Pureguardian Ultrasonic Humidifiers | Reviews of the Top Models

| Last Updated: May 26, 2021

A humidifier can help to ease the symptoms you or those around you go through during dry climate conditions, such as congestion, sore throat, cracked skin, coughs, and excessive snoring.

Apart from the dry air outside, your air conditioner or furnace might also contribute to the dry environment in your house.

For this reason, you need to choose a high-quality humidifier, and one choice you cannot go wrong with is Pureguardian!

Comparison of the Best Pureguardian Ultrasonic Humidifiers

  • Best Overall Choice
  • One Gallon Tank Runs for 70 Hours
  • Provides Daily Humidity Output of 3.17 Gallons
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  • Best Cool Mist Option
  • Runtime of 100 Hours on One Tank
  • Comes With a Large 1.5-Gallon Water Tank
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  • Best 14-Hour Option
  • Cool Mist Humidifier
  • Made Especially for Nurseries
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  • Best 90-Hour Option
  • Has a Quiet Operation
  • Huge, Easy-to-Fill Top-Fill Tank
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  • Can Cover Large Rooms Up to 650 Sq. Ft.
  • Large Tank With Daily Output of 2.5 Gallons
  • Best 120-Hour Pureguardian Ultrasonic Humidifier Model
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Who is Pureguardian?

Based in Ohio, Guardian Technologies is a home appliance manufacturer featuring cutting-edge technology. Despite being relatively new to the industry, the brand has been able to establish itself as a top producer of innovative home appliances.

Their products all aim to provide affordable solutions for various issues within the home, such as poor air quality. Guardian Technologies is quite well-known for its remarkable ultrasonic humidifier line, which are sold under their PureGuardian brand.

How Does Pureguardian Compare to the Competition?

Since Pureguardian humidifiers have made quite a name for themselves, they have been able to leave many competitors behind. The question is, what makes them so different?

Highly Efficient Ultrasonic Technology

Guardian Technologies only focus on those products that help individuals have a healthier home environment via innovative technology and small home appliances.

Ultrasonic technology enables users to enjoy the same efficacy as that of a warm mist or vapor humidifier or a vaporizer. However, it takes away the danger of having hot parts and boiling water around, increasing the chances of burning someone. Moreover, humidifiers featuring ultrasonic technology make less noise compared to an evaporative cool mist humidifier.  

Keeps Your Environment Bacteria-Free With Innovative Technology

Apart from being ultrasonic, Pureguardian humidifiers come with silver clean technology that helps to fight the growth of mildew and mold in the water tank of the humidifier. As a result, the humidifiers are always kept clean, making sure that the health of your family members isn’t compromised at all.

You’ll Surely Find a Unit for Yourself

These ultrasonic humidifiers are available in a variety of sizes so that you can choose one which your house can accommodate easily. Similarly, these humidifiers come with different special features that cater to your specific needs. Rest assured, you will find a unit perfect for yourself and your family!

Review of the Best Pureguardian Humidifiers

By now you already know that Pureguardian humidifiers are high-quality, yet cost-effective humidifiers that have been able to gain unparalleled popularity. We’ve cherry-picked some of the best Pureguardian ultrasonic humidifiers to help you in making an informed choice.

Best Overall:
PureGuardian H965

Pure Guardian H965AR Ultrasonic Cool Mist Humidifier, 70 Hrs. Run Time, 1 Gal. Tank Capacity, 320 Sq. Ft. Coverage, Small Rooms, Filter Free, Silver Clean Treated Tank, Includes Essential Oil Tray


  • Simple, Elegant, and Sleek Product
  • Despite its Large Size, the Tank is Very Light
  • Two Output Settings Allow You to Set the Mist to How You Desire
  • The Lightweight Mist is Easily Picked by Air Currents and Doesn’t Wet the Surrounding Area


  • There’s No Carry Handle on the Tank
  • The Blue LED Can Interfere With Sleep

Our Review

If you’re looking for a mid-range, ultrasonic cool mist humidifier that is also not too heavy on the pocket, then the H965 is the one to go for. While the unit is only rated for covering small to medium-sized rooms, it surely doesn’t lack performance or power. It can constantly work for 70 on hours on one filling and delivers a daily humidity output of 3.17 gallons.

Like all Pureguardian humidifiers, the H965 also features the silver clean antimicrobial treatment in its water tank, inhibiting the growth of mold. Moreover, it's very simple to operate and hardly makes any noise while working, making it a good unit for those looking for a humidifier to add to their bedside table.

With the help of its ultrasonic technology, the unit emits a fine and soothing cool mist that provides relief from dry air. Plus, it comes with an optional nightlight, making it a suitable option for kids’ rooms too. There’s also a low water indicator which tells you that it’s time to refill the tank. Moreover, using the aromatherapy tray option, you can add in your favorite essential oil and create a fully relaxing environment.

Bottom Line

With this Pureguardian humidifier’s high and low cool mist settings, you can optimize your environment and make it highly comfortable. Plus, this humidifier helps those suffering from dry skin, allergies, and colds.

Best Cool Mist Model:
PureGuardian H3200WCA

Pure Guardian H3200WAR Ultrasonic Cool Mist Humidifier, 100 Hrs. Run Time, 1.5 Gal. Tank, 440 Sq. Ft. Coverage, Medium Rooms, Quiet, Filter Free, Silver Clean Treated Tank, Essential Oil Tray


  • Can Easily Cover a Large Room
  • It is a Silent Yet Effective Ultrasonic Humidifier
  • Refilling as Well as Reattaching the Tank is Very Easy


  • It Isn’t Too Durable and Can Leak After a Few Uses

Our Review

The Pureguardian H3200WCA is a sleek and attractive humidifier that’s not only powerful but also adds to the décor of your house. Plus, since it is a tower-shaped cool mist humidifier, it can be utilized anywhere around the house without being an eyesore or being in the way.

Capable of covering a space of up to 400 square feet, this ultrasonic humidifier is ideal for large rooms. It comes with a huge tank with a capacity of 1.5 gallons of water. As a result, the H3200WCA can work for a hundred hours on just one filling.

Moreover, this premium Pureguardian ultrasonic humidifier features the brand’s signature silver clean protection. This antimicrobial treatment works to keep the growth of mold nearly non-existent.  And of course, its ultrasonic technology hardly makes any noise, making it one of the best options for the bedroom.

As a Pureguardian humidifier, you can expect it to be highly feature-rich. Apart from a 12-hour timer, it comes with variable mist control and a nightlight. In addition, an indicator light informs you of when it is time to fill up the tank again. Another important feature is the auto shut-off feature. Once the humidifier is empty, the unit shuts down.

Bottom Line

Overall, for large rooms, the HW200 is a great option. It is a high-end cool mist humidifier which is not only full of innovative features, but is also powerful with an elegant design.

Pure Guardian H910BL Ultrasonic Cool Mist Humidifier, 14 Hrs. Run Time, 210 Sq. Ft. Coverage, Small Rooms, Quiet, Filter Free, Silver Clean Treated Tank


  • The Tank is Quite Easy to Fill
  • Available at a Relatively Low Price
  • The Treated Plastic Inhibits the Growth of Mold and Bacteria


  • The Unit Tends to Produce White Dust

Our Review

As the name suggests, this humidifier is the ideal option for nurseries. In fact, it will also make a great nightstand humidifier. At the lowest setting, it can run for up to 14 hours, ensuring that your kids get the best night’s sleep. Since it is a cool mist humidifier, there are no burn hazards, and you can expect efficient results.

Despite the humidifier having a small size, it is very easy to clean and fill. While these features might not seem to be so special, they are in reality, important since you’ll have to refill the unit at least once daily in the dry season. Similarly, you’ll have to clean the humidifier at least once a week.

When you use the unit with distilled water, you’ll hardly notice any buildup of hard water. Plus, the antimicrobial treatment done on the water keeps the mold at bay much longer than other humidifiers on the market. Like other units on this list, this one is super quiet which means that it will make a great addition to your bedroom.

Overall, with cleaner air in your bedroom or nursery, you and your kids can have a good sleep without having dust or other allergens cause irritating symptoms.

Bottom Line

For a humidifier that’s not only easy to fill, but also affordable, this is the one to pick. Despite producing some white dust, it is efficient at what it does and can easily meet your needs.

Best 90-Hour Model:
PureGuardian H1175

Pure Guardian H1175WCA Ultrasonic Cool Mist Humidifier, 90 Hrs. Run Time, 1.5 Gal. Tank Capacity, 390 Sq. Ft. Coverage, Medium Rooms, Quiet, Filter Free, Silver Clean Treated Tank, Essential Oil Tray


  • The Unit is Very Easy to Clean Including the Tube
  • The Blue Light Makes This An Ideal Option for Kids’ Rooms Too


  • The Motor Tends to Get a Little Loud

Our Review

The H1175 is another mid-range, cool mist humidifier that is suitable for covering small and medium-sized rooms. While it is rich in features, one key feature is the convenient water tank. Since it is a top-fill water tank, refilling it is a breeze. Of course, like all Pureguardian models, this too comes treated with the silver clean protection, making sure you stay away from the harmful effects of mold growth.

With its large 1.5-gallon tank, this cool mist ultrasonic humidifier can run for up to 90 hours and provide sufficient protection against dry air in your home. Using its ultrasonic technology, the unit disperses an adequate amount of cool mist into the air. Thanks to the same technology, the unit hardly makes any noise, so you can have it on at night without having it disturb your sleep.

The humidifier also comes with an optional aromatherapy tray, allowing you to make a relaxing atmosphere by adding a few drops of your most loved essential oil. Moreover, with the variable mist control, you can customize the mist. There’s also a nightlight as well as a low water indicator so you can easily know when you need to pour water into the top-fill tank.

All in all, with this Pureguardian humidifier, you can make a better environment that alleviates your family’s symptoms of allergies, dry skin, and colds.

Bottom Line

The H1175 is a premium and robust humidifier that can be easily described in two words; simple and convenient. As a bonus, there’s a scented pad slot as well which you can use to diffuse your favorite essential oils in your room.  

Best 120-Hour Model:
PureGuardian H4810AR

Pure Guardian H4810AR Ultrasonic Warm and Cool Mist Humidifier, 120 Hrs. Run Time, 2 Gal. Tank, 600 Sq. Ft. Coverage, Large Rooms, Quiet, Filter Free, Silver Clean Treated Tank, Essential Oil Tray


  • High Humidity Output Keeps the Room Adequately Humid
  • Thanks to the Large Size, the Humidifier Doesn’t Need to Be Filled Often
  • More Efficient and Well-Built Than Many Other Units in the Same Price Range


  • Using it With Tap Water Results in White Dust

Our Review

The 4810 is one of the pricier models that Pureguardian has to offer. This is a dual-mist humidifier which can easily handle space of up to 650 sq. ft., making it a large room humidifier. Given its capability, it is no surprise that it has a large frame and is a little heavy.

However, it makes up for its large size with several excellent qualities. Apart from a huge water tank that reduces the hassle of frequent refilling, the H4810 has an impressive daily cool or warm mist humidity output of 2.5 gallons each day. Despite being such a large and powerful humidifier, this unit runs quietly and ensures you have a sound sleep at night.

Aside from the option of choosing between cool and warm mist, users can also choose from three different output levels. Safe to say, this unit allows a truly customizable experience. Moreover, it features a 12-hour timer which means that you can have it on at night without having to get up from bed just to switch this off.

Bottom Line

If you’re extremely tired of having to refill the water tank of your current humidifier constantly or if you want to customize your humidifying experience fully, the H4810 is the best option. With three speeds and the option to choose cool or warm mist, you can optimize and personalize your comfort.


Guardian Technologies has been putting out small appliances to tackle indoor air quality problems since 2002. Despite being comparatively new to this industry, the company has established itself as a force that shouldn’t be reckoned with. Their wide range of Pureguardian humidifiers is quite varied and is designed to meet different needs. So, you’ll have no problems finding the ideal Pureguardian humidifier for yourself.

My name is Bob Wells and I am a retired HVAC tech from Washington state. I am currently retired and no longer do much with HVAC, however, I feel like I have a lot of knowledge in the subject and I wanted to create a website where I could talk about what I've learned and help upcoming HVAC techs. Find more info about me and HVAC Training 101.