An air purifier is a machine that removes pollutants and allergens like dust and pet dander from indoor air. While there are a variety of types of air purifiers, the most popular ones are those which clear the air via electrostatically charged metal plates. Air purifiers remove microbes (including germs, bacteria, mold spores and viruses), odors (like cigarette smoke and pet odors), certain chemical fumes and particulates (such as allergens and dust mites) from the air in your home.

On the Other: Significant Limitations

While air purifiers definitely discharge cleaner air than they take in, they're not a solitary solution. That's because some allergens are too heavy to float in the air, so they remain on the surfaces in your home. And, according to the United States Environmental Protection Agency, ozone producing purifiers may cause more harm than good. Plus, says the EPA, "If used at concentrations that do not exceed public health standards, ozone applied to indoor air does not effectively remove viruses, bacteria, mold, or other biological pollutants."

Bottom Line

There are a number of types of air purifiers available, though some are more effective than others. Since some air purifiers produce ozone gases that can be risky for your health, look for one with electrostatic plates. A HEPA filtration system will offer you the best allergy protection.

Source:

Allergy Escape: The Truth About Air Purifiers

US EPA: Ozone Generators Sold as Air Cleaners

Resource:

Consumer Search: Best Air Purifiers