Different Types of Air Filters

Air purification technology which focuses on eradicating various pollutants present in the environment. There are various pollutants in the air that impact human health varying from gases, particulates, bacteria, virus, smell, smoke and other harmful suspended particles. A single filtration technology cannot eradicate all pollutants in the air. In order to ensure effective purification, multi-stage filtration technologies need to work in tandem.

HEPA / ULPA Filter

These air purifiers are the less-effective cousin of True HEPA air purifiers. If pollen and dust mites aren’t as big of problem in your home, these more economical air purifiers might be the best for you. The replaceable filters still trap 99 percent of small airborne particles including dust, smoke, and pet dander to help keep the air in your home cleaner, but they do not get rid of smaller particles like pollen and dust mites that may cause allergies.

Pre-Filters

A pre-filter captures the largest particles before they reach the more expensive HEPA filter. Most of the particles in your air are large particles like dander and dust, not tiny ones like pollens and microbes. Even though HEPA filters have a large number of pleats to maximize their surface area, they can fill up quickly if larger particles are not pre-filtered out.

Activated Carbon Filter

Carbon can be treated with oxygen, which opens the carbon’s pores making it highly absorbent. After this treatment, carbon is said be activated because it can readily be used to absorb particles and trap odors. Carbon air filters use activated carbon to trap chemicals and gases, and can also filter cigarette smoke. As the air passes through the filter, the activated carbon absorbs the odors and gasses and neutralizes them.

Ultraviolet

The Ultraviolet filters are a new technology used to remove substantial number of microbes from the air. The filter kills the bacterial pollutants in the air with ultraviolet light that incinerates the bacteria passing through it. This filter focuses on helping people who suffer from asthma, lung diseases and allergies.

Ionic Air

Also called air ionizers, ionic air filters rely on voltage to charge air molecules. Typically, they produce negatively charged ions, also called anions, which then attract particles in the air, in much the same way as static electricity. As the particles make contact with the anions, they are deionized and removed from the air stream. Ionic air filters are commonly used in commercial air filtration.

Fiber Filter

Fiber filter provides additional support to HEPA filter in order to obtain maximum purification efficiency. They help in removal of VOC gases and odor.

Photo Catalyst Filter

The photocatalyst adsorbs organic compounds in the air through the catalyst in the air purifier. After the adsorption concentration is full, it must be irradiated by ultraviolet rays (UVC: wavelength 200-275 nm) or dried in the sun for a certain time, so that the adsorbate becomes After water and carbon dioxide, the photocatalyst can restore the adsorption function.

Cold Catalyst

Cold catalyst is a low-temperature and low-adsorption catalyst. It catalyzes the decomposition of organic compounds in the air with oxygen to produce water and other substances that are harmless to the human body, thereby achieving the elimination of harmful bacteria and carcinogenicity at normal temperature.

Ozone Generators

Ozone generators are air purifiers that intentionally produce ozone. Not all are effective, but some are not even appropriate for home use, like ozone generators. Ozone generators are not effective air purifiers for your home; they can be harmful to your family and can cause health problems, including respiratory tract irritation and breathing difficulty.