The purifiers which use ozone technology use high voltage electrical currents to convert oxygen to ozone. This acts as a powerful oxidant and breaks down molecules and microorganisms in the air. These air purifiers are not very effective indoors.
There are also negative ion generators or ionic air purifiers whose wires or needles create gas molecules with negative charges which stick on to the airborne particles and collect them in filters. These purifiers do not remove all particles, gases, chemicals and odors. They recirculate the drawn particles and are not considered to be very effective.
Activated carbon filters have pores that trap pollutants when they pass through the filter. These purifiers can clear various odors, smoke, chemicals and some gases too.
We have to select the right type of air purifiers depending upon the pollutant that we are trying to remove. There are air purifiers available which combine two or more of the different technologies to provide a more effective air purification system. The association of Home Appliance Manufacturers (AHAM) rates air purifiers for its ability to remove smoke, pollen and dust. Each of these pollutants have maximum prescribed values for its ability to remove a particular pollutant. So, if the number is higher the ability of the air purifier to clean the air of that pollutant is also more.
We should also take care to keep the inside of our house free from the pollutants which irritate us. Maintaining proper hygiene, regular cleaning and taking care of molds and pet dander will help reduce the house pollutants to a large extend. Read on to know about the leading air purifiers and their features to select the one that best suits your need.