Different Types of Air Filters in Air Purifier


The air purification industry has noticed a massive change over the last ten years. Manufacturers have created air purifier with the all new technology that comes with improved indoor air quality. The all new air purifiers come different types of air filters with reduced cost of installation and operations too. It is no surprise to see air purifiers coming in different shapes, sizes, colors and operating functionalities. This is a result of the different types of air filters beneath them. In fact, dissimilar air purifiers employ different technologies for the cleansing of the air you breathe.

It is important to be aware and understand how these technologies work, so you can be certain to choose the best air purifier for your personal needs. Let’s understand the most five common types of air purifiers available in the market.

  1. HEPA Technology
  2. Activated Carbon Technology
  3. Ultraviolet Light Air Purifier
  4. Ionic Filter
  5. Ozone

HEPA Technology in Air Purifier

hepa filter air purifier

HEPA is also known as High-Efficiency Particulate Arrestor comes with a capacity to trap 99.97% of all airborne particles, which are as small as 0.3 microns in size and 95% of minute particles down to 0.1 microns. It traps and removes PM 2.5 or Particulate Matter 2.5 particles and cigarette smell to provide you with purified air. When air contaminants are exposed to a human, it’s defense system becomes more susceptible to small pollutants below 0.5 microns. Thus making HEPA air purifier the most recommended machine to remove harmful contaminants and making the air clean.

HEPA filters cannot trap and remove chemicals and fumes because their microns are even smaller than 0.3. Ultimately, it is really important to purchase a HEPA air filter that also includes an activated carbon filter with it, which will capture these allergens that the HEPA cannot.


  • Removes dust, pollen, mold spores, dust mites, and other allergens.
  • Removes most bacteria with an efficiency of 99.97%
  • Does not release the Solid particles into the air again

Activated Carbon Technology

Activated Carbon filters is another important and efficient filter of air purifier that has small spongy pores, which chemically react to pollutants as they pass through the filter. The pollutants bonds with the carbon and the carbon traps it. An air purifier with activated carbon filter is effective at clearing smoke, false smell, chemicals and even gases from the air. Activated Carbon filters are rarely used alone in a purifier to purify air, and are often used in conjunction with other filters like HEPA filter, ion filter etc.


  • Most absorbent
  • Captures chemical fumes, gases, cigarette smoke, and odor

Ultraviolet Light Air Purifier

uv filter air purifier

UV light that has electromagnetic radiation can destroy bacteria and other pathogens by breaking the molecular bonds in their DNA. Therefore, UV air filters trap and kill these particles without any filtration, but with the use of ultraviolet rays to eliminate them.

For effective results, UV should be used combined with other types of air filters. This way the combination can work together to remove a wider range of air contaminants such as odor, false smell, chemical fumes, and allergens that a UV air purifier do not remove.


  • Ability to destroy micro-organisms
  • Helps prevent illness and disease

Ionic Filter

An air ionizer is made around a negative ion generator. This ion generator sends out a stream of negative ions that attract positive dust and allergen present in the air. As a result, these particles become too heavy and as a result are unable to remain airborne that makes them fall to the floor.

As the majority of surfaces are positively charged, the particles from the ionic air are attracted to these surfaces as well. Ionizers are one of the inexpensive ways to clear smoke and foul smell. However, if you got some problems with dust and pollen, an ionizer air purifier may not be of a great help.


  • Removes ultra-fine particles as small as 0.01 microns
  • Sterilizes bacteria, viruses, smoke
  • Very quiet because of no fans or motors


Ozone air purifiers produce the ozone gas (O₃). Although many statements indicate that these devices are safe and effective in controlling indoor air pollution but health professionals have disproved these claims. Exposure to ozone may increase asthma symptoms. However, ozone does not remove particles such as dust and pollen. Most of the ozone air purifiers also include negative ion technology to work efficiently.



Now that you are aware of the different types of air filters available, your first step should be to identify the contaminants you are trying to remove. This will help you in your selection of a suitable air purifier for your home and office.

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