Ultrasonic Vs Evaporative Humidifier – Which One Should You Purchase?

ultrasonic vs evaporative humidifierPicking out the right type of humidifier for your home can be a very tricky situation, especially if you do not know the way between an evaporative humidifier and an ultrasonic humidifier, the two types of cool mist humidifiers. If you want to purchase the right type of humidifier, you need to know the primary differences between the two.

Both the humidifiers are great when it comes to effectively moisturize the air in your room. However, both possess different characteristics that make them suitable for different types of environment and people.

Below, we have listed down many different factors as to which humidifier will suit different scenarios.

What is a humidifier?

A humidifier is a unit that provides air with moisture. As mentioned, there are many different varieties of humidifiers in the market today, but the common goal between all of them is to increase the level of humidity in your home or room to make you feel comfortable. Humidifying the air around you has a lot of benefits.

Additionally, humidifiers can also help your household items like wallpaper and furniture last much longer.

What are the uses of a humidifier?

The primary job of a humidifier is to balance the level of moisture in your house. Moisture in the air is necessary because it prevents a lot of unpleasant problems like sinus infections, dry skin, nose bleeds, chapped lips, and many others that come from the dry air. With the help of a good humidifier, you will have a healthy atmosphere inside your home.

Additionally, dry air can also cause your furniture to develop cracks by shrinking the wood.

What is an evaporative humidifier?

This kind of cool mist humidifier has been in use for many decades now and is considered one of the most common types as well. It is a simpler of the two and is also known as the wick humidifier because of the way it works. This humidifier consists of three main components, a reservoir, a wick and a fan.

This humidifier first pulls in the air using its fan. Next, this air is passed through the wick filter that is saturated with the water absorbed from the reservoir. The air will then absorb the water and will be released into the room, giving it a healthy humidity balance. This whole process is self-regulating since the evaporation from the wick depends entirely on the overall humidity of the room.

What is an ultrasonic humidifier?

As the name goes, the ultrasonic humidifier is an advanced piece of technology that effectively spreads cool mist across your room. This humidifier is fitted with a tiny metal plate that vibrates at an ultrasonic frequency, instead of a wick and fan. The vibrations of this plate are so powerful that it breaks water particles into smaller pieces inside the water reservoir.

Once the water particles are split, they become cool vapors that are emitted out of the humidifier as an invisible and fine mist into the room. Ultimately, this mist brings in a fine balance of humidity in your room.

What are the differences between both types of cool mist humidifiers?

Ultrasonic humidifiers are the most popular types of cool mist humidifiers in the market today. Some of the main factors include that this appliance is more efficient and quieter than the evaporative model.

But, one main drawback of this type of humidifier is the production of white dust. White dust is produced because, over a period of time, the humidification process results in the build-up of minerals. In not cleaned, the mist produced will not be 100% pure and can cause health problems.

On the other hand, evaporative humidifiers do not have the above problem. But some disadvantages of the same include a high maintenance cost; the filter needs replacing on a monthly basis. Also, it is unlikely that you will find an evaporative humidifier that runs as quietly as an ultrasonic one.

Ultrasonic vs evaporative humidifier: Which one should you purchase?

Choosing the right appliance depends on several important parameters. You have to consider a lot of things while choosing like noise level, price, etc.

Below are some topics that you can consider while choosing one:


Depending on the model of the humidifier, the cost of it will obviously vary. Generally, an ultrasonic humidifier is going to be costlier than an evaporative one, due to the technological advancement in the former appliance. The more expensive ultrasonic models offer additional benefits like the option of both warm and cool mist, functionality, etc. You will likely find fewer options in an evaporative humidifier.

On the other hand, while an evaporative humidifier may cost way less than an ultrasonic one, there is a cost of upkeep and maintenance. You will have to keep on changing the wick filter every once in a while, thereby building up your cost. In the case of an ultrasonic humidifier, there is no such upkeep; all you need to do is clean it once in a while.

Health issues

Maintenance is required to keep the mist free of germs in the case of an ultrasonic humidifier. If you do not clean the appliance on a regular basis, the white dust can be emitted into your home and cause a chain of health problems. This is because the ultrasonic humidifier runs without the need for a filtration system.

On the other hand, an evaporative humidifier does not suffer from this problem. The wick filters out germs from the water and releases a clean mist. But, the filter does require changing at least once every month, which will build upon your costs. If you don’t change the filter, the mist will not be clean and lead to health complications.


Humidifiers help a lot while sleeping. It can reduce snoring, avoid noise bleeds and help you catch a good night’s sleep. With the help of an ultrasonic humidifier, you will be able to do just that. There are several ultrasonic models that run without making a single noise and not disturb your sleep.

On the contrary, evaporative humidifiers make a constant humming noise due to its fan running; although, this noise is not loud enough to keep you awake. But for very light sleepers, an evaporative humidifier might be a big concern.

Which is the best for you?

If you do not like the idea of changing the filter and want to go for something that is quiet, you should go for an ultrasonic humidifier. But, the downsides would be the regular cleaning and a high price.

On the other hand, if you are in a tight budget, you can go for an evaporative model.

But, you will need to be prepared to change the filters once in a while.

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