How Does a Humidifier Work?

You may have been wondering how a humidifier works. Humidifiers work in different ways to add moisture to the air. Evaporative humidifiers are the most common and work by pulling dry air from the room and returning air that has been humidified and combined with moisture. In this post, you’ll learn how various humidifiers work.

How Does a Humidifier Works?

Low humidity makes people feel uncomfortable. During winter months, colder air leads to a drop in indoor humidity. The lack of moisture in the air can dry out your skin and membrane. Dry air can also take a toll on other things in your home, such as your wooden floors, furniture, and electronics. Knowing how a humidifier works can help you tackle the dry air in your home. How do you know which one to choose?

All humidifiers actually work the same way, no matter the type of technology used in their construction. The device forces humidified air into your home by combining it with moisture. What separates one humidifier from the other is the means by which it combines the air and moisture. For example, evaporative humidifiers use internal fan blades to pull air into the unit. Then, they force it to pass through its moistened wick filter, combining the air and moisture. The fan then pushes the moist air back into your home atmosphere.

Ultrasonic humidifiers use an ultrasonic technology instead of a fan. This method produces a fine mist of water droplets into your home. The humidifier type you should choose primarily depends on the kind of mist you desire.

There are two types of mist that a humidifier releases, cool or warm mist. The cool mist humidifiers provide mist at or below the indoor temperature. The mist released can make the room fall below a reasonable temperature, which can be hazardous when used around babies. On the other hand, warm mist humidifiers disperse heated moisture that can increase the room temperature.

To help you decide, remember that a cool mist unit is ideal to be used all year round. Warm mist can be helpful during cold winter months. These models heat the water to a boil before releasing the vapors into the air. The in-duct type of humidifiers works in a similar manner. They attach to your forced-air furnace system to humidify your entire home.


Humidifiers work to produce humidity in your home. They function by forcing dry air through moisture and then recycling it back into the air. They can help if you are experiencing allergies, dry skin, or asthma symptoms due to a lack of humidity.