There are 5 types of Air Purifiers available in India
- HEPA flters: HEPA filters can retrieve almost any harmful particle found in the air. Though HEPA filters have high efficiency, they are known to consume higher energy. Read about HEPA filters here
- Carbon purifiers: Activated carbon is specifically manufactured at high heat to become extremely porous and to give it a large surface area to ensure maximum absorption of volatile chemicals on molecular basis. The molecular-sized pores on activated carbon filters have high absorbency and chemical bonding. These two properties make them highly effective in capturing pollutants that are able to pass through HEPA filters like chemical emissions, gases, tobacco smoke, and other odors.
- Ionic air purifiers: An air ionizer is a type of air purifier that cleans the air with the use of negative or positive ions. It releases a very high concentration of these ions which attach themselves to air pollutants that are usually neutral so that they either have a negative or positive charge. Once charged, they become attracted to surfaces or other pollutants with the opposite charge. As they stick to each other, they become too heavy to remain airborne and settle on the floor or the walls to be cleaned or vacuumed later. Ionizers are very effective at removing common household air pollutants but often have trouble removing smoke, volatile organic compounds, and other odors. Another drawback is that ionizers tend to produce a small amount of ozone while they’re running. Ozone has been known to cause chest pain, coughing, and throat irritation even at low levels.
- Ozone purifiers: An Ozone purifier oxidises the chemical matter present in the air. They primarily take in the oxygen that is present in the giving it a strong electrical charge. This charge then allows the oxygen molecules to rearrange themselves to form ozone. Though this is believed to be a fast way of air purification, it is known to be harmful as ozone, by itself, is considered harmful.
- UV purifiers: Like room air purifiers, whole house air purifiers also make use of UV light to take care of biological pollutants such as bacteria, viruses, mold, fungi, and dust mites. Ultraviolet air cleaners are often installed as add-ons to an electrostatic system. They do not help purify smoke or allergens.