A HEPA (High-Efficiency Particulate Air) filter is a type of air filter that is designed to trap a large amount of very small particulate contaminants. These filters are highly effective at capturing particles of various sizes, making them a key component in many air purification systems
HEPA filters must meet specific standards of efficiency. For instance, a true HEPA filter must capture at least 99.97% of particles that are 0.3 microns in diameter.
The size of 0.3 microns is known as the most penetrating particle size (MPPS), meaning that particles of this size are the most difficult to capture. The filter's ability to capture these particles ensures it is effective for both smaller and larger particles.
HEPA filters are typically made from a mat of randomly arranged fibers, usually composed of fiberglass.
The fibers are arranged in a way that creates a dense network, which captures particles through several mechanisms: interception, impaction, and diffusion.
HEPA filters and HEPA air cleaners are vital tools for improving indoor air quality. By effectively capturing a wide range of airborne particles, they help create healthier living and working environments, reducing exposure to allergens, pollutants, and pathogens. Whether for residential or commercial use, these devices play a crucial role in maintaining clean air standards.