Hepa filter Origin BV150

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Hepa Filter for the Origin 150BV HEPA Backpack

HEPA is a type of pleated mechanical air filter. It is an acronym for "high-efficiency particulate air [filter]".  This type of air filter can theoretically remove at least 99.97% of dust, pollen, mold, bacteria, and any airborne particles with a size of 0.3 microns (µm). The diameter specification of 0.3 microns responds to the worst case; the most penetrating particle size (MPPS). Particles that are larger or smaller 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).

All air cleaners require periodic cleaning and filter replacement to function properly.  Follow manufacturer's recommendations on maintenance and replacement. Some filters are washable but may deteriorate in that process. HEPA filters need replacing before they block up which may cause strain on the vacuum motor that relies on free-flowing air to cool.