Air purifiers feature different types of filtration technology; hence, they all function differently. There are five main types of filters – HEPA, activated carbon, UV, ozone, and negative ion.
While HEPA technology filters invisible particles such as airborne virus particles through a fine fabric mesh, activated carbon filters are ideal for pollutants such as smoke, odors, and gases.
UV technology is highly efficient in killing germs and bacteria; however, it does not remove airborne particles; therefore, UV filters are used in combination with other filter systems.
Air purifiers with negative ion function magnetically attract airborne particles from the air, but these are known to be less effective.
Lastly, ozone filters produce ozone gas; however, health experts do not recommend it.