Air purifiers are designed for different applications. Residential air purifiers are designed for small residential rooms while large commercial and industrial models can handle very dirty air. These devices are available in various sizes and come with a variety of features. While all purifiers can trap dust, some models can do it better and more efficiently. Buy an air purifier for dust trapping if dust is a big problem in your area.
Look for a purifier designed to trap maximum amount of dirt from the air. This device will keep your air clear of even small dust particles. It will have HEPA complying filter that can remove even small particles of dust. Some devices have a charcoal filter to reduce odor and smells.
First determine the size of the area that requires air purification. Choose a device based on this specification. The purifier should be able to clean air of the whole room even when it is installed in one corner. Latest devices in this range are capable of trapping almost 99% of dust. They can trap dust particles up to 0.3 microns in size.