If you want to buy an air purifier, then you have to do some research, because we know that the needs of each allergy, asthma, and MCS sufferer are somewhat different. Selecting the best air purifier means that you are buying one that offers many advantages to the particular needs of your family. This means that you just don't consider the price but also its suitability, right? So you must be carefully to select the one in the market that can work for your family. There are five main types of air purifiers, including HEPA, ozone, carbon, ionic and ultraviolet light, air purifiers are primarily categorized by filter type. Some air purifiers combine more than one type of filter for greater efficiency.