Air purifiers are devices that help improve indoor air quality by removing pollutants and particles from the air. They work by drawing air into the unit through a filter or multiple filters, which capture and remove pollutants and particles from the air. The newly cleaned air is then circulated back into the room. Some air purifiers use multiple filters, including High Efficiency Particulate Air (HEPA) filters, to capture both particles and gases. Air purifiers can help remove airborne particles like dust, pollen, pet dander, and other pollutants known to cause allergies, creating a healthier home environment. They can also help eliminate harmful chemicals from indoor environments and reduce the chances of airborne diseases. Additionally, air purifiers can help reduce the buildup of dirt and debris inside HVAC systems, helping to keep them operating at their best. However, it is important to note that no air purifier can eliminate all pollutants from your home, and they may not be particularly useful for certain types of pollutants, such as mold, nicotine, and some types of VOCs. It is recommended to use air purifiers as a third option in the three basic strategies for improving home air quality, which include controlling the source of contaminants, improving your homes ventilation, and using effective air cleaners.