HEPA (High Efficiency Particulate Air) filtration technology is a highly effective air purification method developed in the 1940s by the U.S. Atomic Energy Commission to capture radioactive contaminants. Today, HEPA filters are widely used in homes, healthcare, industry, and aviation to filter microscopic particles and pollutants from the air.How Do HEPA Filters Work?HEPA filters are composed of a mat of randomly arranged fibers, usually made of fiberglass. These fibers form a dense network that traps particles through three main mechanisms:ImpactionLarger particles cannot follow the airstream around the fibers due to inertia. They collide with and adhere to the fibers.InterceptionMedium-sized particles follow the airflow but are intercepted and captured when they come within one fiber diameter of a fiber.DiffusionVery small particles (especially those below 0.1 microns) are influenced by Brownian motion, causing them to move erratically and increase the chance of colliding with and being trapped by the fibers.Through these mechanisms, HEPA filters can capture at least 99.97% of airborne particles 0.3 microns in diameter, including pollen, dust, smoke, mold spores, bacteria, and viruses.Classification of HEPA FiltersHEPA filters are classified based on their efficiency, ranging from H10 to H14. The higher the number, the more efficient the filter. H13 and H14 filters are the most efficient and are used in environments requiring extremely high levels of air purity, such as hos