The acronym "HEPA" refers to what?

The acronym "HEPA" stands for High-Efficiency Particulate Air. It refers specifically to a type of air particle filter that is designed to trap a significant amount of very small particles, including allergens, dust, pet dander, and some types of bacteria and viruses. HEPA filters are particularly effective in improving indoor air quality by capturing pollutants that can be harmful to respiratory health. They must meet rigorous standards set by the U.S. Department of Energy (DOE), capturing at least 99.97% of particles that are 0.3 microns in diameter.

This filtering capability makes HEPA filters widely used in various applications, including residential air purifiers, vacuum cleaners, and HVAC systems in healthcare facilities. Their effectiveness sets them apart from other types of filters that may not capture as high a percentage of particulate matter, thereby ensuring cleaner air for users.