Air Purifiers vs Dehumidifiers – Everything You Need to Know

When faced with the responsibility of choosing an air purifier or dehumidifier, it is best you do some research to better understand air purifiers and dehumidifiers.

Carrying out research in this way will ensure you find the best results for yourself when it comes to comparing the functions of an air purifier vs dehumidifier. These two devices have certain similarities in cleaning the air, and both contain mechanisms by which they produce clean air and their main purposes will guide you in determining which is best for you and your family. Fortunately, we will do all of this analysis here to better inform your decisionmaking.

Air purifiers and dehumidifiers are similar in that they both help allergy sufferers by removing allergens from the air to improve air quality and provide them with the cleanest air possible within a given space or room. Their differences lie in their respective processes for improving indoor air quality.

Key differences between Air purifiers and Dehumidifiers in this article will focus on the following:

  • Mechanism / How both appliances work
  • Humidity levels
  • Types
  • What they are useful for
  • Noise levels


Air purifiers are made to remove irritants and airborne contaminants in general from the air by passing air through air filters

The dehumidifier works by removing excess moisture from the air, creating low humidity levels where high humidity levels prevail by passing air through gels (desiccants) or condensing it to remove moisture.

Humidity levels

Air purifiers have nothing to do with humidity levels or low humidity levels

Dehumidifiers remove take care of excess humidity by removing excess moisture from humid environments (environments with high humidity levels).


Types of Air Purifier include HEPA Filter, generators, Adsorbents, Ionizing, Ozone, UV light

Types of Dehumidifiers include Mechanical or refrigerative, Adsorption/desiccant, Air conditioners, Makeshift, Ionic membrane, Electronic

Useful for

Air Purifiers are useful for Asthmatic patients, allergy sufferers, removing dust particles, smoke particles, mold spores, pet dander, and other allergens or irritants.

Dehumidifiers are useful for removing dust mites, mold spores, mildew, musty smell, dampness by reducing moisture levels, converting highly humid environments to environments with low humidity levels.

Noise levels

Air purifier noise levels range from soft to loud.

Dehumidifiers noise levels are between average and loud

What are Air Purifiers for and what are the common types?

Air purifiers will be useful if you have problems breathing and need the cleanest air you can get. They are also useful if you have allergies that require you to reduce spores, pet dander, and other allergens from your home. They are for removing contaminants and irritants from the air.

We will now discuss the types of Air purifiers to help you make a choice in finding the best air purifier.

Common types of Air Purifiers include: 

  • Filter (HEPA air purifiers) –  These are types of air purifiers that use a HEPA filter (High-Efficiency particulate air filter) or which utilize ULPA (Ultra-Low Penetration Air) filter to distribute air, removing dust particles and other irritants.
  • Ozone generators – These are Air purifiers that convert oxygen (O2) into ozone (O3).
  • Ionizing – purifiers utilize a small powerful electrical field that creates oppositely charged particles, making them come together, separating them from the air.
  • UV Air Purifiers –  This type of Air purifier uses Ultraviolet light to sterilize air, killing germs and bacteria that may be present. However, this type of air purifier does not remove dust and other particulate irritants. For this reason, it is best to combine this kind of air purifier with other types of purifiers to ensure complete purification so you can get the cleanest air.

What are Dehumidifiers for and what are the common types?

Dehumidifiers serve to get rid of musty smells in indoor air. They also serve to remove dust mites and reduce the risk of worsening respiratory problems. They maintain low humidity in indoor air. They do these by removing excessive moisture that may be present in indoor air. We will now discuss types of dehumidifiers to help you choose the best air humidifier suitable for you.

Common types of dehumidifier include:

  • Mechanical or refrigerative dehumidifier – This is perhaps the most common type available. It sucks in moist air over a refrigerated coil which has a small fan attached to it. The air is then condensed, collected, and distributed. This type of dehumidifier is commonly used where the relative humidity is usually 45% and above.
  • Air conditioners –  by virtue of the way they work, air conditioners act as dehumidifiers.
  • The electronic dehumidifier – This type of dehumidifier creates a cool surface to condense water vapor from the air using a heat pump. Electronic dehumidifiers are relatively quieter than other humidifiers because its parts or components do not make move. This type of humidifier is usually small in size.
  • Adsorption/desiccant style dehumidifier –  this type of dehumidifier utilizes humidity-absorbing materials that are made to move along belts. The humidity absorbing materials are usually gels.
  • Makeshift dehumidifier – This type of dehumidifier works in a similar manner to the mechanical humidifier. They send their heat exhaust back into the air space.
  • Ionic membrane – This type of dehumidifier utilizes a specially designed ionic membrane as an ionic pump to distribute humidity at a molecular level. This is usually used in industrial areas.


In the first place, both Air Purifiers and Dehumidifiers are wonderful appliances. The Air purifier is a better air purifier, removing germs, bacteria, and irritants from the air but failing to do anything about humidity. This means that even though it removes spores, the excessive moisture content (if you live in an environment with high humidity levels) will ensure that a build-up of mold will occur.

Dehumidifiers, on the other hand, reduce the temperature and the humidity in the air space, ensuring that molds will not form. However, it does not remove irritants as Air purifiers do.

As a result, if your concern is the high amount of pollutants increasingly present in the air these days, the Air purifier is your best bet.

Chad Hill

Hey, I'm Chad. I started Skyonic because I genuinely believe air quality is one of the most important contributors to the overall quality of our health. When I'm not blogging about air purifiers, you can catch me traveling and exploring some of...

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