Difference Between an Air Purifier and a Dehumidifier

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Air Purifier vs. Dehumidifier

An air purifier purifies the air while a dehumidifier decreases the humidity level inside a room.

Both devices can comfort a cough, headache, sneeze, itchy, watery eyes, or breathing problems that are often worse due to the presence of mold. However, both operate in different ways. Let’s take a look at what sets them apart so you can determine which device is best for you.

Air Purifier

This type of appliance works by circulating air that goes through its internal filter to trap airborne irritants like dust, mold, germs, bacteria, viruses and other tiny air contaminants.

  • need an air purifierRemoves dust mites, pet dander or pollen
  • Reduces dust in your house
  • Provides allergy-relief as it traps microscopic allergens
  • Some models come with a carbon filter that can remove gaseous pollutants like chemical gas, smoke and odor particles as well
  • Other models include UV-light that is highly effective in eliminating germs and bacteria from spreading

You need an air purifier when you can’t stop sneezing, your air is stale and stuffy, you see dust mites everywhere, or your house smells of varnish or disinfectants.


A dehumidifier works by sucking out moisture from the air. That makes the atmosphere less welcoming to allergens such as mites, mildew, and mold.

  • need a dehumidifierEase breathing difficulty and alleviate a cough, headache, sinus
  • Helps to reduce odors caused by mold and mildew in your home
  • Helps to keep your personal belongings from mold, rust or corrosion
  • Less humidity means your food like bread; cereal will remain fresh for longer without getting stale
  • Improves A/C energy efficiency and lifespan as the cooling device does not need to remove excess moisture to cool the air
  • Like air purifier, dehumidifier also helps reduce the amount of dust in your house

You know when you need a dehumidifier if you are suffering from constant symptoms of allergies. Other red flags include water stains on the ceilings or walls of your home, high humidity levels, or if you notice frequent condensation on some windows.

Regardless of the device you need, Quinnair has the best HVAC equipment in the area. Call us at 303-980-3788, our experts in cooling and heating systems can help you determine which device is best for your home needs.

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