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Best Warm Mist Humidifiers of 2021

Updated
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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Model
Product Comparison Table
Features

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 Bedroom Large Room 6L Warm and Cool Mist for Families Plants with Built-in Humidity Sensor, Essential Oil, Air Vaporizer with Remote Control, Timer Setting, White
Best Large Humidifier
Levoit LV 600HH Ultrasonic
  • Remote-controlled
  • Large tank capacity
  • Mist settings
Product Image of the Hupro Premium Humidifier for Bedroom 5L Large Room Home Plants Baby Kids Room Air Vaporizer Ultrasonic Cool & Warm Mist Humidifier Top Fill with Essential Oils & Humidistat Control Remote Timer
Best for Cold and Allergy
Hupro Premium
  • 5-liter water tank
  • Provides both cool and warm mist
  • Compatible with essential oils
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 Vicks Warm Mist Humidifier, Medium to Large Rooms, 1 Gallon Tank –Vaporizerand Warm Mist Humidifier for Baby and Kids Rooms, Bedrooms and More
Cleanest Humidifier
Vicks Warm Mist Humidifier
  • Soothing mist
  • Easy to clean
  • 3 year warranty

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

Overheating

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. Hupro Premium Ultrasonic Humidifier

Best Warm Mist Humidifier for Cold and Allergy

This Hupro humidifier has a range of awesome features. But one thing worth noting is that this is a source of relief for those with cold and allergy symptoms. The technology behind this machine can relieve these nasty side effects from stuffiness, dry skin, congestion, or an itchy nose and throat.

So if you’re looking to get rid of your cold and allergy symptoms, this might be just the machine. Enjoy a state of relaxation while still ensuring your home is safe and comfortable for the rest of the family.

Why We Love It

5-Liter Water Tank

The large water tank means this humidifier is ideal for any room up to 500 square feet. It also manages to run for up to 30 hours between refills so that you can enjoy healthier air with much less hassle.

Cool and Warm Mist

This handy machine provides both cool and warm mist, so you can customize it to suit your needs. It goes all the way up to 140 degrees, too, which is very nice! This allows you to adjust a room’s humidity levels anywhere from 30 percent to 70 percent.

Compatible With Essential Oils

Enjoy an absolute state of relaxation since this machine is compatible with essential oils. In addition, it has an essential oil box so you can freshen the air and enjoy all the benefits of essential oils.

Keep In Mind

Annoying Filling Design

While the top filling design is easier to use than the bottom filling one, the design is a bit flawed. The spout doubles as the handle, making it easy to spill water as you transport the tank. It’s also easy to toss the water out if you accidentally nudge the machine since the spout doesn’t shut or lock.

Not the Most Durable

A few customers complained that this stopped working after a few months. In fact, some only got a few weeks of use from it before it died. Others had a constant EF error message that they couldn’t shake. Thankfully, customer service is good, but it’s still a disappointment to experience this.

Additional Specs

Working Time Up to 30 hours
Tank Capacity 1.3 gallon
Max. Mist Output Not specified, but five speed settings
Dimensions 15.2 x 11.46 x 10.67 inches
Room Coverage Up to 500 square feet

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

Affordable

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. Vicks Warm Mist Humidifier

Cleanest Warm Mist Humidifier

This Vicks model is mainly popular due to its being antimicrobial and the ability to release 95% germ-free, visible, warm mist to aid in temporary relief of cough and nasal congestion.

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. It also comprised of a medicine cup where one could use to pour the liquid inhalants to further alleviate nasal decongestion.

Why We Love It

Soothing Mist

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

Easy to Clean

This humidifier has a wide tank opening allowing the user to have easy access to the humidifier making it easy to clean and refill a gallon of water. This prevents the spreading of mold and bacteria, which can be common in humidifiers due to the presence of moisture.

3 Year Warranty

Equipped with a three-year warranty period, this humidifier is sure to last long compared to other humidifiers. It can cover a medium to large size room.

Keep In Mind

Lights Cannot be Turned Off

The only drawback of this product is that you cannot leave the humidifier open with the lights off which is a bit off for some user.

Additional Specs

Working Hours Up to 24 hours
Tank Capacity 1 gallon
Max Mist Output 1 gallon per 24 hours
Dimensions 12 x 7.88 x 14.25 inches
Room Coverage Medium to large.

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
Hupro Premium Ultrasonic Humidifier For Cold and Allergy 30 hours 1.3 gal. Not specified 15.2 x 11.46 x 10.67″ 500 sq. ft.
Honeywell HWM705B Humidifier Affordable 24 hours 1 gal. 1 gal/day 12 x 10 x 6.2″ 250 sq. ft.
Vicks Warm Mist Humidifier Cleanest 24 hours 1 gal. 1 gal/day 12 x 7.88 x 14.25″ Medium to large.

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.

Headshot of Matthew Sullivan

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.