Best Warm Mist Humidifiers of 2021

Warm and humidify your home at once.

Humidifiers add moisture to the air so you can avoid the dryness of a cold climate. Do you experience rough lips or skin, or struggle with sinus congestion? If you suffer from any of these symptoms, humidifiers could be the answer.

Warm mist humidifiers have the extra benefit of warming up your home. They combine the seemingly magical properties of water and heat in the atmosphere. If you haven’t considered investing in one of these units, perhaps now’s the time to start looking?

This is where we come in and guide you through everything there is to know about the best warm mist humidifiers. We will help you work your way through our list of the most popular options on the market right now.

Our Top Picks

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Compare the Best
Product Image of the TTLIFE 6L Warm and Cool Mist Humidifiers for Large Room Baby Bedroom, Humidifiers with Remote, Essential Oil, Customized Humidity, LED Touch Display, for Your Family
Safest Humidifier
TTLife Ultrasonic Humidifier
  • Has a sleep mode
  • Rotating nozzle
  • Built-in ionic generator
Product Image of the LEVOIT Humidifiers for Large Room Bedroom (6L), Warm and Cool Mist Ultrasonic Air Vaporizer for Home Whole House Babies, Customized Humidity, Remote Control, Whisper-Quiet, White
Best Large Humidifier
Levoit LV 600HH Ultrasonic
  • Remote-controlled
  • Large tank capacity
  • Mist settings
Product Image of the Rowenta HU5120 Intense Aqua Control Whole Room Mist Humidifier Ultrasonic Technology with Unique Baby Mode, 1.5-Gal, Bronze
Fastest Humidifier
Rowenta HU5120 Whole Room
  • Three automatic modes
  • Warm mist
  • Practical
Product Image of the Honeywell HWM-705B HWM705B Filter Free Warm Moisture Humidifier, Black
Most Affordable Humidifier
Honeywell HWM705B Filter Free
  • Affordable
  • Easy control
  • Breezy cleaning
Product Image of the Crane Drop Ultrasonic Cool Mist Humidifier, Filter Free, 1 Gallon, 500 Sq Ft Coverage, Air Humidifier for Plants Home Bedroom Baby Nursery and Office, Aqua
Cleanest Humidifier
Crane Cool Mist Humidifier
  • Soothing mist
  • Clean control
  • 360-degree mist lid

What Is a Warm Mist Humidifier Used For?

Warm mist humidifiers simply boil water and then release it as warm steam, which increases the humidity. The main benefits of these popular units are:

  • Healthy: Warm mist humidifiers are considered as beneficial to our health due to the boiling process killing bacteria. They also give you a better chance for a clear airway (1).
  • Quiet: Not having a fan inside warm mist humidifiers means they operate quietly. This makes them ideal for peaceful humidification and night-time use.
  • Size: Unlike cool mist humidifiers, warm mist humidifiers are smaller and thus, more suitable for small spaces like your bedroom or office.

Take Note

Warm mist humidifiers should be used with caution due to the presence of boiling water. Keep your warm mist humidifier away from pets, children and the elderly.

Finding the Best Warm Mist Humidifier

With all the advantages of warm mist humidifiers, you still need to factor in certain aspects before committing. Consider the following points:

Home Size and Coverage Capacity

To decide on a mist humidifier, first measure the square footage of your space. Bear in mind that too much moisture can breed more bacteria and mold, and you need an ideal humidity level of between 30 and 50 percent (2). Getting a product that’s too big for the space you’re humidifying will create too much moisture.

It’s fruitless buying a product that won’t cover your entire home. In contrast, you don’t want those high humidity levels by getting a model that’s too overbearing. With this in mind, only get a product suited to your home’s footprint.

Output Levels

Strike a balance between the space you need humidifying and the output level of the unit. For example, if your space is 400 square feet, it’s no use getting a model that has a low output level over 24 hours. You need that moisture hitting the entire area as quickly as possible.

Most reasonably priced humidifiers are capable of handling rooms of approximately 200 to 500 square feet. The more expensive ones can do double the work, but do you need that?

Cleaning and Maintenance

The humidifier’s role is to assist you in living a healthier life, but the last thing you want is to have to maintain the unit constantly. It’s supposed to make your life easier, not bring more hassle.

So, give good consideration to the shape, filter, tank size, and the entrance to the water tank or the filter. Our research showed us that many users complained how narrow the tank entrance was, making refilling their unit a real pain.

Take Note

Another challenging part to clean is the tube. Some humidifiers have an auto-cleaning feature that removes remaining moisture by itself. If not, a long, thin brush is required to do this job.

The Best Warm Mist Humidifiers of 2021

Choosing the best warm humidifiers demanded a lot of research. We piled hours into this, combining industry trends, user reviews and our own knowledge and experience.

These are the top warm mist humidifiers on the market:

1. TTLife Ultrasonic Warm Mist Humidifier

Safest Warm Mist Humidifier

This popular ultrasonic warm mist humidifier provides you with a strong capacity of 1.45 gallons.

It’s reported that this capacity allows it to run continually for 40 hours, so you won’t need to refill it constantly.

There’s a clear focus on health and safety with this model. It’s made from BPA-free plastic, has a built-in resin filter and can soften hard water.

Why We Love It

Sleep Mode

The sleep mode is really handy for generating a mist in the night with the LED light switched off. This makes it an excellent choice for light sleepers and little ones.

It combines well with the aromatherapy option. You can add essential oils to the aroma box for a calm and pleasant aroma during the night — or day, of course.

Rotating Nozzle

Dual 360-degree rotatable nozzles are also included in the model. They spread the mist in all directions with a speed of 550 ml/hour, thus humidifying all parts of your room.

Built-In Ionic Generator

This humidifier purifies the air and releases fresh air into your space. Thanks to the special integrated ionic generator, you and your family can breathe better. You can also enjoy a healthier life by preventing secondary pollution.

Keep In Mind

Disturbing Noise

Due to the automatic humidity sensor, users report that the machine automatically activates and is disabled every couple of minutes. This creates an annoying noise disturbance.

Additional Specs

Working Hours Up to 40 hours
Tank Capacity 1.45 gallons
Max. Mist Output Up to 550ml per hour
Dimensions 24.8 x 19.7 x 15 inches
Room Coverage 430 to 753 square feet

2. Levoit LV 600HH Hybrid Ultrasonic Humidifier

Best Large Warm Mist Humidifier

If you’re willing to pay a little more money for some amazing extras, the Levoit LV 600HH Warm Mist Humidifier is just made for you.

Levoit is a well-known and respected brand in the humidifier market. This model is especially crafted for large spaces as it releases 500ml of moisture per hour. With that, you can definitely reach the targeted humidity in no time compared to other humidifiers.

The manufacturer also didn’t miss out on adding an essential oil tray. So, now you can add your favorite scent to your room to enjoy the calm, humidified atmosphere.

Why We Love It

Extra Options

Levoit has taken humidifier technology to the next level by adding a remote control to the device. This allows you to control the unit without disturbing your comfy lounge position.

Besides, its humidity sensor gives you the chance to control the desired humidity level. There’s also an automatic shutdown option once the humidity reaches your preferred level.

Large Tank Capacity

Unlike most humidifiers, Levoit has a water tank capacity of 1.5 gallons, which allows it to work up to 36 hours non-stop. This should make your life easier since you won’t have to worry about refilling it in the middle of the night.

Mist Settings

This machine gives you the two mist settings to enjoy all through the year:

  • Cool mist: Recommended in the summer to protect unmoisturized skin and hair from the summer heat.
  • Warm mist: Great for easing cold symptoms.

Keep In Mind


With all the advantages of this Levoit unit, it has a reported problem of releasing extra moisture in the vicinity. To counter this, place it on a towel and keep it away from anything that could be damaged by water — especially electrical equipment.

Additional Specs

Working Time 12 to 36 hours
Tank Capacity 1.5 gallons
Max. Mist Output Not specified
Dimensions 11.3 x 7 x 10.5 inches
Room Coverage Up to 753 square ft

3. Rowenta HU5120 Whole Room Mist Humidifier

Fastest Warm Mist Humidifier

Get the job done with the Rowenta HU5120 Whole Room Mist Humidifier. It produces two gallons per day, but if you put it on the warm mist setting, this is sped up by 20%.

This machine can run for 24 hours so you can turn it on, relax and let it do its thing without a worry. Plus, the warm mist is bacteria-free so you can rest assured this is safe to use in your home.

Why We Love It

Three Automatic Modes

You can manually adjust the settings, but there are three automatic modes. The main automatic mode sets the humidity level at 55%. The machine adjusts its speed depending on the humidity level in the room.

The baby mode sets the humidity level to 50%, also automatically adjusting its speed depending on the room’s humidity level. It stops automatically after seven hours.

Lastly, night mode sets the humidity level to 50% and gradually reduces its speed throughout the night, before stopping after eight hours.

Warm Mist

The warm mist is great. First, it speeds up the unit by 20% for quicker results. But it also ensures 100% bacteria free mist. The water is heated to 95°Fahrenheit but on dispersal, it is cooler because the fine mist doesn’t stay too hot.

Warm mist is ideal for releasing clean air, rather than physically warming up a room. But during the winter months, it’s nice to sit next to as it does offer some warmth.


If you need something quiet — this is a great option. It only reaches 40 decibels, so it’s whisper quiet. It also offers 360 degrees steam diffusion ensuring all corners of a room are affected. Lastly, it’s very easy to maintain and clean. There are three short steps to cleaning the tank. All information can be found in the manufacturer’s guide.

Keep In Mind

Needs Reset

This unit doesn’t have a memory option. So when you have found your favorite settings, you need to memorize them because the machine won’t do it for you. This isn’t the most convenient feature, as it would be much nicer if the unit could remember your preferred settings.

Cleaning It

Although it’s easy to clean this machine, it does require frequent cleaning. The manufacturer guide suggests cleaning it every other day. While this will prolong the lifespan of the appliance, ask yourself if you have time for this as many families won’t.

Additional Specs

Working Time Up to 24 hours
Tank Capacity 1.5 gallon
Max. Mist Output 2 gallons per 24 hours
Dimensions 9.84 x 9.84 x 16 inches
Room Coverage Up to 500 sq. ft.

4. Honeywell HWM705B Filter Free Warm Moisture Humidifier

Most Affordable Warm Mist Humidifier

This Honeywell product is our ideal humidifier for small to medium rooms and is incredibly affordable.

It brings a soothing, warm mist to your home to give you more comfortable breathing.

We love that the provided medicine cup can be used in conjunction with essential oils for aromatherapy and adding a nice smell to the atmosphere.

Why We Love It


HMW705B is not only saving your money because of its price. It’s also energy-efficient and will keep your electricity bill low. Also, being filter-free saves ongoing filter replacement costs.

Easy Control

One of its added benefits is having a low water indicator, which will save you the worry of when to refill it. We love its 1-gallon capacity and the automatic turn-off system. With those, you can go through the entire night knowing that your unit is working away.

Breezy Cleaning

Due to its accessible parts, it’s easily cleaned and refilled. Just soak the machine for about 15 minutes in vinegar, and dust off the device with a brush.

Keep In Mind

Not the Quietest

Users report that the boiling noise can be frustrating. However, the good news is that once the water has boiled, the unit operates quietly for a comfortable atmosphere.

Additional Specs

Working Time Up to 24 hours
Tank Capacity 1 gallon
Max. Mist Output 1 gallon per 24 hours
Dimensions 12 x 10 x 6.2 inches
Room Coverage Up to 250 sq. ft.

5. Crane Ultrasonic Cool Mist Humidifier

Cleanest Warm Mist Humidifier

This Crane model is mainly popular due to its being antimicrobial.

A runtime of up to 24 hours means there’s less frequent maintenance to be done.

A humidifier shouldn’t replace healthy eating and drinking water for helping with cold and flu symptoms.

Nonetheless, this model reportedly assists when you’re ill.

Why We Love It

Soothing Mist

For when you have a cold, this Crane model can run for up to 24 hours. This is ideal for a consistent and soothing warm mist to alleviate some cold symptoms.

Clean Control

An antimicrobial protection system with silver particles coats this humidifier’s body. This prevents the spreading of mold and bacteria, which can be common in humidifiers due to the presence of moisture.

360-Degree Mist Lid

Equipped with a 360-degree lid, this humidifier ensures that not a single place in your vicinity is left without getting the benefits of a humidifier. It can cover as big as 500 square feet of room.

Keep In Mind

Single Mist Setting

The only drawback of this product is that you cannot alternate between the warm and cold mist setting to suit your specific needs at any time.

Additional Specs

Working Hours Up to 24 hours
Tank Capacity 1 gallon
Max Mist Output 1 gallon per 24 hours
Dimensions 8.6 x 13.4 x 8.6 inches
Room Coverage Up to 500 sq. ft.

Warm Mist Humidifier Comparison Chart

Product Best Working Hours Tank Capacity Max. Mist Output Dimensions Room Coverage
TTLife Ultrasonic Humidifier Safest 40 hours 1.45 gal. 550ml/h 24.8 x 19.7 x 15″ 430 to 753 sq ft
Levoit LV 600HH Ultrasonic Humidifier Large 12 to 36 hours 1.5 gal. N/A 11.3 x 7 x 10.5″ 753 sq ft
Rowenta HU5120 Whole Room Fastest 24 hours 1.5 gal. 2 gal/day 9.84 x 9.84 x 16″ 500 sq. ft.
Honeywell HWM705B Humidifier Affordable 24 hours 1 gal. 1 gal/day 12 x 10 x 6.2″ 250 sq. ft.
Crane Ultrasonic Cool Mist Cleanest 24 hours 1 gal. 1 gal/day 8.6 x 13.4 x 8.6″ 500 sq. ft.

Becoming a Warm Mist Humidifier Fan

With the best warm mist humidifier at home, you can have a range of health advantages and withstand all those days of cold, low humidity. They are as affordable and efficient as cool mist humidifiers to add humidity to the air.

Before deciding on a model, make sure to measure the space you need humidifying. We know first hand how frustrating it is to invest in a product and have it not suit your needs.

Think about the extras that come with the humidifier and how that will fit into your needs. Do you have small children in the home? If so, consider whether it has a nighttime setting. Don’t forget to locate it out of reach — warm mist humidifiers have hot working elements.

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About the Author

Matthew Sullivan

Matthew is a freelance writer with several years of experience in DIY and HVAC. For as long as he can remember, Matthew has always found great pleasure in taking things apart and learning how to put them back together.
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