Dust is a natural part of the air, which greatly contributes to the dustiness of our homes. This increases in more dusty areas of the country. Additionally, we bring in dust that can get into the air and settle in the house. Keeping windows and doors open can exacerbate the problem, however, even without open windows and doors, you’re going to naturally get dust in your home from the dust in the air. Air purifiers can help by pulling that dust out of the air.