure MistAire Ultrasonic Humidifier is a compact humidifier that is suited for use in small areas such as bedrooms or home offices. It is a no-frills device that is great for overnight use since it has whisper quiet operation.

Our favorite feature about this humidifier is that it includes a built-in night light that is perfect for illuminating a dark room before bed or setting the mood. Cleaning this humidifier is easy since it disassembles into a few parts and includes a cleaning brush.

Filling up the Pure MistAire Ultrasonic Humidifier is simple – just remove the tank, remove the cap, and fill it up with water in your bathroom or kitchen sink. With a full tank, this humidifier will operate continuously for up to 16 hours.

Pros

Cons

Bottom Line

The Pure MistAire Ultrasonic Humidifier is ideal for humidifying small spaces. It’s quiet operation is suited for bedrooms and offices.

LEVOIT Ultrasonic HumidifierThe LEVOIT Ultrasonic Humidifier is the biggest humidifier in our roundup and packs the most features by far. First of all, it is capable of humidifying large rooms – spaces up to 753 square feet, or about 27’x27’.

Better yet, this is the only humidifier in our roundup that has a built-in humidistat. With the humidity sensor, you’ll be able to dial in the precise amount of humidity that you desire in a space. Then the humidifier will automatically adjust its mist level to maintain your desired humidity.

Besides being able to disperse a cool mist, this humidifier is also able to disperse a warm mist as well. By using the warm mist setting, you can relieve symptoms brought on by dry air in the cold winter months. The warm mist setting also allows for greater moisture output for humidifying the largest of spaces.

This humidifier includes some convenience features as well. First, it has a remote control. You’ll be able to conveniently adjust the humidity settings without leaving your couch. You can also use the remote to set a timer so you don’t accidentally forget to turn the humidifier off.

If you enjoy aromatherapy, this humidifier also has an aromatherapy tray so you can add some of your favorite oils to disperse throughout your home.

Pros

Cons

Bottom Line

The LEVOIT Ultrasonic Humidifier is the full-featured ultrasonic humidifier that has everything you need and more. While it’s designed for humidifying large spaces, it can work just as well in small spaces since it will automatically adjust mist levels with its included humidistat.

Miroco Cool Mist HumidifierThe Miroco Cool Mist Humidifier has an extra-large 6L tank that allows for continuous operation for up to 60 hours. This humidifier is best suited for medium-sized rooms up to 430 sq ft. But don’t let its size fool you – it has an adjustable output knob that allows you to dial it down for use in small rooms such as bedrooms.

Speaking of bedrooms, this humidifier is one of the quietest ones in our roundup – with a noise level of only 26dB. It even includes a night light, which makes it an even more attractive option for night owls.

The removable tank on this humidifier has an extra-large opening that makes it easy to fill up and clean when the time comes.

Pros

Cons

Bottom Line

The Miroco Cool Mist Humidifier is best suited for those that desire continuous, long-lasting operation. Its large 6L tank allows for up to 60 hours of use – that’s 2 ½ days of continuous non-stop operation.

raydrop Cool Mist HumidifierThe raydrop Cool Mist Humidifier is a small humidifier with a large tank for continuous operation. It has a 2.5L tank that can last up to 30 hours on the lowest mist setting.

Since this humidifier has a small footprint, it is suited well for small rooms where there is not much space.

One of our favorite features of this humidifier is that it fills up from the top. Simply remove the lid and fill it up with distilled water and it’s ready to go. That means you don’t have to fumble around with removing a tank and bringing it to the sink.

If you enjoy the scent of aromatherapy or essential oils, you can add the oils directly to the water in the tank. Since the tank is translucent, you can also monitor the water level inside the tank visually.

Pros

Cons

Bottom Line

The raydrop Cool Mist Humidifier is best suited for humidifying small areas for long periods of time. It can last up to 30 hours on a single tank and will automatically shut off when it’s out of water. With its adjustable dial, you’ll be able to dial in how much mist you want the humidifier to discharge into your room.

Ultrasonic Humidifier Comparison Table

Tank Size:

4L

1.5L

6L

6L

2.5L

Humidity Output:

60-300 mL/hr

150 mL/hr

Up to 300mL/hr (Cold mist)

Up to 500mL/hr (Warm mist)

60-300 mL/hr

180 mL/hr

Room Size:

215-430 sqft

250 sqft

Up to 753 sqft

215-430 sqft

300 sqft

Humidistat:

No

No

Yes

No

No

Aromatherapy Tray:

No

No

Yes

No

Yes

Night Light:

No

Yes

No

Yes

No

Benefits of Using an Ultrasonic Humidifier

Ultrasonic humidifiers offer many benefits over using a plain old evaporative humidifier:

  • Whisper quiet. Ultrasonic humidifiers have much smaller fans than evaporative humidifiers, so they are much quieter. However, they still do make a small amount of noise, so take note if you will be using it in a quiet area, such as a living room or bedroom.

  • No filter required. Most Ultrasonic humidifiers don’t have any filters so you won’t need to worry about changing filters. However, some ultrasonic humidifiers do include filters (more on this below).

  • Easy to clean. The operating principle of ultrasonic humidifiers is relatively simple. This means that there is less complexity and fewer parts to clean.

  • Cool mist. Since ultrasonic humidifiers work by high-frequency vibrations, there is no heating element inside of them. This means that there is no risk of burns when touching an ultrasonic humidifier. This is great for families with children.

  • Less energy consumption. Ultrasonic humidifiers consume very little electricity compared to their evaporative counterparts. This means that you’ll save money on your electric bill.

How to Clean an Ultrasonic Humidifier

Even though ultrasonic humidifiers don’t heat water, they still need to be cleaned. Dissolved minerals are present in all tap water, and can scale up the interior of your humidifier. You will need to clean your humidifier at least every 3 days, and even more often if you run it constantly.

Since ultrasonic humidifiers are relatively simpler machines than their evaporative counterparts, cleaning them is quite simple. The main goal of cleaning a humidifier is to remove any scale or mineral buildup. To clean your ultrasonic humidifier, follow these steps:

  1. Turn off and unplug the humidifier.

  2. Disassemble the humidifier. Remove the tank from the basin and drain both completely.

  3. Fill the tank half full with warm water. Add two (2) tablespoons of white vinegar. Shake or stir the tank to allow the water-vinegar solution to clean the interior of the tank.

  4. Add warm water to the basin, but not too much to allow the basin to overflow. Add two (2) tablespoons of white vinegar to the basin. Stir the water-vinegar solution to clean the basin.

  5. Allow the tank and basin to soak with the water-vinegar solution. Periodically stir or shake to allow the solution to clean and disinfect the humidifier parts.

  6. Use a soft nylon brush to scrub off any stubborn mineral buildup. Be careful not to damage any parts.

  7. After allowing the tank and basin to soak for about 30 minutes, empty the cleaning solution out of them. Rinse the tank and basin with clean water and dry it with a paper towel. Note: do not let any of the electronic components to get wet, such as the power cord.