The Microparticle Performance Rating (MPR) is an
Air filter
A particulate air filter is a device composed of fibrous, or porous materials which removes solid particulates such as dust, pollen, mold, and bacteria from the air. Filters containing an adsorbent or catalyst such as charcoal (carbon) may als ...
rating system created by the company
3M. It rates the ability of an air filter to filter out micro particles.
Because MPR was created by 3M, it only applies to filters produced by the 3M brand.
The higher the MPR, the better the filter's ability to capture particles from the air as it passes through the filter.
MPR is different from
MERV
Merv ( tk, Merw, ', مرو; fa, مرو, ''Marv''), also known as the Merve Oasis, formerly known as Alexandria ( grc-gre, Ἀλεξάνδρεια), Antiochia in Margiana ( grc-gre, Ἀντιόχεια ἡ ἐν τῇ Μαργιανῇ) and ...
, the Minimum Efficiency Reporting Value. The MERV system measures a filter's ability to capture large particles. The MPR only takes into account the microscopic particles between 0.3 and 1 µm.
References
External links
MPR vs. MERV a piece of 3M promotional material giving some minimum capture rates for rating levels.
Filtration
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