Minimum Efficiency Reporting Value, commonly known as MERV, is a measurement scale designed in 1987 by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) to report the effectiveness of air filters in more detail than other ratings. For example, often a HEPA filter is impractical in residential central HVAC systems due to the large pressure drop the dense filter material causes. Experiments indicate that less obstructive, medium-efficiency filters of MERV 7 to 13 are almost as effective as true HEPA filters at removing allergens within residential air handling units.
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| - Minimum efficiency reporting value (fr)
- Minimum efficiency reporting value (en)
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| - La cote minimum efficiency reporting value, plus connue sous le nom de cote MERV, est une échelle de mesure conçue en 1987 par l'American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) pour mesurer l'efficacité des filtres à air. Cette échelle représentait « un bond en avant dans la précision et l'exactitude de la mesure de l'efficacité des filtres à air ». (fr)
- Minimum Efficiency Reporting Value, commonly known as MERV, is a measurement scale designed in 1987 by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) to report the effectiveness of air filters in more detail than other ratings. For example, often a HEPA filter is impractical in residential central HVAC systems due to the large pressure drop the dense filter material causes. Experiments indicate that less obstructive, medium-efficiency filters of MERV 7 to 13 are almost as effective as true HEPA filters at removing allergens within residential air handling units. (en)
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| - La cote minimum efficiency reporting value, plus connue sous le nom de cote MERV, est une échelle de mesure conçue en 1987 par l'American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) pour mesurer l'efficacité des filtres à air. Cette échelle représentait « un bond en avant dans la précision et l'exactitude de la mesure de l'efficacité des filtres à air ». Cette échelle a permis d'atteindre des améliorations à la santé tout en réduisant les coûts dans les systèmes de chauffage, ventilation et climatisation. Par exemple, un filtre avec une cote MERV adéquate peut remplacer un filtre HEPA couteux et parfois inapproprié dans un système central à cause de la diminution de pression occasionnée par la densité du filtre HEPA. Des études ont démontré qu'un filtre avec un MERV moyen de 7 à 13 est presque aussi efficace pour éliminer les allergènes qu'un filtre HEPA beaucoup plus couteux à installer et à entretenir. (fr)
- Minimum Efficiency Reporting Value, commonly known as MERV, is a measurement scale designed in 1987 by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) to report the effectiveness of air filters in more detail than other ratings. For example, often a HEPA filter is impractical in residential central HVAC systems due to the large pressure drop the dense filter material causes. Experiments indicate that less obstructive, medium-efficiency filters of MERV 7 to 13 are almost as effective as true HEPA filters at removing allergens within residential air handling units. The scale is designed to represent the worst-case performance of a filter when dealing with particles in the range of 0.3 to 10 micrometers. The MERV value is from 1 to 20. Higher MERV values correspond to a greater percentage of particles captured on each pass, with a MERV 16 filter capturing more than 95% of particles over the full range. The table displayed below is a grouping of MERV values by particle size: While the lowest MERV value in each row has no minimum requirement for filtering the particle size for that row, it does have stricter requirements for all larger particle sizes than any lower MERV value. For example, MERV 13 has no minimum requirement for removing 0.3–1.0 μm particles (the standard specifies <75%) but has higher minimum requirements for removing 1.0–3.0 μm, 3.0–10.0 μm, and > 10 μm particles than MERV 12 and all lower MERV values. All other MERV values on each row do have minimum removal percentages for that row's particle size. (en)
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