Air Purifier Vs Dehumidifier: How Each Works And Comparison

air purifier vs dehumidifier

For some years now there has been a debate over the air purifier and dehumidifier. Most people find themselves in a fix or quagmire when deciding on which device to purchase. These two devices serve almost similar functions, which give a lot of property owners a hard time making up the right decision.

The benefits of owning either air purifier or dehumidifier are enormous, especially for the people who are affected by allergies and respiratory conditions like asthma. The main aim of having them is to clean the air and get rid of all foreign impurities that may pose a significant danger to the occupants.

Even though these important devices share some common functions and feature there merges a distinction between the two in terms of their make, technology used and other functions. In this article, we aim at comparing and contrasting the air purifier and dehumidifier to help you make the ideal choice to solve your specific needs and problems.

Air Purifier vs Dehumidifier

To help you get a grip of their functions it is right to get a simple explanation of what these devices do. A dehumidifier is a device used in the indoor space that helps get rid of moisture, which is the main indicator of the humidity levels. The moisture creates and provides a comfortable environment for mold to thrive, which releases spores that are allergens. Having a dehumidifier around helps to mitigate this moisture issue, which in turn helps to keep mold and microbes at bay.

On the other hand, the air purifier is also a device that can occupy any room or indoor space to get rid of most impurities in the indoor air such as smoke, mold spores, dust particles, and debris. All the airborne allergens are extracted by the help of a filter, which is the main component of an air purifier. The filter helps trap most of the impurities depending on the technology applied.

How do they compare?


In terms of the application, the air purifier performs its duty by extracting airborne impurities with the help of a filter while a dehumidifier sucks all the moisture to relieve any humidity levels in a room, which destroys the ideal environment for mold growth.


The air purifier provides relief for most people who suffer from allergens and asthma while a dehumidifier inhibits the growth of mold, which is dangerous for any occupant.


A dehumidifier is structured to get rid of moisture and clean the air from any mold spores and dust mites while an air purifier helps to extract pet dander, mold spores, allergens, bacteria, and dust particles.

Let us look at the circumstances that would be ideal for the use of either an air purifier or dehumidifier.

An air purifier should be ideal if:

  • You need to get rid of most allergens and pet dander suspended in the air.
  • For the occupants who are prone to asthmatic attacks or other respiratory conditions, then it would be in your best interest to get an air purifier.
  • There are also indoor spaces that are dusty, which is an unhealthy condition to live in.
  • Other situations that would provoke people to get an air purifier include mold presence, smoke, and additional family members like the pets.

A dehumidifier should be ideal if:

  • You wish to get a musty, stuffy, and dump room safe for living.
  • You need to control the spread of dust mites, which are responsible for causing allergies to family members additionally causing fever, difficulty in breathing and wheezing.
  • A certain level of humidity affects you.
  • You are in high humid places and need to regulate the indoor temperature without the help of an air conditioner.

To settle the confusion, below are well-explained scenarios that would force you to choose a device over the other:

What to use for your basement?

Individuals who seek to get rid of the moisture, which might build in your basement, then it would be ideal to use a dehumidifier over an air purifier.

Asthma attacks

Working with an air purifier here is the ideal solution since it helps kick out any allergens contaminating the indoor air. You need clean and well-purified indoor air to stay away from asthma and other respiratory conditions.


Fighting any allergic reaction is vital, and both devices could work perfectly in this situation. An air purifier is known to eradicate the presence of any form of allergen, spores, pet dander, dust particles, and debris while a dehumidifier is suitable for the extraction of mold and dust mites.

Mold growth

Mold is known to release spores that are responsible for causing allergic reactions, and a dehumidifier works better when compared to an air purifier. An air purifier partially solves the mold issue by getting rid of the spores suspended into the indoor air.

Getting rid of dust mites

The dust mites that are known to cause allergic reactions could be confronted with the use of either a dehumidifier or air purifier. A dehumidifier gets the work done by getting rid of the moisture, which is a condition dust mites love. An air purifier works by extracting dust that is something these mites feed and seek refuge in.


Finally, it wouldn’t hurt if you had both devices fitted in your property for enhanced performance. Since they perform different functions geared towards a similar goal, it would be wonderful having a combination of the two.

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