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Pure Guardian H4810AR Review: Year-Round Misting

Most people think humidifiers need only be used in the winter months when the air quality is at its most dry, causing the majority of people to deal with skin itching, flaking, and static electricity shocks. Perhaps the worst part of it all is the lack of moisture leaves you susceptible to catching a cold or the flu because your nasal passages have dried out.


But the summer months can be just as trying, with hay fever causing allergy flare-ups, body dehydration from the warm temperatures, and air conditioning being blasted resulting in, you guessed it, dried out nasal passages. They can be a 365-day problem.

The benefits of having a humidifier are plenty, and for those that live in a 4-season climate, having a dual temperature humidifier can be a godsend.


Standing 12.5 inches tall, and filling rooms up to 600 square feet, the H4810AR model from Pure Guardian gives off both warm and cool mist and is deceptively small for what it puts out. It has a 12-liter tank that can return multiple days of use, so you don’t have to worry about daily refills, and it will keep your room’s humidity level balanced at all times. With its ultrasonic technology, it is virtually noiseless so you won’t be distracted by it at any point during your day.

But this is just another ultrasonic humidifier, right? What’s so special about it? Keep reading to learn all about this gem from Pure Guardian.


Ultrasonic? Ultra-quiet!

The ultrasonic technology used in this humidifier is the quietest technology you can find in today’s modern humidifiers. They use high-pitched frequencies to vibrate a metal diaphragm that propels moisture into the air. This eliminates the need for a fan, which many wick humidifiers use. As a result, the humidifier’s noise output is drastically decreased, with many outputting virtually zero noise.

The ultrasonic technology also doesn’t require a filter, which has its pros and cons.


You don’t have to clean a filter, or replace it every few months, saving you both time and money.


The lack of filter means you might be propelling bacteria and mold that may be growing in the tank. This is why it is critical to regularly clean the unit. Also, with no filter, scale/white dust from hard water will be dispersed into the air, coating your furniture and floors. Using only distilled water will eliminate this problem.


Year-Round Misting

The dual nature of this humidifier allows you to use it in all 4 seasons: cool mist in the warm months, and warm mist in the cool months. How does this benefit you?

The warm mist will (obviously) heat up rooms, but it also plays an integral role in reducing the instances of colds and flu. The winter months bring dry air that causes static electricity, itching skin, and dried out nasal passages. Those with dried out nasal passages are more susceptible to colds and flu, so adding moisture to your rooms will keep your mucus membrane well-balanced, protecting you from getting sick.

In the warm months, the cool mist setting provides moisture that aids in keeping you hydrated, which can be an issue in hot climates. Warm months also bring about hay fever, which is an allergic reaction to airborne mold spores, as well as pollen from weeds, trees, and grass. Air conditioning can also dry out your nasal passages, so having a year-round humidifier is an excellent way to help relieve congestion while providing protection for you and your family.

Pushing Buttons

The front of the unit has all the settings you need to keep your room’s humidity level balanced. It has 3 separate speeds, ensuring you get as much (or as little) moisture from the low, medium, and high output settings. Pure Guardian also includes 3 timer modes: 4 hours, 8 hours, or 12 hours. These come in handy so you can prolong the tank’s life, and you won’t have to worry about shutting it off manually. The unit will also shut off automatically when the unit is low on water, and a refill light will illuminate to alert you.

Refill Once A Week

If there is one thing about humidifiers that irritates people, its the fact you need to refill them every day or so. It’s just so inconvenient. This unit changes that, giving you excellent longevity and continuous use so you only need to fill it up once a week. The tank holds 2 gallons (12 liters) of water, for an insane 120 hours of continuous use. That’s 5 days worth!

How Does It Stand Out

The Little Things

As the saying goes, it’s the little things in life that go a long way. This humidifier does a nice job of including an array of bells and whistles that all add up in a big way.

Adjustable Nozzles:

Dual nozzles on the top of the tank allow you to position the mist output a full 360 degrees. This comes in handy when you are positioning the unit in your room. You can tuck it into a corner and aim the moisture to where you need it most, simultaneously keeping it away from your walls.

Night Light:

The tank has an LED light that provides a soothing blue glow to help you get some shut-eye. It also keeps your room dimly lit and easy to navigate during those middle of the night bathroom breaks. For the people that need total darkness when they sleep, this light can be turned off.

Automatic Shut Off:

This safety feature is a huge bonus so you won’t accidentally burn down your house. It automatically senses the water level in the tank and will shut down the unit when it is close to empty.

Silver Clean Technology:

Humidifiers are prone to growing mold and bacteria in their tank due to the wet environment. By lining the inside of the tank with micro-silver crystals, it helps to fight off these.

Aromatherapy Friendly

With the popularity of essential oils, many humidifiers are including an aromatherapy box where you can add a few drops that get dispersed with the mist. The back of this unit has an “oil tray” where any oils can be added. Popular name brands make aromatherapy oils that help with cough and congestion, while essential oils can provide similar relief, with eucalyptus, rosemary, and peppermint being popular “all-natural” options.


Long Term Warranty

Pure Guardian covers this unit from defects in materials and workmanship for 3 years, which is a pretty long term considering many rival companies will only cover 1 year. Of course, like all warranties, it doesn’t cover any damage that may arise due to user error, so make sure you aren’t abusing the machine. Still, the inclusion of a long term warranty is something most companies won’t consider, so it’s nice to see Pure Guardian standing behind their product so you can feel confident in your purchase.


Can this unit operate non-stop, or do I have to choose one of the timers?

You can do either. Choosing one of the timer options will automatically turn it off after 4, 8, or 12 hours. If you just turn it on and let it run, it will automatically shut off once the tank is out of water.

Does this model have an aromatherapy box? If not, can I add essentials oils directly to the water?

This model does include an aromatherapy box. On the back of the unit, you will find an “oil tray” where you can add a few drops of your preferred oils. We would advise against adding any essential oils to the water, as they can potentially damage your humidifier.

How often do I need to change the filter?

You don’t! This unit doesn’t use a filter, so we recommend only using distilled water with it to eliminate the white dust that comes from the evaporation of hard water.

How do I clean this humidifier?

Pure Guardian lines the tank with silver clean technology to combat the growth of bacteria using micro-silver crystals. We also recommend soaking the inside of the tank with a vinegar and water solution for 20 to 30 minutes. This helps kill off any bacteria and mold that may have built up, and also loosens any debris so it scrubs off easily.

Does this model come with a remote control?

Unfortunately, it does not.


It should be evident by now that Pure Guardian has put a lot of thought into this model, and its a solid choice if you are looking for a dual mist humidifier for year-round use. It’s well built, backed by a multi-year warranty, and provides days of uninterrupted humidity. Not to mention it helps relieve congestion, cough, and allergies no matter what time of year it is.

With an attention to detail in the little things like adding directional nozzles, their Silver Clean tank, as well as a noiseless operation, this ultrasonic humidifier is a great option to ensure you have well-balanced moisture levels in your home at all times.

If this humidifier is not what you were looking for, check these out:
Best Humidifiers for Allergies
Best Filterless Humidifiers
Best Warm Mist Humidifiers
Best Humidifiers for Baby

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