The first thing to consider when you look for the best air purifier is a machine's Clean Air Delivery Rate (CADR), which gives you an idea of how effective it is at cleaning the air in a room. The CADR score was established by the Association of Home Appliance Manufacturers (AHAM) to indicate how much filtered air a purifier delivers to the room it's in. Essentially, each air purifier we reviewed has three separate CADR scores: one for smoke, one for dust and one for pollen. The higher the CADR scores, the better the machine is at removing airborne pollutants in your home. Note that not every air purifier on the market has CADR scores, making it difficult to compare them against others. To learn more about machines without CADR scores, check out our .
While you search for the best air purifier for you, make sure you find one that uses HEPA filters, which remove 99.97 percent of 0.3-micrometer particles. HEPA filters are the industry standard, as they can remove particulates that other types of filters can't match. Many purifiers also include a pre-filter, usually made of carbon, which captures larger particles so you don't have to replace HEPA filters as often and helps eliminate odors. Some air purifiers include other filters to help remove particulates such as pet dander and germs.
One of the objectives for our site is to provide you with the information necessary to make an educated decision to select the best air purifier for your situation. There are different air purification technologies, filters and price points. Unless you put a lot of time into researching purifiers it can be daunting. We hope that you find our air purifier rating and ranking system easy to understand and valuable such that you can be confident with your decision.