The Difference Between Air Purifier and Humidifier

Although many people use both these terms interchangeably, the reality is different. In this article, we are going to find the difference between humidifiers and air purifiers. Although you can get both of these units, a combination of these units is also available in the market. Without further ado, let’s find the difference between the two units.

Air Purifier

An air purifier is designed to filter a large variety of pollutants. These devices can trap and remove smoke odors, pet dander, mold spores, allergens, and bacteria. When the unit is running, polluted air can remove airborne particles from it.

If you go for a HEPA version of these filters, you may expect to filter 99.97% particles from the air. All of these contaminants can cause a lot of health issue issues, such as respiratory conditions, asthma, and allergies.

Typically, HEPA filters are made of fiberglass and plastic threads. They are tightly woven and cannot allow pollutants to pass through. It is essential to keep in mind that these units don’t add or remove moisture from the air. The only role of these units is to filter out air pollution.

In other words, these units don’t serve the role of air humidifiers. Therefore, you may want to keep this difference in mind before processing this unit.


The primary function of a humidifier is to add moisture to your indoor air. Basically, this device generates water vapor and releases these vapors into the air. As a matter of fact, this is the primary difference between the two units. The role of a dehumidifier is to remove excess moisture from your room. So, this type of unit has reverse functionality.

If you want a humidifier to keep adding moisture to your indoor air, we suggest that you continue to add water into the reservoir unit. The function of this unit is to generate fine mist and spread it across your room.

We suggest that you place a humidifier in a room that has a lack of humidity. Lack of humidity in your room may cause you to experience breathing problems, nosebleeds, sinus issues, throat irritation, android skin, just to name a few.

It is essential to keep in mind that a humidifier can help increase the relative humidity level in a room. However, it is essential to keep in mind that an excessive humidity level may cause mold growth. Ideally, the relative humidity level in your room should be between 30% and 50%.

If the relative humidity is below 30%, you may experience all of the issues mentioned above. On the other hand, if the humidity level is more than 50%, you may have to deal with the problem of mold and mildew.

For some reason, if you cannot reduce the humidity level in your room, we suggest that you go for a good air purifier. With these units running, you can filter mold spores.

Long story short, this was a description of some major differences between air purifiers and humidifiers. Hopefully, these tips will help you opt for the best unit to cover your needs.