Air Purifiers contain various filters that almost negate the indoor pollutants and return the air quality to safer levels. While there are many air purification filters that are used in air purifiers, there are only some that are very relevant to air purification at home. While it’s good to have several filters, the filters that are must are Pre Filter , Activated Carbon Filter, HEPA filter.
A HEPA filter and Activated Carbon filter does the job of completely removing smoke and harmful gases from the air and reduce indoor air pollution.
Pre-filter: There are lot of contaminants like particles of dust, pet dander and other allergens. They are captured by Pre-Filter. This helps in increasing the longevity of HEPA filters. Pre-filter removes the bigger particles and protects the HEPA filter from clogging. The main function of pre-filter is to reduce expenses that can result from clogging of HEPA filter.
Activated Carbon Filter: The treatment of carbon with oxygen opens up multiple tiny pores on the surface of the carbon. The pores are so much in number that one pound of activated carbon provides 60-150 acres of surface area. It works on the concept of adsorption. The gas elements bond with the surface of solid. Activated carbon is the solid material that adsorbs air pollutants that are 60% of its weight. Once they are adsorbed by filters, the purified air leaves from the other side.
HEPA: HEPA stands for High Efficiency Particulate Air. They are used in combination with activated carbon filter and impart high efficiency of air filter. It removes wide range of airborne pollutants and also removes dust mites, pollen, mold and pet dander which are responsible for triggering problems like asthma. HEPA filter removes 99.9% of airborne contaminants which are of the size 0.01 microns. It is the most efficient for people suffering from allergies and asthma.