Pureguardian 100-Hour Ultrasonic Top Fill Cool Mist Humidifier Review

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Prolonged exposure to extremely dry air can have harmful effects on your system

A humidifier is a necessity for people in parts of the world where cold weather is accompanied by extremely low humidity, especially inside with the heater running all day and night. 

If this sounds like your situation, then take a look at the Pureguardian 100-hour Ultrasonic Top Fill Cool Mist Humidifier.  It’s a great one-room humidifier that does a great job and doesn’t cost a fortune.

This Pureguardian 100-hour unit uses ultrasonic technology to create a fine mist of moisture while operating very quietly. 

This model is unique because it uses a silver-clean protected tank that fights microbial growth to prevent slime cold, mold, and mildew. 

Like the FridaBaby 3-in-1, the Pureguardian 100-Hour humidifier is also a cool-mist humidifier that serves as a humidifier, diffuser, and nightlight.

Are you interested in learning more? 

Keep on reading to see what we think about this humidifier – and how it compares with the competition. 

Pros and Cons



Unique Features

pureguardian ultrasonic humidifier review

The Pureguardian humidifier is an exceptionally well-made product. Several features make this unit unique and allow it to stand out from its counterparts. 

Let’s look at a few of them.

Ultrasonic Technology

This humidifier uses ultrasonic technology to produce a cool mist using a metal diaphragm that vibrates at a high frequency. 

Due to the fine size of the water vapor, the moisture is absorbed by the air immediately. 

The Pureguardian humidifier also doesn’t use a fan, which makes it operate almost silently.

Aromatherapy Tray Option

The Pureguardian cool mist comes with an aromatherapy tray option. 

You can add a few drops of your favorite essential oil to the tray to create a peaceful and relaxing atmosphere.

Silver Clean Technology

pureguardian ultrasonic humidifier review

The water tank is protected with Pureguardian’s unique silver clean technology

A common problem with most humidifiers is microbial growth on the surface of the water tank.

However, the silver clean technology provides the unit with continuous odor-free, antimicrobial properties to prevent slime and bacteria growth.

Comparing Pureguardian vs. Its Competitors

There are several cool-mist humidifiers on the market – so what makes Pureguardian 100-hour ultrasonic stand out? 

The first thing that stands out about the Pureguardian 100-hour ultrasonic humidifier is that it can keep a large living room up to 630 sqft in size comfortable for up to 5 days before needing a refill. This isn’t the case with most brands. Very few few humidifiers have a tank capacity that can last this long and even fewer that can handle a room that size. 

Second, this unit is well-designed and compact, which makes it easy to store. 

Third, it comes with variable control mist and dual mist temperature – features most of its competitors lack.

Issues & Concerns

pureguardian 100 hour ultrasonic humidifier

The Pureguardian humidifier is an excellent product. However, it has its drawbacks. These aren’t major setbacks, but they are still worth mentioning. 


After the base runs out of water, you may notice a ring of bacteria at the bottom. This doesn’t impact the air quality, but it can be hard to clean because the crevices are hard to reach.


It is a bit complicated to refill the tank, as it needs to be held in a certain position. This can get quite awkward. In our opinion, it would help to have a water opening at the top.

Warm Mist Temperature

This unit is advertised to have a warm and cool mist, however, most people will find the warm mist isn’t warm at all. 

It is more like a room temperature mist, which may be of concern to some. 

Care and Maintenance

pureguardian 100 hour ultrasonic humidifier

Proper maintenance and care of the humidifier are important for it to last a long time. 

Cleaning is an important part of maintaining the humidifier, and it may be intimidating to people at first, but it really isn’t difficult. 

Here are a few things to keep in mind when cleaning this product.


This humidifier comes with an above-average 3-year warranty.  But there are strings attached.

Guardian Technologies LLC warrant this product not to have any defects in materials and artistry, and the warranty applies from the day of purchase. But it is essential to keep the original receipt to validate the warranty period.

The warranty does not cover unauthorized repairs, and Guardian Technologies LLC must do all repairs.

The warranty also doesn’t cover damage and defects caused by accident, unreasonable, and unadvised use of the product. 

For the warranty to be valid, it is essential to use the humidifier with genuine Guardian Technologies accessories. 

For the warranty to be valid, it is also essential to register it online and purchase the unit from authorized dealers only.


Where to Buy

You can buy the Pureguardian 100-hour ultrasonic top fill cool mist humidifier here.

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