HEPA filters are often referred to as P100. What is the actual maximum amount they filter?

HEPA filters, which stand for High-Efficiency Particulate Air filters, are recognized for their ability to capture a significant percentage of particles. The term P100 is often used to describe these filters, indicating that they are capable of filtering out at least 99.97% of particles that are 0.3 microns in size. This level of efficiency is crucial, particularly in environments where air quality is paramount, such as in healthcare facilities, laboratories, and during lead abatement work.

The figure of 99.7% is derived from tests that show that these filters can effectively capture particles, including dust, allergens, and other contaminants, demonstrating their robust filtering capabilities. The high level of filtration is what makes HEPA filters essential for protecting health and maintaining safety standards in various settings.