Buyers Guide & Information

Best Humidifiers For Asthma

Our comparisons cover the top brands in quality air so that asthma sufferers can breathe easy.

Maybe you never thought that the humidity levels within your home could affect your lungs and breathing. Still, more and more research shows that humidity can play a significant role in triggering asthma attacks and allergic reactions. More specifically, it’s the lack of humidity that causes the most harm.

The easy solution? Invest in a quality humidifier that has been rated to help those who have asthma. Even if you think that buying a humidifier sounds too easy, don’t knock it ’til you’ve tried it! Asthma sufferers everywhere agree that this is a simple yet effective method to alleviate symptoms and prevent asthma attacks from happening.

Importance of Well-Balanced Humidity in the Home

If you were to ask this question at your local Home Depot, you’d probably get a lot of answers explaining the harms of having too much humidity rather than too little. This is because too much moisture in the air can lead to problems that could affect your home’s structural integrity, like mold.

But too little humidity can be just as detrimental – specifically to your health. When the air inside your home is extremely dry and holds no moisture, your nose and throat can become dry and irritated, leading to severe colds and uncontrollable asthma symptoms.

Too much humidity can also have adverse effects on people with asthma, though. Moisture in the air can cause mold spores and dust mites, and both of these have been known to be a trigger for asthma attacks. The key is to strike the right balance; indoor humidity levels that range from 30 to 50 percent are best for people with asthma.

Benefits of Humidifiers for Asthma Sufferers

If your home’s humidity levels are consistently less than 30%, you could greatly benefit from investing in a humidifier. There are many health benefits to using a humidifier, and many of these benefits relate back to your lungs and quality of breathing

According to Mayo Clinic, “increased humidity may ease breathing in children and adults who have asthma or allergies, especially during a respiratory infection such as a cold. But dirty mist or increased growth of allergens caused by high humidity can trigger or worsen asthma and allergy symptoms.”

This is why it’s crucial to invest in a quality humidifier that’s highly-rated specifically for asthma.

Even if you do not have asthma, a well-balanced humidity can help alleviate allergies, dry sinuses, dry/irritated skin, and more.

Humidifiers For Asthma Sufferers Compared

Model Room Size Tank Size Runtime Price
TaoTronics 107 – 322 sq. ft. 1.05 gallons 12-30 hrs Check Amazon
Pure Enrichment MistAire 350 sq. ft. 0.4 gallons 16 hrs Check Amazon
Dyson AM10 500 sq. ft. 1 gallon 11-12 hrs Check Amazon
Aprilaire 400M 4000 sq. ft. 17 gallons Continuous Check Sylvane

Check Amazon

 AIRCARE MA1201 2600 – 3600 sq. ft. 3.6 gallons 36 hrs Check Sylvane

Check Amazon

LEVOIT LV600HH 753 sq. ft. 1.5 gallons 36 hrs Check Amazon
Honeywell HCM350W 350 sq. ft. 1 gallon 24 hrs Check Amazon
LEVOIT Dual 100 260 sq. ft. 0.48 gallons 8 hrs Check Amazon
Relee Portable N/A 0.01 gallons 4-5 hrs Check Amazon
Everlasting Comfort 500 sq. ft. 1.5 gallons 50 hrs Check Amazon

Buying Guide: Choosing Humidifiers for Asthma

Humidifier Type vs. Coverage Area

The first step in buying a new humidifier for asthma treatment is considering the size of the space. Every humidifier comes with a recommended coverage area, which is measured in square feet.  You should be able to find a humidifier for you, no matter if you’re looking for 400 square feet of coverage or 4,000.

In terms of type, you’ll need to decide on a cool or hot humidifier for asthma. A cool machine releases cool mist, which is an excellent choice for a child’s room since you won’t have to worry about hot water accidents. However, a warm mist humidifier is more effective at killing waterborne bacteria and mold spores.

Filtering Properties

Compared to an air purifier, a humidifier isn’t nearly as effective at filtering out contaminants and allergens from the air. However, many humidifiers come with filters that trap allergens, dirt, dust, and other particles. In most cases, these filters are washable but check into this to ensure that you won’t be spending a fortune on filter replacements in the future.

Diffusion Functionality

Some humidifiers come with a function that allows you to diffuse essential oils while also adding moisture to the air, like lavender or eucalyptus (we’ll talk more on this later).

Runtime & Water Tank Capacity

Nobody wants to spend precious time lugging water to the humidifier multiple times per day. The run time of each machine is different, but generally, the larger the tank, the longer the humidifier can run without needing a refill. To give you an idea, the TaoTronics humidifier has a tank capacity of just over 1 gallon and can run as long as 30 hours on a full tank.

Ease of Use, Setup & Maintenance

Setting up, using, and maintaining your humidifier should feel like rocket science. Most of these units are basically ready to go right out of the box, so all you really need to do is fill up the tank and plug it in.

Noise Level

Most asthma sufferers choose to set up their humidifier in the bedroom. Whether this is the case for you or not, pay close attention to a machine’s noise level before buying. This is measured in decibels (dba) and usually ranges from the upper 30s to low/mid-40s. Anything higher than this noise level should be avoided, especially if you’ll be sleeping while the machine is on.

Extra Features

Although a basic humidifier might be capable of getting the job done, raising humidity, and helping with asthma symptoms, it’s always more fun when a machine comes with cool extra features. In the humidification industry, some of the coolest (and most useful) added features include a built-in diffuser, programmable timer, overflow protection, and mist output controls.

Price & Warranty

Anytime your health is concerned, price should never be the determining factor. That said, it’s still important to find a humidifier that falls comfortably within your budget. If you decide to go with a cheaper model, just be sure to look into reviews to get a feel for the product’s performance.

Lastly, warranty coverage is another consideration. A more extended warranty is best, but try not to focus solely on the length of the policy. Also, check to see what’s covered and if there are any special terms, conditions, or exemptions.

10 Best Humidifiers for Asthma Sufferers Reviewed

1. TaoTronics

Best Humidifier for Asthma
Type Ultrasonic Cool Mist
Room Coverage 107-322 sq. ft.
Water Tank Capacity 4 liters (1.05 gallons)
Runtime 12-30 hrs
Filter Change 4-6 months

The TaoTronics was rated as the best humidifier for asthma in 2019 and 2020, which isn’t surprising considering the thousands of 5-star reviews singing its praises. This is the best ultrasonic humidifier for asthma overall, especially if you need to bring moisture into the bedroom while you sleep. It’s basically silent as it operates at an incredibly low noise level of 38 decibels.

The medium-sized 4-liter tank can run consistently for 12 to 30 hours, depending on the room’s current humidity levels. This is designed for areas as small as 107 square feet and as large as 322 square feet, and it’s portable enough to move around the house, weighing just over 3 pounds when empty. The coolest feature, though, is the built-in humidistat that tells you the current humidity level.

In terms of safety features, TaoTronics says that this humidifier “automatically shuts off when water runs out and the microporous cartridge filters the water from micro-organisms and bad odor.”

It’s recommended that you change the filter every 4 to 6 months, but if you have a purifier running simultaneously, you can stretch the filter life for a bit longer.

One thing to note is that this humidifier is not compatible with essential oils, so you won’t be able to breathe in the benefits of lavender, eucalyptus, or clove. However, it is great to relieve cough and congestion caused by colds, allergies, and asthma and help you breathe easier.


  • Auto shutoff
  • Instant congestion relief
  • Great value for the cost
  • Built-in humidistat
  • Near-silent operation


  • No essential oil diffusion

2. Pure Enrichment MistAire Ultrasonic Cool Mist

Best Bedroom Humidifier for Asthma Sufferers
Type Ultrasonic Cool Mist
Room Coverage 350 sq. ft.
Water Tank Capacity 1.5 liters (0.4 gallons)
Runtime 16 hrs
Filter Change No Filter

In terms of operation, the Pure Enrichment MistAire is very similar to the TaoTronics humidifier. This one is also an ultrasonic cool mist model. Still, it’s been specifically rated by individuals with asthma and other lung issues as the best humidifier for asthma sufferers. With over 25K reviews, it’s safe to say that you can trust this claim.

This handy little humidifier is great for kids, adults, and even pets struggling with asthma. It’s especially useful for nighttime use since it barely makes a peep as it safely moisturizes the air for up to 16 hours. This runtime is a bit low for some people’s liking, especially if you plan on running the humidifier constantly, but others like the fact that the 1.5L tank is small, so refills are relatively easy.

The Pure Enrichment device is ideal for small and medium-size bedrooms, nurseries, offices, and dens. There’s been some confusion about the specific coverage area since the manufacturer doesn’t list it as exact square footage. Still, most people can get by with using this humidifier in a maximum of 350 square feet.

The only thing that we’re not loving about this product is the lack of a filter. In a way, it’s not such a bad thing since you won’t have to worry about replacing the filter every few months. It also means there’s no filtration of the water as it turns into moisture. But as long as you use clean, distilled water, you have nothing to worry about.


  • Great for small rooms
  • Affordable
  • Auto shutoff function
  • Perfect for overnight use
  • 5-year warranty


  • Very low tank capacity
  • No filter

3. Dyson 303515-01 AM10

Top of the Range
Type Humidifier + Purifier
Room Coverage 500 sq. ft.
Water Tank Capacity 1 gallon
Runtime 11-12 hrs
Filter Change 6 months

Dyson is a household name when it comes to vacuum cleaners, but this brand also specializes in high-quality air purifiers as well as humidifiers. The Dyson 303515-01 doesn’t fall within everyone’s budget, but if you’re looking for a top of the range humidification tool for your asthma, this is the one.

The high cost of the Dyson is completely justified; it utilizes Ultraviolet Cleanse technology, killing 99.9% of bacteria before hygienic mist and hydrated air is projected into the room. The combo of air purification and humidifying is why the 303515-01 is rated as the best humidifier for asthma cough.

Another high-tech feature of the Dyson is the Air Multiplier technology, which generates long-range mist projection to distribute hydrated, hygienic air evenly throughout the room. This means no matter where you place the humidifier; the humidity level will be consistent throughout the entire space.

There’s no denying that this is the most intelligent product on this list of best humidifiers for asthma. It features Intelligent Climate Control to measure both the temperature and the moisture in the air to create a comfortable environment with no over-humidification.

The biggest downfall of the Dyson is the high price tag, but try to remember that this device is a purifier and humidifier all-in-one. Plus, it’s certified as Asthma and Allergy Friendly by the AAFA, it has been awarded the Quiet Mark accreditation by the Noise Abatement Society, and lastly, it was awarded the Parent Tested, Parent Approved seal.


  • Kills bacteria before misting
  • Intelligent Climate Control
  • AAFA certified
  • A brand you can trust


  • High cost
  • Relatively short run time

4. Aprilaire 400M

Best Whole-Home Humidifier for Asthma
Type Evaporative Whole Home
Room Coverage 4000 sq. ft.
Water Tank Capacity 17 gallons
Runtime Continuous
Filter Change 1-2 years (on usage)

For asthma sufferers who consider themselves home-bodies, installing a furnace whole-house humidifier for allergies and asthma is in order. Whole-house units are not very portable, and they require more steps for installation, but models like the Aprilaire 400M will make you wonder why you waited this long to buy one.

The standard 400M has a coverage area of 4,000 square feet, but there are also options for 3,000 and 4,200. Aprilaire manufactures all of its products in the USA. This company was the inventor of the whole home evaporative humidifier, so you know this is a name you can trust. Even with the large coverage area, the price is extremely affordable, so don’t assume that a whole-home humidifier won’t fit in your budget.

The driving force behind Aprilaire products is “Humidity for Health.” That’s why they’ve designed this product to help you maintain optimal humidity in your home of 35% – 45%. This humidity level has shown to reduce the incidence of respiratory infections and symptoms related to allergies and asthma by minimizing the formation of bacteria and viruses, fungi, and dust mites.

The Aprilaire has a capacity of 17 gallons per day, and it’s designed to conserve water using a unique process that evaporates 100% of the water flowing into the water panel, so there’s no waste whatsoever. Of course, installation is more intricate since there are a lot more moving parts to a whole-house unit, so it might be a good idea to hire a professional.


  • Long filter lifespan
  • No water waste
  • Manual controller included
  • Brings moisture to the entire home
  • Amazing value


  • Intricate installation process
  • Difficult filter changes

5. AIRCARE MA1201 Whole-House Console-Style Evaporative

Best Evaporative Humidifier for Asthma
Type Evaporative Whole Home
Room Coverage 2600 – 3600 sq. ft.
Water Tank Capacity 3.6 gallons
Runtime 36 hrs
Filter Change Replace Seasonally

If you like the idea of a whole-house humidifier but don’t love the idea of having to deal with furnace installation, the Aircare MA1201 is a great alternative. This is another humidifier that can bring moisture to the entire home (up to 3600 square feet), but it’s designed with the console-style and requires no furnace installation.

This machine is built with a digital humidistat that automatically maintains your desired humidity level with extreme accuracy, so you never have to wonder about the humidity levels in your home. The console display is basic and doesn’t have tons of cool features, but this is ideal if you’re looking for something easy to use that will get the job done.

According to Sylvane, operating the Aircare MA1201 is very simple: “Set your desired humidity between 25% and 65% and let the onboard humidistat do the work for you. If your home’s humidity falls below your setting, the humidifier automatically adjusts to the most efficient fan speed to increase moisture output.”

Basically, once you set it, you can forget it.

Even though this is a whole-house unit, it’s still easy enough to move from room to room. The console sits on 4 rolling casters for added portability. The tank capacity is close to 4 gallons, and when it’s time for a refill, all you have to do is detach the tank from the base, fill it, and secure it back into place.


  • Portable console-style
  • Easy to use
  • Built-in humidistat
  • Mineral-absorbing filtration
  • Dry-out mode to prevent mold


  • Louder than others (45 dB minimum)
  • Needs frequent filter changes


Best for Large Rooms
Type Ultrasonic Cool Mist
Room Coverage 753 sq. ft.
Water Tank Capacity 6 liters (1.5 gallons)
Runtime 36 hrs
Filter Change 6 months to 1 year

We’ve covered a few small-room options and a few whole-house humidifiers, but if you’re looking for something in between, the Levoit LV600HH is a solid choice. With a mist output of up to 500 mL/hr, it’s the perfect option for large rooms (or even small homes). It can handle a space of about 750 square feet without missing a beat.

This machine has a 6-liter (1.5-gallon) tank capacity, which gives it a runtime of about 36 hours on the low-mist setting. The best feature is that you have the option for both cool and warm mist settings to customize your home’s humidity. The cool mist setting is ideal for clearing sinuses and alleviating asthma, while the warm mist is better for killing bacteria in the water.

All in all, the Levoit is an excellent choice for creating a cozy atmosphere in a large room. It’s ultra-quiet, easy to use, and relatively affordable. The main downside is that adding water can feel like a chore, and the design of the water tank could use some improvement.


  • Great customer service
  • High mist output
  • Convenient remote control
  • Set It & Forget It
  • Helps with sleep problems


  • Water tank design needs improvement

7. Honeywell HCM350W Germ-Free

Popular Model
Type Evaporative Cool Mist
Room Coverage 350 sq. ft.
Water Tank Capacity 1 gallon
Runtime 24 hrs
Filter Change Replace Seasonally

Honeywell is one of those names that you can trust, no matter what product you’re buying from them. This brand’s most popular model is the HCM350W, which is not only great for allergies and asthma in humans, but also pets. Many reviewers claim to use this humidifier for cats with asthma, but it’s also a great choice for children and adults, especially during allergy season.

The best part of the HCM-350 is that the “patented germ-killing process continuously kills up to 99.9% of water-bred germs, bacteria, mold, and spores in the water.”

It uses UV technology on the water before releasing a continuous misting of cool moisture into the air. The water tank and tray are 100% dishwasher safe, making it easy to clean and maintain, and there’s a wide tank opening for easy refills.

The main drawback is that you won’t be able to set your exact humidity preference; instead, you just choose low, medium, or high. Although this isn’t ideal, Honeywell assures customers that it’s impossible to over-humidify with evaporative technology because you can’t add more moisture to the air than it can hold.


  • UV technology kills bacteria
  • Trusted Honeywell name
  • 3-year warranty
  • Wide tank opening
  • Dishwasher safe components


  • No exact humidity settings
  • Needs frequent filter changes

8. LEVOIT Dual 100

Best for Toddler & Nursery Rooms
Type Ultrasonic Cool Mist
Room Coverage 260 sq. ft.
Water Tank Capacity 0.48 gallons
Runtime 8 hrs
Filter Change No Filter

We’re rating the Levoit Dual 100 as the best humidifier for toddler asthma, the best humidifier for a child with asthma, and the best cool mist humidifier for asthma-suffering infants. If your baby or toddler has asthma, the flu, allergies, a stuffy nose, or anything along those lines, the Levoit Dual 100 humidifier can help.

The first feature that makes this suitable for babies is the cool mist technology; parents should avoid placing a warm mist machine in a young child’s room since there’s hot water involved. The next reason this is great for nurseries and kids’ rooms is that it features a Smart Sleep Mode and whisper-quiet operation. It’s the quietest machine we’ve covered so far with a low noise level of 28 dB.

Another great feature is that this humidifier is capable of diffusing essential oils. If you want to add in some aromatherapy benefits for you or your children, go right ahead. It only has a ½ capacity, so it’s not ideal for large spaces or if you want a long runtime, but it’s a safe and reliable choice for kids with asthma.


  • Smart Sleep Mode
  • Essential oil diffuser
  • Virtually silent
  • BPA-free components
  • Adjustable mist levels


  • Small tank
  • Short runtime

9. Relee Portable

Best Travel Humidifier for Asthma Sufferers
Type Pocket-Sized
Room Coverage N/A
Water Tank Capacity 0.01 gallons
Runtime 4-5 hrs
Filter Change No Filter

Traveling with asthma can be painful, especially if your accommodation doesn’t understand the importance of properly maintaining humidity. Well, you never have to suffer while on the road again, thanks to the Relee Portable humidifier-diffuser.

This pocket-sized device is great for the bedside table, an office desk, and small hotel rooms. Even with its small size and 0.01-gallon tank, this little humidifier can moisturize your skin, hydrate cracking lips, relieve congestion, and even fend off asthma symptoms and prevent attacks from happening while you’re on the road or away from home.

Since the “tank” is small, the run time is also short compared to other humidifiers on this list. After filling the water chamber, you’ll only get a few hours of moisture, but that’s not bad if you’re looking for a quick humidity fix capable of fitting in your pocket. It runs on a rechargeable battery, so you need to make sure it’s charged or else it’s useless.


  • Great for on-the-go
  • Rechargeable battery
  • No noise
  • A good option for pets


  • Lacks humidifying power
  • Frustrating auto-stop functions

10. Everlasting Comfort

Best Value for Money
Type Ultrasonic Cool Mist
Room Coverage 500 sq. ft.
Water Tank Capacity 6 liters (1.5 gallons)
Runtime 50 hrs
Filter Change No Filter

This last one by Everlasting Comfort is very similar to the Levoit LV600HH reviewed earlier. Both of these machines have a 6-liter tank capacity, a similar runtime, and can work with essential oils. The main difference is that the Everlasting Comfort humidifier is a more budget-friendly choice.

This cool-mist humidifier has a super high mist output and works with rooms up to 500 square feet, lasting up to 50 straight hours.

The manufacturer says that placing this “humidifier in the bedroom or nursery helps provide adults and babies with a good night’s sleep by diffusing moisture into the dry air, helping with coughs and clearing sinuses.”

When you consider all these factors, there’s no doubt that this machine provides value to an asthma sufferer looking to improve home air quality. An added bonus is that you won’t need to ever invest in filter replacements for this machine since the unit has been designed to operate without the need for a filter.

The only complaint is that refilling this machine can be a bit cumbersome. It’s not possible to refill it from the top with the tank still in place, and there’s no carrying handle to make the job easier. You’ll quickly get used to filling it with the technique that works best for you, but at first, don’t be surprised if there’s some spillage.


  • Incredible value for the cost
  • Essential oil tray
  • Known to help reduce illness
  • No replacement filters needed


  • Refilling can be tricky

Comparing Different Sizes of Humidifiers

Choosing the best humidifier for asthma depends on your specific needs, and one aspect of this is the size of the space you’re working with. Just like AC units, air purifiers, and dehumidifiers, every specific humidifier model operates best within a certain square footage. There are 3 main types of humidifiers based on size:

  • Whole House
    The best whole house humidifiers are capable of humidifying an entire home. These are obviously more expensive and can be quite large (usually handling up to 4,000 square feet), but they’re a great solution if you need a permanent humidifier for the whole house.
  • Single Room
    Single room units are more affordable and come in various sizes, ranging from small to large room humidifiers. If you don’t spend a lot of time at home and you just want a humidifier for the bedroom while you sleep at night, this is the way to go.
  • Personal/Travel
    There’s no point in installing a non-portable whole house or single room unit if you spend most of your time on the road or at the office. In this case, you’re better off with a personal/travel-size humidifier that you can easily bring with you while you’re on the go.

The trick is to buy a humidifier sized for the area you’re trying to add moisture back into (not on a humidifier’s overall capacity). Every model is meant for a particular coverage area measured in square footage, so use that as your guide for choosing the right size humidifier.

More About Asthma

Mayo Clinic says that asthma is “a condition in which your airways narrow and swell and may produce extra mucus. This can make breathing difficult and trigger coughing, a whistling sound (wheezing) when you breathe out and shortness of breath.”

The most common symptoms are shortness of breath, chest tightness, and coughing/wheezing. The severity of this condition varies from person to person; for some, it’s a minor nuisance, but for others, it can be life-threatening. Aside from striking the right humidity balance at home, one way to better manage asthma symptoms is through aromatherapy.

Humidifiers & Aromatherapy

There’s some debate in the medical community on whether or not aromatherapy and essential oils can be useful for asthma, but the general consensus is that it can. Although Healthline says that aromatherapy shouldn’t be your main route of treatment, some essential oils can help with asthma symptoms, including:

  • Lavender:
    Breathing in diffused lavender essential oil may help reduce inflammation caused by allergies and asthma.
  • Rosemary:
    This extract relaxes the smooth muscles of the trachea, which studies show can help to induce more relaxed breathing.
  • Eucalyptus:
    Helps people manage the symptoms of respiratory conditions such as asthma, bronchitis, and the common cold (but shouldn’t be used for children).

Comparing Humidifiers with Similar Home Air Devices

Vs. Dehumidifiers

We’ve already talked about the importance of maintaining a balanced humidity level at home. To find this balance, you first need to know what your home’s humidity actually is. This can be done with a device called a hygrometer (don’t worry, these are affordable).

To use a hygrometer, “place the small device in the room you want to test and follow the instructions. The hygrometer will show your home’s humidity level in a percentage.”

If that percentage reads lower than 30%, you’ll need a humidifier. If it reads higher than 50%, you’ll need a dehumidifier to remove some of that moisture.

Vs. Air Purifiers

Air purifiers are another wise investment for people living with asthma, especially for attacks triggered by dust, pollen, and other allergens in the air. But an air purifier won’t help raise moisture levels, so if that’s your main problem, you’ll still need a humidifier.

Vs. Vaporizers

Humidifiers and vaporizers are very similar, and technically a vaporizer is categorized as a type of humidifier. The main difference is that humidifiers generally give off cool mist while vaporizers emit warm steam.

For deciding on a humidifier or vaporizer for asthma, Healthline says that “both cool-mist humidifiers and steam vaporizers can add moisture to the air in your home and help ease your respiratory symptoms without medication. The type you ultimately choose comes down to your personal health, budget, and family considerations.”

Best Location to Put Humidifiers

The Spruce has the perfect explanation on the best place for a humidifier: “While placing a humidifier in a family room because it’s the largest area or where everyone can benefit from it may seem wise, you should place the humidifier where you need it the most, as long as you’ve sized it for that room.”

The bedroom is an obvious choice, but it really comes down to where you need the machine most, as well as what room most needs the moisture.

People Also Ask (FAQ)

What is better for asthma – warm or cool mist humidifier?

Both cool-mist and warm-mist humidifiers offer relief for allergies and asthma, but it depends on each individual’s breathing tendencies. A good rule of thumb is this: If a person can breathe well in a sauna, then a warm mist humidifier is a good choice. If a person finds it difficult to breathe in a sauna, then a cold mist humidifier is better.

How often should I change my humidifier filter?

The Spruce says that humidifier filter lifespan can be extended with proper maintenance.

“With good dust control, the average humidifier filter will only require a changing about every three months. Some wick filters can be cleaned simply by submerging them in water. It is important to always check the product manual to be sure, but this process often takes a while to ensure all dirt is removed.”

How often should I change the water in my humidifier?

It’s a good idea to change out the water (or add new water) every day. When you refill the water chamber, never use tap water. You’ll want to use distilled water instead to prevent calcium buildup in the machine, but more importantly, using tap water can lead to sinus infections and other health risks.

What is the white dust collecting in the humidifier?

Not all humidifiers produce a white dust, but there are two types that do – ultrasonic and impeller. This white dust is caused by mineral content in the water that you use to fill the machine, so using pure distilled water should prevent this from happening.

Is it safe to leave a humidifier on all night?

Absolutely, especially if you’re using it to add moisture into your bedroom’s air. As long as you keep the machine well-maintained and use the right water, it’s perfectly safe to leave it running all night.

Is a humidifier safe to use around children?

Yes, but some are better than others for use around babies and toddlers. Using a humidifier for your child with asthma can bring instant relief, especially if you go with one like the Levoit. With quiet Ultrasonic operation, this machine is meant specifically for babies, so it’s perfect for the little one’s room.

Can these units help pets with asthma?

Yes, these machines aren’t just for soothing respiratory problems in humans. Our pets can also experience difficulty breathing due to allergies, sinus problems, and asthma, so the best dehumidifier for you might also be the best humidifier for cats with asthma or dogs with allergies.

Where is a good place to buy these units?

Whether you’re looking for a room humidifier for asthma or something to bring along with you as you travel, there’s a good chance you can find it on Amazon. All of the products reviewed here can be purchased through Amazon, and most of them are sold here directly by the manufacturer.


If you’ve got the money to spend, you might as well go all out with the Dyson humidifier + purifier. This is loaded with cool features, and it has even been certified by the Asthma and Allergy Foundation of America. That said, the Dyson isn’t for asthma sufferers on a budget, which is where the TaoTronics humidifier comes into play.

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