{"id":32603,"date":"2021-05-03T08:52:11","date_gmt":"2021-05-03T06:52:11","guid":{"rendered":"https:\/\/obera.fr\/advice\/what-is-cadr-and-how-does-it-work\/"},"modified":"2025-05-07T10:22:16","modified_gmt":"2025-05-07T08:22:16","slug":"cadr-purificateur-d-air-explication","status":"publish","type":"post","link":"https:\/\/obera.fr\/en\/our-tips\/cadr-purificateur-d-air-explication\/","title":{"rendered":"What is CADR and how does it work?"},"content":{"rendered":"\n

What is CADR?<\/strong><\/h2>\n\n

CADR<\/strong>, or Clean Air Delivery Rate<\/strong>, is a standardized measurement that assesses the effectiveness of air purifiers in removing pollutants and allergens from indoor air. It indicates the speed at which an air purifier can remove specific particles from the air, such as smoke, pollen and dust. In simple terms, this is the throughput of the device multiplied by its efficiency rate on a reference particle size.<\/p>\n\n

CADR is essential for understanding the performance of an air purifier and its impact on indoor air quality. It measures the amount of purified air the unit can deliver per unit of time, usually expressed in (m3\/h). A higher CADR indicates a greater capacity to rapidly remove pollutants from the air.<\/p>\n\n

1\u03bcm = micrometer = 1\/1000 mm)<\/em><\/p>\n\n

What are CADR’s main measures?<\/strong><\/h2>\n\n

The CADR value enables direct comparison between different air purifiers. The user thus receives a tool that enables him to objectively contrast different devices. In principle, the higher the value, the better.<\/p>\n\n

CADR comprises three main measurements: CADR for smoke particles, CADR for pollen particles and CADR for dust particles. Each measurement indicates an air purifier’s ability to specifically remove these types of particles from the air.<\/p>\n\n

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\"smoke<\/figure>\n<\/div>\n\n\n\n
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\"closeup<\/figure>\n<\/div>\n\n\n\n
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\"dust<\/figure>\n<\/div>\n<\/div>\n\n
\n
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The CADR for smoke particles<\/strong> measures the air purifier’s efficiency in eliminating fine particles produced by combustion, such as cigarette smoke or kitchen fumes. A high CADR for smoke particles indicates a better ability to eliminate these pollutants.<\/p>\n<\/div>\n\n\n\n

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The CADR for pollen particles<\/strong> measures the air purifier’s efficiency in removing pollen particles from the air. This is important for people with pollen allergies, as a high CADR for pollen particles helps reduce allergy symptoms.<\/p>\n<\/div>\n\n\n\n

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The CADR for dust particles<\/strong> measures the air purifier’s efficiency in removing dust and dirt particles. A high reading indicates a greater capacity to eliminate these particles, improving the overall cleanliness of indoor air.<\/p>\n<\/div>\n<\/div>\n\n

These three CADR measurements can be used to determine the overall efficiency of an air purifier for different types of contaminants, providing a valuable indication of how to choose the right device for your specific indoor air quality needs.<\/p>\n\n

How important is CADR for indoor air quality?<\/strong><\/h2>\n\n
    \n
  • CADR is an essential indicator of indoor air quality, enabling you to choose an air purifier adapted to the specific needs of an enclosed space. The right CADR helps to improve the health and well-being of the room’s occupants.<\/li>\n\n\n\n
  • A high CADR for smoke, pollen and dust particles helps reduce allergens and pollutants in indoor air, which is beneficial for allergy sufferers and those with respiratory problems.<\/li>\n\n\n\n
  • An optimal CADR also improves the overall air quality in an enclosed space by eliminating harmful particles and promoting a healthier, cleaner atmosphere.<\/li>\n<\/ul>\n\n

    How do I choose a device with the right CADR?<\/strong><\/h2>\n\n

    When choosing an air purification unit, it’s important to consider which CADR is right for your needs. Here are a few tips to help you make the right choice:<\/p>\n\n

    CADR calculation<\/strong><\/h3>\n\n

    Determine the CADR required according to room size and specific needs. An air purifier must have a CADR high enough to effectively cover the surface area of the room.<\/p>\n\n

    Device comparison<\/strong><\/h3>\n\n

    Find out about the different models of air purification units available and compare their respective CADRs for smoke, pollen and dust particles. Choose the one that best suits your needs.<\/p>\n\n

    Additional considerations<\/strong><\/h3>\n\n

    In addition to the CADR, consider other important factors such as the unit’s noise level, energy consumption, additional features (such as HEPA filters), and any air quality certifications.<\/p>\n\n

    Detailed explanation and background knowledge<\/strong><\/h2>\n\n

    For the test, exactly 28.5 m\u00b3 of space<\/strong> is used, which is thoroughly cleaned before each run and standardized with specific surface requirements. To test the filter performance of a unit, a precise quantity of dust, pollen or smoke particles is placed in the room. After a one-minute waiting period, the filtration test begins. At one-minute intervals, exposure to particles in space is measured for 20 seconds.<\/p>\n\n

    The test ends after 20 minutes for dust and smoke particles<\/strong>, and after 10 minutes for larger pollen particles. The background to the reduction in pollen measurement time simply lies in the fact that pollen particles are by far the coarsest and are therefore filtered out the fastest. The measurements provide very precise information on the number of particles an air purifier handles in practice. Small variations resulting from the fact that the particles are not 100% exactly uniformly distributed in space<\/strong> can be neglected by the length of the test.<\/p>\n\n

    The particle size for each pollutant size is given and the average size is indicated as follows.<\/p>\n\n

      \n
    • Smoke (\u00d8 0.09\u03bcm – 1.0\u03bcm)<\/li>\n\n\n\n
    • Dust (\u00d8 0.5\u03bcm – 3.0\u03bcm)<\/li>\n\n\n\n
    • Pollen (\u00d8 5.0\u03bcm – 11.0\u03bcm)<\/li>\n<\/ul>\n\n

      For hospitals and research institutes, the Minimum Efficiency Reporting Value (MERV) is also used. This calculates the lowest possible filtration value for particle sizes of 0.3\u03bcm – 10\u03bcm.<\/p>\n\n

      In conclusion, CADR is a key indicator of the performance of air purifiers and their ability to improve indoor air quality. Understanding CADR measurements and choosing the right CADR device are essential steps in ensuring clean, healthy air in your indoor environment.<\/p>\n","protected":false},"excerpt":{"rendered":"

      CADR stands for Clean Air Delivery Rate. Translated, this is the clean air delivery rate. In simple terms, this is the maximum flow rate of the device multiplied by its efficiency rate on a reference particle size.<\/p>\n","protected":false},"author":4,"featured_media":93614,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Qu'est-ce que CADR d\u2019un purificateur d\u2019air ?","_seopress_titles_desc":"L'abr\u00e9viation CADR vient de l'anglais et signifie Clean Air Delivery Rate. Traduit, il s'agit du taux de d\u00e9livrance d\u2019air pur. A quoi ca sert ? dans quel but ?","_seopress_robots_index":"","footnotes":""},"categories":[309],"tags":[18],"class_list":["post-32603","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-our-tips","tag-entete-small","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50","no-featured-image-padding","resize-featured-image"],"acf":[],"_links":{"self":[{"href":"https:\/\/obera.fr\/en\/wp-json\/wp\/v2\/posts\/32603","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/obera.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/obera.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/obera.fr\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/obera.fr\/en\/wp-json\/wp\/v2\/comments?post=32603"}],"version-history":[{"count":4,"href":"https:\/\/obera.fr\/en\/wp-json\/wp\/v2\/posts\/32603\/revisions"}],"predecessor-version":[{"id":65868,"href":"https:\/\/obera.fr\/en\/wp-json\/wp\/v2\/posts\/32603\/revisions\/65868"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/obera.fr\/en\/wp-json\/wp\/v2\/media\/93614"}],"wp:attachment":[{"href":"https:\/\/obera.fr\/en\/wp-json\/wp\/v2\/media?parent=32603"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/obera.fr\/en\/wp-json\/wp\/v2\/categories?post=32603"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/obera.fr\/en\/wp-json\/wp\/v2\/tags?post=32603"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}