PureGuardian Humidifier Review: A Reliable Option For Air Quality

PureGuardian UltraSonic Cool Must Humidifier on top of a desk

A PureGuardian Humidifier review lets you know what type of humidifier is best to keep indoor plants healthy. Houseplants thrive in an atmosphere that’s between 40 and 60 percent humidity. Without a humidifier, plants (and people) may develop problems due to dry air. Humidifier mist prevents leaves from drooping.

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This PureGuardian Humidifier review describes a few home humidifiers. Mist vapor humidifiers keep your house humid enough for houseplants. These humidifiers will also keep your family healthy.

PureGuardian humidifiers aren’t just for houseplants. You can also use these humidifiers to relieve dry skin, asthma, allergies, and colds. Our review lists all the ways you can use  PureGuardian humidifiers, although the emphasis is on how the product can be used to help houseplants grow.

What Is a PureGuardian Humidifer?

This PureGuardian Humidifier review takes a look at two mist humidifiers suitable for keeping houseplants healthy. These humidifiers keep your house at the proper level of humidity, to guard against dry air that increases the chance of colds, asthma, and allergies. The soothing mist helps reduce nosebleeds during the winter.

The Pure Guardian 70-Hour Ultrasonic Cool Mist Humidifier is great for most rooms in your house, except large living rooms. This machine has controls to adjust the speed and direction of the mist for more precise humidity options.

You can buy decalcification cartridges from Guardian Technologies to prevent white dust. White dust occurs when you use tap water in humidifiers. This dust may coat furniture and other items in your room.

The function buttons and light button are located on the base. The functions are:

  • Low
  • Medium Output
  • High Output
  • Off

product photo of PureGuardian H965 Ultrasonic Cool Mist Humidifier

Image Source: Amazon.com

Wash around the ultrasonic disc every few days wit the including cleaning brush. Use vinegar and water for a thorough cleaning once a week to prevent pink film or brownish stains.

How to Select a Mist Vaporizer

steam coming out of a humidifier

Image Source: Pixabay.com

Affordable warm or cool mist vaporizer humidifiers boil water in reservoirs to produce a stream. The steam raises the humidity in the room. Vaporizers kill viruses and bacteria. Cool mist kills bacteria and raises the temperature of the room slightly. Mist vaporizers have a few negatives, such as accidental burns and high operating cost.

  • Consider the size of the room where you keep your plants and other requirements before buying a mist humidifier. Cacti and other desert plants need a minimum of 40 percent humidity. Other houseplants require 50 to 60 percent humidity.
  • Buy a small humidifier for a 300-square foot room. Use a medium-sized humidifier for a 399 to 499 square foot room. A room with more than 500 square feet needs a large humidifier.
  • Using the right-size humidifier will help keep a small room from getting too humid and a large room from experiencing low humidity. Humidifiers use rotating fans to discharge moisture. Your plants will wilt if the humidifier is too close to your plants. Don’t place your humidifier too close to the plant or facing the plants.
  • You’ll need to clean your humidifier regularly to prevent bacteria buildup and change the filter according to manufacturer’s directions.
  • Guardian Technologies makes small appliances to give your home a healthier environment. The company sells air purifiers, filters, oil diffusers, sanitizers, and humidifiers. Guardian Technologies offers one to three-year warranties and excellent customer service on all its products.
  • Cool mist vaporizers are ideal for exposing your houseplants to more humidity, but you can also use them in kids’ or babies’ rooms to relieve dry air and guard against asthma, allergies, and colds.

Humidifier Tips

Humidifiers may be noisy due to the sound of the rotating fans that produce moisture. You’ll be able to tolerate a vaporizer’s noise if you can ignore a fan’s white noise.

  • Choose a humidifier with timers, bells, or other reminder mechanisms that indicate when you need to change water or turn off the unit.


  • The wrong level of humidity will harm your plants. Low humidity may spread bacteria and viruses, which causes disease. Plant water dries out quickly when humidity is low. A dried-out plant causes leaves to droop and become weak.
  • High humidity spurs bacterial growth, dust mite attacks, and buildup of mold.
  • There are two other types of humidifiers, but they’re not recommended for houseplants. Evaporative humidifiers use wicks that double as filters. These humidifiers absorb water in the tank. A fan blows on the wick to create the evaporation. Vapor then comes out of the top of the unit.
  • Evaporative humidifiers won’t cause burns or produce white dust. These humi​​​​difiers are made with treated plastic to guard against bacteria. On the negative side, evaporative humidifiers are loud and need replaceable filters.
  • Impeller humidifiers consist of a disc that flings tank water at a diffuser. This process makes a cool mist that come from the unit. Keep impellers clean, since they can breed bacteria quickly. You can use impellers with essential oils. These humidifiers are quiet and don’t offer any burn risk.
  • Impellers make white dust and don’t produce as much vapor as cool or warm mist humidifiers.
  • Ultrasonic humidifiers, like mist vaporizers, are suitable for plants and humans. Many ultrasonic humidifiers double as cool mist vaporizers. These humidifiers emit high frequencies against a small metal plate — the vibrations bust-up water molecules into the mist. Only use filtered water in ultrasonic humidifiers.
  • Tap water leaves white dust on furniture and other items near the humidifier. You don’t need to buy filters for an ultrasonic humidifier. These units are quiet and don’t need much maintenance. You shouldn’t have problems unless you use tap water instead of filtered or distilled water in the machine.

Product Specifications

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  • The Pure Guardian 70-Hour Ultrasonic Cool Mist Humidifier releases a fine mist to keep the air humid enough to help your houseplants grow. Use the misting settings to choose the right amount of mist for your plants.
  • The one-gallon tank gives you up to 70 hours of misting time. Use this humidifier in medium-sized rooms. Place this unit in your bedroom or living room if you have several houseplants.
  • The cool mist will help your plants grow to be healthy and beautiful. The mist also keeps the air in the room humid enough to prevent colds, dry skin, and other potential health problems.
  • This unit produces a mist through a vibrating metal diaphragm vibrating. There aren’t any noisy rotating fans.
  • The Pure Guardian 70-Hour Ultrasonic Cool Mist Humidifier is compact enough for small spaces, and you can even use it when you travel. Place the humidifier on a hard, flat surface. Don’t put the machine on a towel or any absorbent material. The humidifier will work in any room with the door open or closed.
  • The machine’s cool mist is absorbed almost immediately into the air. The water molecules produced by this Pure Guardian humidifier are about one micron in diameter.
  • The humidifier has Silver Clean Protection to stop mold and mildew from growing on the surface of the tank. This quiet humidifier has a timer. Set the humidifier to operate at night, or while you’re at work.
  • There’s an aromatherapy tray (oils not included) if you want to use the humidifier to add a pleasant smell to your home, or to use for therapeutic purposes. Only use the tray to add oils. Don’t add oils directly to water.
  • The night light included with this vaporizer makes it easier for kids with colds or allergies to move around if they wake up at night.

Tabletop Vaporizer/Humidifier from Guardian

Guardian Technologies also makes a tabletop mist vaporizer you can use on your indoor plants.

The PureGuardian Cool Mist Ultrasonic Vaporizer Humidifier works in small rooms. The humidifier tank provides a .21 gallon capacity. This tabletop vaporizer offers a ten-hour runtime.  This unit stays clean for a long time because it’s made of treated plastic. The tabletop unit measures 5.2 inches wide by 5.2 inches deep by 10.8 inches high. This humidifier has a two-speed setting and a nightlight.

This Guardian humidifier runs quietly and can be used in an office or bedroom. A tabletop vaporizer is perfect if you keep several plants in your office. Since the vaporizer runs silently, it won’t interfere with your work or your meetings. (There’s no fan in this model.)

The unit may create white dust if used with tap water. Clean the water tank at least once a week. The inside of this unit is treated with an antibacterial solution to prevent mold and bacteria.

You can get through a night or a workday without having to refill this unit. You don’t need to worry about replacing a filter. The machine has a three-year warranty, so you can repair or replace it if you have a problem. This tabletop unit also has a low-water indicator.

The button turns red and makes a clicking sound when water is low; then it shuts off automatically.

Use the brush that comes with the machine to clean the unit every week.


Cool or hot mist vaporizers are considered to be the most affordable humidifiers. Most popular models are tabletop or medium-sized and suitable for people on tight budgets. Even large mist vaporizers are less expensive than other types of humidifiers.

How it Compares

Here’s a look at the PureGuardian Cool Mist Humidifier and two other cool mist humidifiers used to provide a better atmosphere for houseplants.

PureGuardian UltraSonic Cool Must Humidifier

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This ultrasonic warm mist humidifier offers 70 hours of run time per gallon of distilled or filtered water. The Silver Clean Protection coated on the tank helps prevent mold, mildew, and bacteria from forming inside the unit.

This machine features a refill indicator light, nightlight, and automatic shutoff mechanism to prevent accidents. The multi-directional, three-speed mist control lets you aim the mist in the area you want, at the right speed for your plants.

Honeywell Germ-Free Cool Mist Humidifier

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Run this one-gallon tank on the low setting for up to 24 hours. This humidifier is an excellent choice for bedrooms and all medium-sized rooms.  UV technology kills most bacteria in the water. The evaporative technology in the Honeywell Germ-Free Cool Mist Humidifier blows moisture off the filter, too. This technology ensures that the unit won’t add more moisture than necessary in your room.

This Honeywell humidifier has a fan with a white masking noise. You can put it next to your bed at high speed all night if you have houseplants and the sound won’t wake you. This humidifier will keep the humidity levels in your home at between 40 and 60 percent. This humidity level is excellent for your plants and your health.

Vicks Warm Mist Humidifier, One Gallon

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You can use this humidifier for babies’ and kids’ bedrooms as well as houseplants. This machine turns itself off when it runs out of vapor. Use this machine on the low setting to provide humidity for houseplants.

This unit is easy to take apart and clean. You can use this humidifier for 24 hours straight. The Vicks Warm Mist Humidifier has automatic shut off, a nightlight and two comfort settings. There’s a medicine cup that lets you make VapoSteam if a family member has a cold.

Benefits and Drawbacks

Here’s a look at the pros and cons of the PureGuardian UltraSonic Cool Mist Humidifier. We’re mostly concerned with how the humidifier helps houseplants grow, but we also considered the product’s other benefits.


  • Low water indicator
  • No filter needed; save money on replacement filters
  • Shuts off automatically when empty
  • Ultra-quiet
  • Adds moisture to the air for 15 to 70 hours
  • Silver Clean Protection surface guards against mold


  • No handle
  • Produces white dust
  • May leak water
  • A high-maintenance product that takes too long to clean.


We give this product, the PureGuardian UltraSonic Cool Mist Humidifier, a four-star rating for several reasons. The 70-hour running time means you can fill the tank and forget it for close to three days. The UltraSonic technology offers quiet operation so that it won’t wake you or other family members at night.

This PureGuardian Humidifier review was designed to give you information about this humidifier so you can make an intelligent buying decision about managing your indoor plants. Check out Amazon.com or the manufacturer’s website for more details.

Featured Image from Amazon

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pureguardian-humidifier-reviewPureGuardian UltraSonic Cool Mist Humidifier features a low water indicator light and a Silver Clean Protection surface guards against mold. It doesn't need a filter and it is designed to be ultra-quiet. Although its is a high-maintenance product that takes too long to clean, it is still great investment.