Epurair MA-1 HEPA FILTER – Smoke Test

HEPA filters can remove at least 99.97% of airborne particles 0.3 micrometers (µm) in diameter. Particles of this size are the most difficult to filter and are thus considered the most penetrating particle size (MPPS). Particles that are larger or smaller are filtered with even higher efficiency. en.wikipedia.org ... Epurair HEPA Filter High Efficiency Particulate Air Ventilation Purifier Quality Medicine Asthma Allergies