Difference Between Air Purifier and Diffuser

There are many gases present in the atmosphere but oxygen is the most abundant component which we use to survive. Due to toxic chemicals and pollution, the air gets polluted which causes respiratory diseases.

For purifying the air, air purifiers are in trendy use. And diffusers are used to fragrance the air with moisture. These two will be discussed below in elaborate detail.

Air Purifier vs Diffuser

The main difference between an air purifier and a diffuser is that the moisture and fragrance are absent in an air purifier but the diffuser do these jobs properly. An air purifier cleans the air which means ridding it off of bacteria and other pollutants present in the air. And diffuser helps the air to maintain the moisture makes it fresh and fills it with scent.

Air Purifier vs Diffuser

The air purifier is a device that eliminates contaminants from the air. This works best for the problems like allergies related to pollen, dust, pet dander, etc.

It is also helpful for asthma patients as it clarifies the dust from the air. Air purifiers that employ filter, sucks the air in and filter out the pollutants to sanitize the air before throwing it out to circulate in the room.

The diffuser is also called an aroma lamp and it is a device that enhances and freshens up the air by diffusing the essential oil scent and also adding moisture to the surrounding air.

When you inhale and absorb into your body, it aids relaxation and helps the senses. Essential oils are made to relax and calm your body.

And these oils can be used according to our choice. So diffuser does the best job to make your day.

Comparison Table Between Air Purifier and Diffuser

Parameters of ComparisonAir PurifierDiffuser
Another nameair cleaneraroma lamps
Functionpurifies the airdispense the essential oil and moisture in the air
Additional componentNoYes, (essential oil).
AdvantageCleans the air, the best option for allergic people.Diffuses the essential oil to relax the body.
Disadvantagemay cause throat irritation, coughing, chest pain, etc.may cause irritation and burning, asthma attacks, etc.

What is Air Purifier?

The air purifier is a device that helps to sanitize the air inside the room. They are usually of two types. Firstly, the air purifier which employs filters to suck the air in and purify the air.

Another type of air purifier is filterless; this cleans the air by emitting large negative ions which attach to dust, smoke, bacteria, viruses, etc.

This makes the particles heavy in the air and won’t allow inhaling in. It refreshes the air, reducing the chance of health issues caused by indoor pollutants, which can trigger respiratory infections.

Air purifier with HEPA (high-efficiency particulate air) filter removes 99.7% of airborne matter present in-room environment. HEPA filters can literally capture over 99.5% of all particular pollution.

They are made of plastic or fiberglass which can filter nanoparticles. These filters have to be cleaned if pollen, dust, smoke, etc. get clogged, but they lose their property once they clogged the debris.

So if this happening occurs, HEPA filters are needed to be changed which demands high expense.

These air purifiers are used in houses, offices, hospitals (mainly in operation theatre to make the air bacteria-free), etc. Some disadvantages of air purifiers are chest infection, irritation, cough, etc.

What is Diffuser?

The diffuser is a device that moistures and diffuses essential oil all over the air inside the room. It helps to relax our bodies and make us feel fresh. These do not clean the air as the air purifier does.

People using these days find it very beneficial as they use it after getting tired or fatigued. As the name says it all, it diffuses the oil in the air without taking it in.

It is a bit expensive though and not that affordable for everyone.

This electric device has a plate that vibrates and causes ultrasonic waves to make microscopic particles of essential oil to disperse it in the air.

The essential oil can be any type, like grapefruit, citrus lemon, peppermint, etc.

The diffuser is used in rooms, hotel rooms, even in the car to avoid strange smells. However, the diffuser has their disadvantage too.

They can cause irritation, chest pain, asthma attacks, etc. People having asthma should avoid the use of diffusers as the essential oil particles might cause problems to their lungs.

Otherwise, the product is worth buying under some conditions mentioned above.

They are in different sizes according to the referred place like for cars, the smaller size is preferred and for rooms, there are choices for it.

Main Differences Between Air Purifier and Diffuser

  1. The air purifier cleans up the surrounding air in the room whereas the diffuser dispenses the essential oil particles in the air to spread the scent and moisture.
  2. The air purifier is much expensive than the diffuser due to its functions.
  3. Air purifier does not add moisture whereas diffuser does because of essential oil used in them.
  4. Air purifier helps asthma people by making them dust-free whereas diffuser is harmful to them because the particles of oil get stuck in their lung and cause irritation.
  5. The air purifier sucks the air in to purify it while the diffuser diffuses the oil particles in the air without taking it in.
Difference Between Air Purifier and Diffuser


The technology has gone so far that the air can be purified and can add the scent according to our choices for relaxing our body and mind.

However, there is the bitter truth about these products that they are harmful to our health, especially the asthma people.

An air purifier is doing its best by cleaning up the air but can cause chest infection and diffuser helps in relaxation but poison for the people having asthma.

Last but not the least, the use of these products makes life helpful and easy but the demerits should be in mind while using these.


  1. https://www.journals.uchicago.edu/doi/abs/10.1086/705554
  2. https://www.sciencedirect.com/science/article/pii/S0360132314002716
  3. https://www.jstor.org/stable/25034269
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