An air filter can help protect you from allergies by capturing airborne particles such as dust, pollen, pet dander, and mold spores. These particles can trigger allergy symptoms such as sneezing, coughing, and wheezing in sensitive individuals.
Air filters work by forcing air through a dense material that captures these particles as they pass through. The material used in air filters can vary, but some common materials include fiberglass, polyester, and pleated paper.
The efficiency of an air filter is measured by its MERV rating (Minimum Efficiency Reporting Value), which ranges from 1 to 20. The higher the MERV rating, the more efficient the filter is at capturing small particles.