The best midrange air purifiers are those that can effectively remove all types of pollutants, including smoke, pollen, and chemical sensitivities. These purifiers can be found at a variety of prices, but they all have some features that make them worth your investment. One of the most important features of a midrange air purifier is the filter. A good filter will remove all types of pollutants, including smoke, pollen, and chemical sensitivities. Additionally, the filter should be replaced every 6 months or so, depending on the use and abuse of the air purifier. Another important feature of a midrange air purifier is the noise level. A good air purifier will be quiet, making it easy to use. Additionally, the air purifier should have a long life, as it will need to be replaced only once every 6 months or so. Finally, a midrange air purifier should have a variety of features, including a filter, noise level, and life. Some of these features may be important to you, while others may not be. However, all of these features should be considered when choosing an air purifier.