HEPA filters with antimicrobial protection are among the most powerful filtration systems, capturing 99.97% of airborne particles, including those as small as 0.3 microns (for comparison, a fine grain of sand is roughly 250 microns). These filters are effective in reducing allergy symptoms and can also help with asthma, frequent colds, and persistent coughing. Their high efficiency is why they are commonly used in environments like hospital operating rooms and other high-sterility settings.
Actual size: 15-3/4 x 20 x 1-3/4
Nominal size: 16 x 20 x 2