How Different Types of Cool Mist Humidifiers Work

Living in a dry place and continuously breathing in dry air can be dangerous to health. The dry air of low humidity has many negative effects on humans and pets.

The most common sign of breathing dry air is the rise of respiratory ailments such as asthma, allergies, and bronchitis. Other notable effects of low humidity are difficulty in breathing and drying of skin and lips.

These are the physical effects that living beings can feel but low humidity also affects our homes. Dry air has a tendency to dry out wood in the house as well. This can make even newly- built houses sound creaky and old.

The fastest, easiest, and perhaps the best way to eliminate the effects of dry air in the house is to get a cool mist humidifier. It is a smart idea to invest in a few units for every room in the house but it does make one wonder, “How does a cool mist humidifier work?”

Three Types of Cool Mist Humidifiers

Before getting into the details about how a cool mist humidifier works, learning that there is more than just one option gives you the opportunity to choose between the different types.

Unlike warm mist humidifiers, cool mist humidifiers come in three common types: impeller humidifiers, evaporators, and ultrasonic humidifiers. Here, each type of cool mist humidifier will be discussed and you will learn about how a cool mist humidifier works.

Impeller Humidifiers

This type of humidifier is usually very affordable. It works with the help of high-speed rotating discs. The disc sprays water onto a diffuser that breaks the water into small microscopic droplets that get expelled into the room for added moisture.

This type of humidifier is considered very child-friendly as it does not produce heat, which makes it safe to touch.

No filters are required when using an impeller humidifier but distilled water is a must to prevent impurities from collecting on the surface of the unit. When overused, the impeller humidifier can also cause allergy and asthma attacks. Therefore, use this type of humidifier with caution.

Evaporator Humidifiers

This type of cool mist humidifier uses a fan to draw in the air within the room and then blows it through a wick that is soaked in water. During this process, some of the water is evaporated and the vapors are added to the air to help increase its humidity levels.

The evaporator humidifier also doubles as a cooling agent as it sucks out the heat from the room when it evaporates the water and the air becomes nice and cool.

This type of humidifier is also very affordable and readily available in the market. It is child-friendly but provides just enough cool mist for one small room. Sometimes an evaporator humidifier can expel too much moisture. This can encourage mold growth within the room if not kept in check.

Ultrasonic Humidifier

When it comes to thinking about how does a cool mist humidifier work, ultrasonic humidifier is the type of humidifier that is never left out of the conversation.

This type of humidifier works by using an ultrasonic vibration to produce a cool mist. The high-frequency vibrations help the water to evaporate and expel into the room to increase the air’s humidity without tampering with its temperature.

These humidifiers usually cost more than the two previously mentioned units but they are more popular choice.

This is because ultrasonic humidifiers are very silent and offer a lot of different settings that allow full control over how long and how much mist is expelled into the room.

The ultrasonic humidifier is also child-friendly because it does not use any heat to create the mist. Therefore, there is no danger when it comes to operating it.


When it comes to learning how a cool mist humidifier works, there are different ways about how cool mist can be created. No matter what type of humidifier you buy, when you choose the cool mist option, you are choosing one that is child and pet-friendly.

You are also choosing one that is less dangerous to have at home. Improve your home life by improving the quality of the air you breathe and it all starts with a cool mist humidifier.