Humidifiers have long been known to help combat the effects of dry air and relieve symptoms of allergies. When humidity levels are too low, your nasal passages can become irritated, which can further aggravate existing allergy symptoms. When humidity is too high, however, common allergens like dust mites, mold, and pollen can thrive and also make exacerbate symptoms. This is why well-balanced humidity levels are crucial for keeping allergies at bay.

If you suffer from allergies and are hoping to achieve an ideal humidity in your home, this article is for you: it compiles data on the leading humidifiers for allergy sufferers available in the market today.

  • Cool mist, evaporative humidifier
  • Can remove air pollutants and allergens as small as 0.3 microns in size
  • Covers up to 400 sq. ft.
  • Tank can hold 2 gallons of water
  • 3 output levels
  • 10-year warranty

  • Cool mist, evaporative humidifier
  • Covers up to 500 sq. ft.
  • Break-resistant tank can hold 1.1 gallons of water
  • Patented UV Technology eliminates 99.9% of water-bred germs, bacteria, and mold spores in the water before releasing it as clean, germ-free mist
  • 3 output levels
  • 3-year warranty

  • Warm mist, evaporative humidifier
  • Covers up to 600 sq. ft.
  • Tank can hold 1 gallon of water
  • Releases 95% bacteria-free steam
  • With medicine cup for medical inhalants to relieve nasal congestion and other flu symptoms
  • 3-year warranty

  • Cool mist, ultrasonic humidifier
  • Best for small rooms
  • Tank can hold 0.5 gallons of water
  • Silver Clean Protection fights the growth of mold and mildew on the surface of the water tank
  • 2 output levels
  • 1-year warranty

  • Cool Mist, evaporative humidifier
  • Can remove impurities such as dust, pollen, and particle-bound odors
  • Covers up to 540 sq. ft.
  • Tank can hold 1.18 gallons of water
  • Built-in container for essential oils
  • 5-year warranty

  • Warm & cool mist, ultrasonic humidifier
  • Covers up to 753 sq. ft.
  • Tank can hold 1.5 gallons of water
  • Automatic humidity regulation on Auto Mode
  • Compartment for essential oils
  • 2-year warranty

  • Cool mist, evaporative humidifier
  • Air washer that uses a HEPA + carbon combination filter to remove air pollutants
  • Includes PlasmaWave Technology (ionizer)
  • Covers up to 600 sq. ft.
  • Tank can hold 1.3 gallons of water
  • 1-year warranty

  • Warm & cool mist, ultrasonic humidifier
  • Covers up to 650 sq. ft.
  • Tank can hold 2 gallons of water
  • Silver Clean Protection fights the growth of mold and mildew on the surface of the water tank
  • 12-hour timer
  • 3-year warranty

Quick Navigation

1. Venta Airwasher LW25

The Venta LW25 Airwasher is a high performance evaporative humidifier that is capable of humidifying areas up to 400 sq. ft with its large 2-gallon tank. The air washers from Venta use a simple but unique technology for humidifying and purifying the air at the same time. Dust, pollen, pet dander, and other airborne pollutants stick to rotating disks within the unit and are trapped in the water. The water adds moisture to the now purified air as it is released in the form of mist via evaporation. You also have the option of adding essential oils to that mist for added relief from irritated sinuses and clogged nasal passages caused by allergic reactions.

Unfortunately, the LW25 greatly lacks key features and has a somewhat dated and bulky aesthetic. This is surprising considering how expensive the LW25 is compared to all the other models on this list. Despite these shortcomings, it’s undeniable that the LW25 is a powerhouse humidifier that has solidified its position as one of the best air washers in the market.

Pros

  • Low maintenance
  • Large room coverage and large tank
  • Quiet
  • No filters to replace
  • Energy efficient
  • No white dust
  • Compatible with Venta aromatherapy oils
  • Excellent for humidifying and purifying air at the same time
  • Long warranty

Cons

  • Expensive
  • Fewer features
  • No humidistat/hygrometer
  • Somewhat dated and bulky exterior

The Honeywell HCM-350 has always been a favorite among humidifier enthusiasts, and it’s easy to see why. The HCM-350 is a powerful evaporative humidifier, capable of servicing areas up to 500 sq. ft. in size with ease, thanks to its 2.3-gallon daily humidity output.

It is also capable of significantly reducing the amount of air pollutants in the air, even it doesn’t claim to do so. Tests have shown that it can remove dust mites, pollen, dander, and other particles within a matter of minutes, making it a great choice for allergy sufferers. To further boost its allergen-busting capabilities, the HCM-350 also uses a patented UV technology that supposedly eliminates 99.9% of water-bred germs, bacteria, and mold spores so that you can be rest assured that its released mist is clean and germ-free. Unfortunately, the biggest downside to the HCM-350 is its utter lack of features, like an automatic shut off feature or a low water indicator. While it lacks in features, it makes up for its affordability, reliability, and durability.

Pros

  • Affordable
  • Easy to maintain
  • Easy to fill
  • Quiet
  • Durable
  • High daily humidity output
  • Large room coverage
  • Mist is free from bacteria, germs, and mold
  • No white dust

Cons

  • No humidistat/hygrometer
  • No automatic shut off
  • No low water indicator
  • Need to replace wick filter regularly

With a 1-gallon tank capacity and a 1.9-gallon daily humidity output, the affordable V745 singlehandedly humidifies spaces as large as 500 sq. ft. What allergy sufferers would love about the V745 is that it comes with a cup for medicinal inhalants such as Vicks VapoSteam, which is great for relieving a stuffy nose and other flu symptoms. The warm mist further bolsters the V745’s ability to fight off allergies by soothing irritated nasal passages and preventing dust mites and mold spores from proliferating in the vicinity.

One of the V745’s most critical drawbacks is the alarming number of complaints regarding leaking. Putting that flaw aside, the V745 remains an excellent choice for allergy sufferers looking for a warm mist humidifier to relieve common allergy symptoms.

Pros

  • Affordable
  • Large room coverage
  • High daily humidity output
  • Easy to clean/maintain
  • Not too hot
  • Medicine cup
  • Good for treating cough and colds
  • No white dust
  • No filters to replace

Cons

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

The PureGuardian H940 is a compact humidifier that boasts an impressive 30-hour runtime between fillings despite only having a small 0.5-gallon water tank. In fact, everything about the H940 is small: its size, its water tank, and its room coverage capacity.

The most desirable attribute, however, of the H940 is undoubtedly the water tank’s Silver Clean Protection, a treatment used on the surface tank to prevent the growth of bacteria, mold, and mildew. While not specific to the H940, this feature ensures that you’re breathing in clean mist that’s free from the allergy triggers of mold and mildew. Unfortunately, if tap water is used in the H940, the machine will release white dust, which can potentially trigger or aggravate allergies. To prevent this, you must use distilled or demineralized water.

Overall, the H940 is a great choice, especially for those on a tight budget. While it may not be the most powerful humidifier on this list, it nevertheless gets the job done at an affordable price.

Pros

  • Affordable
  • Small enough for travel
  • Long runtime
  • Easy to fill and use
  • Easy to maintain/clean
  • Quiet
  • Silver Clean Protection prevents growth of bacteria, molds, and mildew
  • No filters to replace

Cons

  • Small room coverage
  • Small water tank
  • Not as durable as other models
  • Releases white dust
  • Short warranty

The W200 is the first air washer from Boneco and comes with a 1.18-gallon tank and the capability to humidify and purify the air in spaces up to 540 sq. ft. in size. It works on the same principle as the LW25 and cleans polluted air by running it through specially textured evaporative mats that turn in the water and add moisture to the air while effectively removing allergens and other pollutants. It can also block some odors and comes with a built-in compartment for essential oils to help further freshen the air as well.

Although not as expensive as the LW25, the W200 still has quite an exorbitant price tag as far as humidifiers go. Some people might find this off-putting since the W200 also has no smart features and offers a considerably small tank for a humidifier of its caliber.  Regardless, the W200 remains to be a top-performing air washer, combining beauty and power in one machine.

Pros

  • Large room coverage
  • Low maintenance, easy to clean
  • No filters to replace
  • No white dust
  • Humidifies quickly
  • Compatible with essential oils
  • Quiet
  • Energy efficient
  • Long warranty

Cons

  • Expensive
  • Small tank
  • Fewer features
  • No humidistat/hygrometer

If you’re looking for heavy duty humidification minus the over-the-top price tag, then the Levoit LV600HH ultrasonic humidifier just might be your cup of tea. The LV600HH is a robust and powerful humidifier capable of producing both warm and cool mist. While it doesn’t claim to remove any air pollutants, it is able to effectively lessen the concentration of dust mites and molds as it humidifies the air. It also boasts a compartment for essential oils which further boosts its ability to keep allergies at bay. Best of all, you can set it and forget it, thanks to the automatic humidity control feature.

Unfortunately, the LV600HH requires substantial maintenance, with several nooks and crannies making it a chore to clean. Also, being an ultrasonic humidifier, the LV600HH also produces white dust. These flaws are easily overshadowed, by the fact that the LV600HH is built to last and does its job extremely well.

Pros

  • Large room coverage
  • Easy to clean tank
  • Quiet and durable
  • Accurate humidity display
  • Automatic humidity control
  • Remote Control
  • Can diffuse essential oils
  • More affordable than other models of the same calibre

Cons

  • High maintenance
  • Difficult to clean
  • Difficult to fill
  • Releases white dust

The Winix AW600 is a unique 2-in-1 humidifier that doubles as an air purifier. It works on the same principle as both the LW25 and the W200 in that it uses rotating disks that effectively remove air pollutants while at the same time adding moisture to the air that passes through it. It’s capable of servicing areas up to 600 sq. ft. in size with its 1.3-gallon tank and high daily humidity output.

Before you get too excited about the AW600, it’s important to note that there have been several complaints from users regarding its durability. Moreover, the AW600 reportedly has below-average performance when it comes to humidifying. The main advantage of the AW600, however, is that it uses a high efficiency carbon and HEPA combination filter as well as Winix’s signature PlasmaWave technology (which is just a fancy name for an ionizer). This means that it does a better job of removing airborne pollutants like dust mites, pet dander, pollen, smoke, and other odors.

Pros

  • Large room coverage and large tank
  • Excellent for removing allergens and other air pollutants
  • Ionizer does not emit ozone
  • Modern, sleek design
  • Automatic humidity control
  • Accurate humidity sensor
  • Timer
  • Has a lot of smart features

Cons

  • Subpar humidification performance
  • Expensive
  • Short warranty
  • Filters need to be replaced yearly
  • Durability issues

Capable of servicing areas up to 650 sq. ft in size, the H4810 boasts a large 2-gallon tank which allows it to run for 120 hours between fillings. Even the daily humidity output of the H4810 is impressive as it’s able to churn out 2.5 gallons of either warm or cool mist daily.

Allergy sufferers will find that all these attributes work in their favor. Larger room coverage from the H4810 means less space for allergens to lurk, and the 120-hour runtime allows relief from allergy symptoms for longer periods of time. In addition, the same Silver Clean Technology from the H940 that prevents the proliferation of bacteria, mold, and mildew within the water tank is present in the H4810, thus ensuring that the mist it releases is as clean as possible.

Unfortunately, the H4810 is not without flaws. Like the other ultrasonic humidifiers on this list, it also releases white dust and is hard to clean due to its many hard to reach places. Interestingly enough, there have also been several complaints from users about its faulty low water indicator which can light up even when the tank is full. Overall, the H4810 is a good choice for a humidifier and is priced reasonably enough that it wouldn’t hurt to give it a try. Minor flaws aside, the H4810 is quiet, reliable, effective, and powerful.

Pros

  • Large room coverage
  • High daily humidity output
  • Timer
  • Large tank
  • Quiet
  • Silver Clean Protection prevents growth of bacteria, molds, and mildew
  • No filters to replace
  • Reasonably priced

Cons

  • Releases white dust
  • Hard to clean
  • Hard to fill
  • Problems with low water indicator

Humidifier for Allergies Buyer’s Guide


Humidifiers and Allergies

Maintaining the right humidity levels at home is essential for the treatment of allergies. When the air is too dry, allergies like allergic rhinitis are further aggravated because your nasal passages are irritated, and thus can potentially lead to a sinus infection. Conversely, when the air is too humid, it creates a perfect environment in which allergens such as mold, mildew, and dust mites can thrive.

Keeping the humidity between 30%-50% with the help of a humidifier can help clear your nasal passages and relieve any discomfort you may feel from allergic reactions. Having clear nasal passages helps rid your body of any allergens to which you might have been exposed. Furthermore, having a well-balanced level of humidity in the air will ensure that mold and dust mites are kept at a minimum.

How Humidifiers Work to Limit Allergens

A good humidifier will be able to significantly reduce the growth of allergens by creating an environment in which they are unable to thrive. As previously mentioned, common allergens like dust mites and mold are unable to grow when humidity levels are maintained around 30%-50%. By keeping the humidity at this level, humidifiers are able to aid in preventing these allergens from surviving in your home.

Not all humidifiers, though, are able to remove allergens, per se. In order to actually remove allergens, the humidifiers need to have some sort of mechanism that separates them from the air. Evaporative humidifiers that use a wick filter are able to do this since both the water and dry air pass through the filter before being released back into the room. Minerals and other pollutants are then trapped in the filter to allow clean, moisturized air to leave the humidifier.

An air washer is a type of humidifier that is also marketed as an air purifier because it can effectively lessen air pollutants in the vicinity. These air washers use an evaporative system but are usually more expensive than regular evaporative humidifiers. With these air washers, air pollutants get trapped in evaporative mats or disks and are left in the humidifier.

Key Attributes

If you’re looking for a humidifier to relieve you from your allergy symptoms, then you’d better look for the following attributes:

  • Large room coverage – Although this is generally desirable for a humidifier regardless of planned use, larger room coverage will ensure that larger areas of your house remain comfortable for you.
  • Large tank capacity – This is also desirable for all humidifiers, but a larger tank capacity will mean less trips to the sink for you.
  • Medicinal cup or compatibility with essential oils – You can add medicinal inhalants to medicinal cups built into humidifiers for added relief from cold, flu, and allergy symptoms. The same goes for humidifiers that are compatible with essential oils. Essential oils like lavender and peppermint can help alleviate allergic reactions.
  • Easy to clean – This is an important requirement if you’re planning to use a humidifier for your allergies. A humidifier with too many nooks and crannies will be difficult to clean and might leave more places for mold, mildew, and bacteria to grow. When left unchecked, these microorganisms can be released into the air when you use your humidifier.
  • With an antimicrobial feature – Although it isn’t required, having an antimicrobial coating or feature on your humidifier can be beneficial to ensure that growth of mold and bacteria is kept to a minimum.
  • With a filter – If you want your humidifier to more effectively get rid of allergens, then you’ll want one that has a filter. A filter will be able to effectively remove air pollutants as well as prevent white dust from spreading.

FAQ

What is white dust and how can you prevent it?

White dust is caused by the mineral content in water that goes into a humidifier. When a humidifier uses tap water or unfiltered water, the mist it produces often leaves dried mineral deposits or “white dust” on furniture and other surfaces. For most people, white dust isn’t a cause for concern, but it may be problematic for people who suffer from allergies, asthma, or other respiratory health conditions.

To prevent the spread of white dust, it’s best to use distilled or demineralized water for your humidifier. Unfortunately, this may add up to quite a hefty sum in the long run since distilled water is more expensive. Another option would be to purchase a demineralization cartridge for your humidifier which can trap minerals before they become airborne. Otherwise, you can opt for an evaporative humidifier which has a wick filter that removes minerals from water before releasing it into the room.

How often should I clean my humidifier?

Truth be told, a humidifier could potentially be a double-edged sword when it comes to allergies. Due to the water it holds, a humidifier can be a breeding ground for dust mites, mold, and bacteria. When a humidifier isn’t properly cleaned or maintained, these microorganisms are released into the room, doing more harm than good.

That’s why it’s important to stick to a strict cleaning schedule for your humidifier. The best way to go about this is by reading through the humidifier’s instruction manual.

Generally, manufacturers will suggest thoroughly cleaning the humidifier once a week with white vinegar and bleach. The white vinegar is for descaling the humidifier and removing any mineral deposits that might have stuck to the walls of the water tank and other parts of the humidifier. The bleach is for disinfection, making sure that the humidifier is free from any bacteria or mold. However, for safety purposes, it’s important to rinse the humidifier parts after bleaching so that you don’t end up inhaling any harmful chemicals.

Should I get a humidifier or an air purifier for allergies?

While humidifiers and air purifiers go hand in hand in improving overall air quality, their functions are different, and it would be impossible to expect one to be able to replace the other.

If you’re looking to remove pollutants like pollen, dust, smoke, volatile organic compounds, and odors, then you’re better off with a HEPA air purifier. A good HEPA air purifier will be able to lower the particle count in a room to zero in seconds. If air pollution isn’t too much of a problem and you’re just looking to make your home a little more comfortable, then a humidifier might be a better fit. However, If you’re really looking for one device to both purify and humidify the air, then you might be interested to know about air purifier-humidifier combos. Read our review on the best air purifier-humidifier combos here.

What is an ideal tank capacity?

The ideal tank capacity will be different for each person and will depend on what you’re planning to use the humidifier for. If you’re planning to use it for traveling, then a smaller tank would be better. You might even consider a water-bottle humidifier.

However, generally speaking, a tank capacity of at least 1 gallon would be best. Humidifiers with a tank capacity of 1 gallon or more will be able to run for up to 30 hours before having to be refilled. Of course, this duration would depend on the model and brand of humidifier that you’re using, so it’s best to check these numbers first before making a purchase

Final Thoughts

It’s undeniable that humidifiers play an important role in making your home a more comfortable place to live, but they also can be crucial in creating an environment in which it is difficult for allergens to thrive. After searching high and low for the best humidifiers for allergies, we’ve come to the conclusion that the best humidifier for allergies is the Venta LW25. While it may not be as affordable as we would like, the exorbitant price tag is there for a reason. Studies have proven the LW25’s capacity to drastically lessen the amount of air pollutants in a room while at the same time maintaining comfortable humidity levels. With the LW25, you get your money back in the long run because it’s incredibly energy efficient, doesn’t need any replacement filters, and requires minimal maintenance.