2006-10-21 09:37:20 · 2 answers · asked by Nathan B 1 in Health ➔ General Health Care ➔ Other - General Health Care
HEPA (IPA: [ˈhɛpə]) is an acronym for "high efficiency particulate absorbing" or "high efficiency particulate arrestance" or, as officially defined by the Department of Energy (DOE), "high efficiency particulate air".
This type of air filter can theoretically remove at least 99.97% of dust, pollen, mould, bacteria and any airborne particles with a size of 0.3 micrometres (µm) at 85 litres per minute (L/min).
2006-10-21 09:50:24 · answer #1 · answered by tampico 6 · 0⤊ 0⤋
This type of air filter can theoretically remove at least 99.97% of dust , pollen , mould, bacteria and any airborne particles with a size of 0.3 micrometres (µm) at 85 litres per minute (L/min). The diameter specification of 0.3 responds to the most penetrating particle size (MPPS). Particles that are smaller or larger are trapped with even higher efficiency. Using the worst case particle size results in the worst case efficiency rating (i.e. 99.97% or better for all particle sizes).
2006-10-21 17:20:09 · answer #2 · answered by chuck16023 2 · 0⤊ 0⤋