Dehumidifier vs. Air Purifier

Dehumidifier vs. Air Purifier

Before making a purchasing decision, many people ask the question, “are air purifiers and dehumidifiers the same?”

Definitely not. As their names suggest, a dehumidifier pulls moisture from the air while an air purifier cleans the air. Both can mitigate the health effects of allergens and contaminants but do so in very different ways. Below, we’ll compare the two and offer some tips on selecting the right choice for your indoor air quality needs.

Differences Between How Air Purifiers and Dehumidifiers Work

What Is a Humidifier?

A dehumidifier works by pulling excessive moisture from the air, reducing the room’s humidity level, and preventing toxic molds and mildew from forming. 

With less water, mold spores, mildew, and harmful microbes that rely on the humid environment will start to die off, leaving the room safer for those with allergies or asthma. The three popular humidifiers you’ll find on the market are:

  • Refrigerant
  • Desiccant
  • Electronic

Choosing the right humidifier depends on your particular needs. You’ll want to ensure the one you purchase has the capacity to handle the humidity level of your room. The more humid your room, the higher the cost of the dehumidifier.


What Is an Air Purifier?

Air purifiers, unlike dehumidifiers, provide clean air by removing, trapping, or destroying, pollutants, dust mites, pet dander, and other toxic airborne particles already circulating. 

Portable commercial-grade filtration systems, such as the CleanAir Tower, can reduce over 90% of airborne particles floating through your room. There are several types of air filtration technologies available on the market.


Types of air purifiers include:

  • HEPA filtration
  • Bi-polar ionization
  • Ultraviolet (UV) lights
  • Activated carbon filter


However, most air purifiers only use one or two technologies (unlike CleanAir Tower, which can simultaneously use three air purification technologies to trap particles as small as 0.3 microns).

There’s no question that both systems can complete their assigned tasks, but what is the difference between dehumidifiers and air purifiers?


Is a Humidifier the Same as a Dehumidifier? 

Find out how a humidifier affects IAQ and whether you need one for your office.

Read More

Dehumidifier vs. Air Purifier: Pros and Cons

These days we’re all conscious about the safety of our environment, and that includes the air we breathe. Improving air quality, removing allergens, and preventing the growth of molds ensures the safety of employees, clients, and family members.

To make an informed decision, you’ll need to understand exactly what each system does, how it works, the limitations, and which system is better for you. Let’s make a quick comparison to help you choose between an air purifier or a dehumidifier.



As stated, a dehumidifier’s primary function is to pull the moisture from the air. With a humidity level of less than 50%, it will be difficult for molds, mildew, and microbes to grow.

There are distinct advantages and disadvantages to choosing a dehumidifier over an air purifier.


  • Prevents mold, mildew, and noxious odors from forming
  • Temperature control similar to an air conditioner
  • Reduces humidity levels
  • Food preservation


  • Does not purify the air
  • Not effective against viruses, VOCs, and harmful particles
  • Can cause air circulation issues

Air Purifier

are air purifiers and dehumidifiers the same

To clean the air of dangerous pollutants, bacteria, and even viruses, you’ll want to invest in a commercial-grade portable air purification system. An air purifier circulates stagnant, polluted air through a small motor, trapping particles in a filter before releasing fresh, breathable air. However, like a dehumidifier, there are pros and cons.


  • Several varieties available
  • Purifies the air against dust, pet dander, bacteria, VOCs, and viruses
  • Filters out smoke and musty smells


  • May require frequent filter cleaning (depending on IAQ)
  • May be less effective against mold
  • Best used in rooms with 50% humidity or less

Are Air Purifiers and Dehumidifiers the Same?

air purifier or a dehumidifier

After the comparison, we can safely say there is a big difference between an air purifier and a dehumidifier. Air purifiers and dehumidifiers are entirely different systems performing two completely different tasks.

While both can help alleviate symptoms of allergies, they don’t tackle the same allergy. A person with a mold allergy will be okay with having a dehumidifier to stop mold at its source. Someone with allergies to pollen, pets, smoke, but not mold would require an air purifier.

This distinction is crucial when deciding on a  dehumidifier or air purifier for your office, school, lab, or home.

If you have a mold or humidity issue in the office, choosing the CleanAir Tower to work in tandem with a dehumidifier is your best option. If there is no humidity problem and your room is less than 50% humid, the CleanAir Tower will be your best option to tackle harmful airborne toxins.


Learn More About the Different Air Purification Technologies:

  1. Air Scrubber vs. Air Purifier – What’s The Difference
  2. Difference Between Air Cleaners And Air Purifiers
  3. Air Ionizers vs. Air Purifiers – Which One You Should Buy


An Air Purifier Is Not the Same as a Dehumidifier

Weighing the pros and cons of each system, when it comes to protecting the health of occupants, an air purifier is better at:

  • Relieving asthma and allergy symptoms
  • Eliminating unpleasant odors
  • Reducing the risk of airborne diseases from bacterial or viruses (including COVID-19)
  • Cleaning the air of hazardous VOCs

Air Purifier vs. Dehumidifier: There’s No Contest When it Comes to IAQ

Improve the air quality of your business, school, lab, or home by investing in a CleanAir Tower to ensure your air is always fresh and clean. For more information about your air quality control options, contact us at AirFixture today!