difference between air purifier and humidifier

Difference Between Air Purifier And Humidifier ( A Detailed Guide 2024 )

Air purifiers and humidifiers impact the indoor air you breathe, but their purpose, functioning, health impacts, use, and everything are different. Air purifiers decontaminate the indoor air, while humidifiers increase the moisture content in the air. It is important to know the difference between air purifier and humidifier to pick the one you need; therefore, I opened a quick and useful discussion on the working, use, and impact of both shortly.

Difference Between Air Purifier And Humidifier

Can You Use an Air Purifier and Humidifier Together

Air Purifier

An air purifier is a portable device used to clean indoor air. It filters the air and removes the contaminants like smoke, dust, debris, pet dander, mold spores, and more—this way, an air purifier saves you and your loved ones from respiratory disorders and air-borne diseases. Also see Can Air Purifier Make You Sick

How Does It work?

An air purifier has different components, including a fan, a motor, a fine filter, and a body. The fan aims to get the air in and let it pass through the filter, and once it gets cleaned, return the air to the environment. The ultra-fine filters attached to the air purifier clean the air by removing unwanted particulates like dust, dirt, smoke, debris, and pollutants. An air cleaner is an electric appliance that is powered by a motor.

Air cleaners have been updated over the years, and modern air purifiers offer improved purification management, energy efficiency, portability, etc. I love the smart sensor-based air purifiers that boast user-friendliness, customized settings, powerful air cleaning, and more. You can change the fan speed and other settings based on the air volume and the concentration of pollutants within it.

How Long Should An Air Purifier Run?

Well, that depends on many relatable factors, like the efficiency of an air purifier, contaminants present in the air, and more. But the best part is that the air purifiers are programmed to function continuously. You can even run an air purifier 24/7 without any issues. Don’t sweat your electricity bills because the air purifiers are integrated with power-saving motors.

How Does Air Purifier Impact Your Health?

The air purifier removes pollutants like pollen, dust, ragweed, mold spores, particulate matter, pet dander, and debris. It works to clean the air and improves its quality to offer all living beings better air. This way, the air purifiers protect people, pets, and indoor plants from many health issues like respiratory diseases, i.e., asthma, bronchitis, and other air-borne diseases.


  • Cleans air
  • Prevent respiratory issues
  • Energy-saving


  • Continuous running is suggested

Air Humidifier

An air humidifier is a device that adds water vapors or moisture to the environment to reduce dryness. Purposely, the air humidifier removes dryness that can cause itchiness and irritation to the human body and make the air better for all living beings. It treats dry and rough skin, hair, and lips effectively.

Not only that, studies have found that an air humidifier also treats diseases like colds and flu. It effectively reduces dryness in the throat, nose, skin, and other areas. Overall, humidifiers potentially increase the moisture level or humidity of an indoor environment, which means they are not engineered to clean the air.

Humidity is a natural moisturizer that reduces dryness; this is the baseline phenomenon on which the air humidifier works. It best suits cold areas and relieves dry throat, dry skin, nose irritation, sinus congestion, bloody noses, headache, dry cough, dry lips, and irritated vocal cords. The air humidifier is best for winter when the indoor and outdoor air is dry.

How Does It work?

An air humidifier is a portable device that boosts the natural evaporation mechanism. Doesn’t it sound interesting? The air humidifier is integrated with a fan that gets the air in, passes it through a damp filter, and then returns it. The damp filter converts water to vapor form through evaporation. The air humidifier then blows the water vapors to the room or any closed space to elevate the moisture or humidity level.

Like the air cleaner, the air humidifier is also engineered to work cyclically and continuously. It gets the air in, converts the water content to vapors, and returns it to the room. Different kinds of air humidifiers; are conventional, while others are advanced. You should never compromise on the quality in the first place, and if you have a good budget, please opt for a modern air humidifier that offers customized features.

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In addition, air humidifiers are divided into two broad categories: category one includes air humidifiers that proceed evaporation by heating. In contrast, category two includes air humidifiers that elevate the moisture level of your room via cooling. These different classes are based on the mechanism (i.e., heating and cooling), while the primary purpose of both is the same.

How Long Should An Air Humidifier Run?

Unlike air purifiers, air humidifiers are not meant to run 24/7. You should run an air humidifier for 15 to 20 minutes depending on the air’s dryness and your body parts. As I said earlier, the answer to this question depends on the quality and performance of the air humidifier, too, because not all humidifiers are the same. That’s why the best idea is to get one that is efficient in performance to save energy costs.

How Does Air Humidifier Impact Your Health?

Air humidifiers increase the moisture content in the atmosphere to reduce dryness. These portable appliances help relieve dry throat, dry skin, nose irritation, sinus congestion, bloody noses, headache, dry cough, dry lips, and irritated vocal cords.


  • Prevents dryness
  • Works quickly
  • Portable device


  • Does not clean air

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The air purifier has nothing to do with the moisture content of the air, but it is just a cleaner that filters the indoor air and converts it to the cleaner version by removing the contaminants. However, prolonged use of an air purifier might cause air to feel drier than before.

Yes, you can sleep with an air purifier as it will not cause any harm. But that doesn’t mean it is necessary to sleep with an air purifier; you should operate the machine based on your need. To determine how long you should run an air purifier, please determine the contamination and air volume.

The air humidifier is a must-have product if you live in a dry environment or even in winter when there is naturally low humidity. The humidifier increases the moisture level and reduces dryness on your body parts, and gives you relief from irritation.

Air purifiers clean the air by filtering out the contaminants like pollen, mold spores, particulate matter, pet dander, dust, debris, and smoke. Air purifiers provide clean air by filtration and save us from multiple air-borne diseases. In contrast, the humidifier has nothing to do with air quality; it adds moisture to the air and reduces dryness. Both of these appliances have their merits and demerits; however, as an asthmatic, I like the air purifier more.

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