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Best Warm Mist Humidifier

Best Warm Mist Humidifier
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Type Console
Type of Mist Warm
Type of Humidification Steam
Room Coverage 860 sq. ft.
Tank Capacity 2 gal
Humidification Performance 3.5 gal/day
Humidistat Digital
Controls Electronic
Water Low Indicator Yes
Automatic Shut Off Yes
Weight 10 lbs
Dimensions 14 x 9.5 x 13.2
Warranty 3 years
Check Amazon Price See Full Review
Type Compact
Type of Mist Warm
Type of Humidification Steam
Room Coverage 400 sq. ft.
Tank Capacity 1 gal
Humidification Performance 1.90 gal/day
Humidistat --
Controls Dial Knob
Water Low Indicator No
Automatic Shut Off Yes
Weight 4.25 lbs
Dimensions 12 x 7.9 x 14.2
Warranty 3 years
Check Amazon Price See Full Review
Type Compact
Type of Mist Warm
Type of Humidification Steam
Room Coverage 250 sq. ft.
Tank Capacity 1 gal
Humidification Performance 2.0 gal/day
Humidistat --
Controls Dial Knob
Water Low Indicator Yes
Automatic Shut Off Yes
Weight 3.73 lbs
Dimensions 10.75 x 6.5 x 12.68
Warranty 3 years
Check Amazon Price See Full Review
Type Console
Type of Mist Warm
Type of Humidification Steam
Room Coverage 400 sq. ft.
Tank Capacity 1.3 gal
Humidification Performance 3.0 gal/day
Humidistat Yes
Controls Dial Knob
Water Low Indicator Yes
Automatic Shut Off Yes
Weight 4.02 lbs
Dimensions 14.21 X 8.19 X 12.76
Warranty 3 years

Picture yourself at home on a cold winter’s night, suffering from chapped lips, dry skin, and a terrible cold that doesn’t seem to be going away. Not a pretty picture, right? Well, believe it or not, these are all symptoms of exposure to dry air which is very common during winter.

One of the best ways to keep these symptoms at bay is to have a humidifier at home. Warm mist humidifiers in particular are great companions during winter because they release warm steam that raises both the humidity level and the ambient temperature in your home, keeping you warm and comfortable. Aside from these benefits, warm mist humidifiers can also help curb cold and flu symptoms by keeping your nasal passages moist, while at the same time reducing allergies, asthma attacks, and even snoring!

Before you rush out and buy a warm mist humidifier, however, take a moment to read this article, which is designed to help you find out which warm mist humidifiers might be best for you and your family. Read on to find out more!

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Boneco Air-O-Swiss S450 Steam Humidifier

The Boneco S450 is a feature-packed steam humidifier capable of covering large areas up to 860 sq. ft. in size. Although relatively small in size, its tank is capable of holding up to 2 gallons of water and has a daily humidity output of 3.5 gallons.

Pros

  • Quiet
  • Large room coverage
  • Small and compact
  • Not too hot
  • Feature-packed
  • Has features to aid in cleaning and maintenance
  • Humidifies quickly
  • Fragrance container suitable for essential oils

Cons

  • Expensive (upfront and long term)
  • High maintenance
  • Cleaning accessories are also expensive

Features

  • Steam Humidifier
  • Humidistat
  • Automatic Shut Off
  • 3 Output levels
  • Digital touch panel
  • Display dimmer
  • Anti-Mineral Pad
  • 9-Hour Timer
  • Water Low Indicator
  • Cleaning Indicator
  • Auto Mode
  • ECON Mode
  • Manual Mode
  • Decalcification Mode
  • Fragrance container
  • 3-Year Warranty

The Boneco S450 from Air-O-Swiss is in a league of its own. Easily the most expensive warm mist humidifier on this list (and probably one of the most expensive humidifiers out there), the S450 comes packed with features. Aside from the standard options (i.e.: automatic shut off, water low indicator, and a humidistat), the S450 also has a timer, a display dimmer, an anti-mineral pad, a maintenance indicator, a decalcification mode, and a fragrance container for your essential oils! Needless to say, the people at Air-O-Swiss definitely put a lot of thought into this humidifier.

In addition, the S450 has a lot of humidifying power as well: it’s able to cover large areas up to 860 sq. ft. in size; it has a tank size that can hold up to 2 gallons of water; and it has a daily humidity output of 3.5 gallons. With these specifications, you can bet that the S450 will be able to do its job quickly. In addition, the S450 has 3 modes to choose from: manual mode to manually control humidity, auto mode for automatic humidity control, and ECON mode for energy-saving performance. All these modes help make the S450 all the more convenient and easy to use.

Maintenance-wise, the S450 requires frequent-but-easy cleaning, thanks to the cleaning indicator the lets you know when it’s time to clean and the special decalcification mode that removes mineral deposits on the inside of the machine. In short, the S450 is an incredible humidifier. It will cost you a pretty penny, but if you’re looking for a humidifier that does its job and more then look no further than the S450.

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The Vicks Warm Mist Humidifier V750 is one of the most popular warm mist humidifiers on the market, with 1-gallon tank capacity and 1.9-gallon daily output capacity. It is able to cover medium to large areas around 400 sq. ft. in size. It comes with a medicine cup and Vicks VapoPads for added scent.

Pros

  • Affordable
  • Large room coverage
  • Humidifies quickly
  • Easy to clean/maintain
  • Not too hot
  • Easy to check water level
  • Small and lightweight
  • Medicine cup
  • Durable
  • Good for treating colds and flu

Cons

  • No humidistat
  • No water low indicator
  • Leaking problems
  • Loud

Features

  • Steam Humidifier
  • 2 Output levels
  • Medicine Cup
  • Vicks VapoPads
  • Automatic Shut Off
  • Optional Night Light
  • 3-Year Warranty

The V750 is a small, budget-friendly warm mist humidifier capable of servicing areas up to 400 sq. ft. in size with a daily humidity output of 1.9 gallons. There are 2 humidity output levels from which to choose, as well as a medicine cup for medicinal inhalants and a scent pad slot for the Vicks VapoPads that the unit comes with. These VapoPads release a soothing menthol scent, similar to the famed Vicks VapoRub that’s great for relieving a stuffy nose and other flu symptoms. It also has an automatic shut off feature and an optional night light.

Aside from being a great companion during your sick days, the V750 does an excellent job of humidifying the room. It works quickly and can increase humidity levels in a matter of minutes without getting too hot. It’s also easy to fill, clean, and maintain. Although it lacks a low water indicator, it shouldn’t be too big of a problem since you can easily check the water level through the transparent water tank. Users have also praised it for its durability.

However, users have also complained that it works very loudly, making noticeable bubbling noise even on the low setting. Others complained of leaking problems after a few months of use, saying it’s due to some critical design flaws. In addition, the V750 is greatly limited by its small room coverage, as well as the lack of a humidistat. With all things considered, however, the V750 still remains to be an excellent, budget-friendly option to keep your home warm and cozy.

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The Honeywell HWM705B Warm Moisture Humidifier is a compact warm mist humidifier capable of covering small rooms up to 250 sq. ft. in size. It has a tank capacity of 1 gallon and has a daily humidity output of 2 gallons.

Pros

  • Affordable
  • Small and lightweight
  • Energy efficient
  • Easy to fill and maintain
  • Medicine cup
  • Humidifies quickly
  • Quiet

Cons

  • Small room coverage
  • No humidistat
  • Leaking problems

Features

  • Steam humidifier
  • 2 Output levels
  • Medicine Cup
  • Water Low Indicator
  • Automatic Shut Off
  • 3-Year Warranty

The HWM705B from Honeywell is almost identical to the Vicks V750: the same tank size, almost the same daily humidity output capacity, and roughly the same size and shape. It’s far more popular Amazon, however, and although its average rating isn’t the best, the HWM705B has a lot of redeeming qualities.

At first glance, you can see several similarities to the V750. Even the features are more or less the same: 2 humidity output levels to choose from, a medicine cup for medicinal inhalants, and an automatic shut off feature. The HWM705B has the added benefit, though, of having a water low indicator which lets you know when it’s time to refill the tank. The HWM705B also has a slightly higher daily humidity output of 2 gallons, meaning it works a little faster at humidifying a room.

Aside from these features, the HWM705B is just as affordable as the V750. In addition, long-term costs are kept low because the HWM705B is very energy efficient and won’t increase your electricity bill. Refilling and maintenance are a breeze, with easily accessible parts and pieces. Its biggest advantage over the V750 is probably how quiet it is: even the lightest sleeper won’t be bothered with this running through the night.

Unfortunately, the HWM705 is also limited by a small room coverage of 250 sq. ft. as well as the lack of a humidistat which could have been helpful to monitor the humidity levels. Like the V750, several users have also complained of leaking problems with the HWM705.

Overall, the HWM705 is still a strong contender and is probably one of the best in its price range along with the V750.You get a humidifier that’s strong enough for small rooms without being too loud or take up too much space without breaking the bank.

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The Honeywell HWM-340 is a console-type warm mist humidifier capable of releasing 3 gallons of  95% bacteria-free steam per day. It has a 1.3-gallon tank capacity and can humidify areas up to 400 sq. ft. in size.

Pros

  • Affordable
  • Quiet
  • Energy efficient
  • Large room coverage
  • Easy to fill and maintain
  • Medicine cup

Cons

  • Leaking problems
  • Problems with humidistat

Features

  • Steam Humidifier
  • Automatic Shut Off
  • Water Low Indicator
  • Humidistat
  • 2 Output levels
  • Medicine cup
  • Dishwasher-Safe Parts
  • 3-Year Warranty

Our mid-price contender is the Honeywell HWM-340 which is a console-type warm mist humidifier capable of servicing large rooms up to 400 sq. ft. in size. While it doesn’t have all the great features and modes that the S450 has, the HWM-340 has all the features that you would expect from a mid-range warm mist humidifier.

The HWM-340 has all the essentials: an automatic shut off feature when water levels get too low, a low water low indicator to remind you when it’s time to refill the tank, and a humidistat. In addition, the HWM-340 also has 2 humidity output levels to choose from as well as a medicine cup for medicinal inhalants which can help during flu season. These features are more than enough to make the HWM-340 easy to use and provide enough supplemental but important information to the user.

The HWM-340 is just a fraction of the price of the S450 and just a little more expensive than both the V750 and the HWM705B. It’s affordable in the long run too because it doesn’t consume too much electricity, even for a warm mist humidifier. It’s easy to fill, clean, and maintain.

It’s not without flaws, though; like the other humidifiers, the HWM-340 also has its fair share of users complaining about leaking problems. The most worrisome complaints were about the humidistat which seemingly did not work for some people, regardless of how long the humidifier has been running. Despite these complaints, several of those who purchased the HWM-340 still stand by its reliability and well-roundedness.

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Warm Mist Humidifier Buyers Guide


What is a warm mist humidifier?

In general, a humidifier is a device that increases the moisture in an area. Because low moisture can have adverse health effects, having a humidifier in your home can be very beneficial especially during the drier months. Warm mist humidifiers release warm moisture by heating water, creating an environment that is warmer and more humid.

What is the difference between a warm mist humidifier and a cool mist humidifier?

A cool mist humidifier doesn’t require heating water to create steam like a warm mist humidifier does. While a warm mist humidifier creates a more humid environment, it also makes that environment warmer. A cool mist humidifier works with water that is the same temperature as the room, so while it humidifies the room, the temperature stays the same. It’s important to note that warm and cool mist humidifiers are equally effective at humidifying the air. By the time the water vapor reaches your lower airways, it will be the same temperature regardless of whether it started out warm or cool.

What are the benefits of using humidifiers?

  • Alleviate cold and flu symptoms – If you’re suffering from cold and flu symptoms, using a humidifier at night can help you recover faster. It is able to moisten your nasal passages and allow you to breathe easier. Humidifiers may also help alleviate sore throat and sinus headaches.
  • Reduce allergies and asthma attacks – People who suffer from allergies or asthma tend to have a worsening of symptoms when the air is dry. Adding moisture to the air can help reduce allergens and any pollutants that may cause asthma attacks. Using a humidifier together with a high quality air purifier will be even more effective at reducing allergens at home.
  • Reduce frequency of infections – When air is not too dry, bacteria and viruses tend to be less infectious. Research has shown that a humidity level of 40% or higher decreased the infectivity of influenza virus by 14%.
  • Prevent dry skin – When your skin is exposed to dry air, it cracks and wrinkles more easily. To prevent this from happening, you can keep humidity levels at around 40% or higher.
  • Reduce snoring – Snoring can be caused by a throat that is too dry. Humidifiers can help moisten the respiratory tract and lessen both the noise and intensity of snoring by adding moisture to the air.
  • Protect wooden furniture – Wooden furniture, walls, and floors are more prone to cracking and shrinking when humidity levels are low. This can lead to expensive repairs and even structural damage. A humidifier can help add moisture to the air and prevent this from happening.

What are the types of warm mist humidifiers?

There are two types of warm mist humidifiers:

  • Steam/Vaporizer – Steam humidifiers (or steam vaporizers, as they are popularly referred to) works by boiling or heating water at very high temperatures, releasing steam and moisture into the air. They are popular remedies for the common cold as most steam humidifiers allow medicinal inhalants to be incorporated into the steam produced. Furthermore, this type of humidifier releases “cleaner” mist as compared to cool mist humidifiers because bacteria is eliminated during the heating process so you can rest assured that the mist you’re inhaling isn’t contaminated.

Unfortunately, there has been a lot of controversy surrounding steam humidifiers and warm mist humidifiers because of the risk they pose. They tend to get very hot while in use and are considered unsafe for use around children and pets. Low quality steam humidifiers may have poorly designed heat sources that could cause the product to overheat, melt, leak, and potentially start fires.

Pros Cons
  • Much quieter because there are no fans involved
  • Lower risk of bacterial contamination because water is heated at high temperatures
  • Great for treating colds and flu, especially with medicinal inhalants
  • Doesn’t use any filters that need to be replaced
  • Provides both humidity and warmth for a more comfortable environment
  • Needs to be cleaned regularly to remove mineral deposits and limescale
  • Generally has smaller room coverage compared to other types of humidifiers
  • Parts and surfaces tend to get quite hot while in use and are thus deemed unsafe around children and pets
  • Consumes more electricity because of the heating element
  • Potential fire hazard, especially when used for long periods of time
  • Ultrasonic – An ultrasonic humidifier uses a diaphragm that vibrates at an ultrasonic frequency (thus the name) to create water droplets that are released in the form of mist. These types of humidifiers can either emit cool mist only, warm mist only, or both. An ultrasonic humidifier that can emit both warm and cool mist is called a dual mist ultrasonic humidifier.

Dual mist ultrasonic humidifiers and cool mist ultrasonic humidifiers are extremely popular these days. Based on our research, however, there aren’t many ultrasonic humidifiers that only produce warm mist that are worthy of attention. Below are the pros and cons of using ultrasonic humidifiers in general:

Pros Cons
  • Much quieter because there are no fans involved
  • Consumes the least amount of energy among all the other types of humidifiers
  • Not hot parts or surfaces (unless of course it is a dual mist ultrasonic humidifier)
  • More versatile because they’re able to produce both warm and cool mist
  • Tend to have more useful features compared to other types of humidifiers
  • Doesn’t use any filters that need to be replaced
  • Able to cover larger areas
  • Needs to be cleaned regularly to avoid build-up of mold and bacteria
  • Produces white dust due to minerals present in tap water (but can be avoided by using demineralized or distilled water)
  • Generally has smaller room coverage compared to other types of humidifiers
  • Slightly more expensive than evaporative and impeller humidifiers especially if dual mist
  • Higher risk of bacterial contamination because the water used is at room temperature (unless warm mist is used)

What are the benefits of warm mist humidifiers?

  • Provides warmth – As previously mentioned, warm mist humidifiers produce steam that is warm enough to raise the temperature in the room it’s placed in. Of course, the warm mist humidifier should be running at a higher rate and for a longer period of time for it to be able to do this. This is particularly beneficial during the cooler months when warmer temperatures are more desirable.
  • Cleaner mist – Because the water used in warm mist humidifiers has to go through a heating process, most of the water-bred germs and bacteria are eliminated before they are released. This means that the steam being produced by warm mist humidifiers are cleaner and more sanitary.
  • Quieter – Unlike evaporative cool mist humidifiers which use fans to operate, warm mist humidifiers don’t use any fans and thus are typically quieter.
  • No filters to replace – Evaporative cool mist humidifiers make use of a wick filter to produce mist. This filter needs to be replaced regularly, otherwise the humidifier will lose its efficiency. Both ultrasonic and steam humidifiers do not use any filters so you don’t have to worry about that.

What are the disadvantages of using warm mist humidifiers?

  • Safety issues – The main concern with warm mist humidifiers is that they may get too hot during operation. Certain parts and pieces will get very hot, as does the steam that they produce. This is why warm mist humidifiers should be kept away from children and pets, and should never be used in nurseries.
  • High maintenance – Like cool mist humidifiers, warm mist humidifiers also need to be cleaned on a regular basis. Because of the heating element and other parts, warm mist humidifiers are generally more difficult to clean and have several nooks and crannies where mineral build up could occur.
  • Smaller room coverage – Warm mist humidifiers typically have smaller room coverage capabilities than cool mist humidifiers.
  • Higher energy costs – Because warm mist humidifiers need to heat water to produce steam, they consume a lot more energy compared to cool mist humidifiers.
  • More expensive – In general, warm mist humidifiers are a little pricier compared to cool mist humidifiers.

Final Thoughts

Having a warm mist humidifier at home provides you with a litany of health benefits and makes all those dry, low-humidity days more bearable. They’re affordable and do just as good a job as cool mist humidifiers at adding moisture to the air.

All the humidifiers in this list have their merits, and we’re positive that there’s at least one on here that would fit your needs. If we were to pick one, however, we’d highly recommend the Boneco Air-O-Swiss S450. Yes, we’re aware that it comes with a hefty price tag, but considering its humidifying power and its repertoire of features, it’s definitely going to be worth every penny. The S450 makes everything so much easier: easy to fill, easy to clean, easy to use, and quick to humidify.