{"id":11976,"date":"2024-10-23T18:17:25","date_gmt":"2024-10-23T10:17:25","guid":{"rendered":"https:\/\/smartairfilters.com\/?p=11976"},"modified":"2024-10-23T18:17:27","modified_gmt":"2024-10-23T10:17:27","slug":"dyson-pure-cool-air-purifier-filter-review","status":"publish","type":"post","link":"https:\/\/smartairfilters.com\/zh\/blog\/dyson-pure-cool-air-purifier-filter-review\/","title":{"rendered":"Dyson Pure Cool Air Purifier Review: Shockingly Bad"},"content":{"rendered":"Dyson’s Pure Cool air purifier looks impressive. However a review of its clean air rating (CADR) reveals this filter does a poor job of providing clean air – the Dyson TP05 Pure Cool’s CADR comes in at just 164m3<\/sup>\/hr. That means the Dyson Pure Cool air purifier out as much clean air as a $20 DIY air purifier. Read on to learn more.\n\n\"DIY\n

Dyson Pure Cool Air Purifier Review<\/h2>\nWhen Dyson launched their Dyson Pure Cool Air Purifier, I was excited to see what new tech or super-efficient design they would bring to the show. But what I found was a let down. Dyson hadn’t changed air purifiers. They’d just changed their marketing around air purifiers.\n\nMaybe I shouldn’t have been surprised. After all, purifiers are just fans and filters. They’re so simple anyone can DIY their own<\/a>.\n\n\"Dyson\n\nBut when Dyson’s purifiers achieved terrible results in the industry standard test, Dyson started criticizing the test. That industry standard test is the “clean air delivery rate<\/a>” (CADR). Here’s what the test looks like:\n\n\"Sqair\n\nIt’s true, the CADR test isn’t perfect and it has its downfalls (CADR tests are done in a lab, not real-world rooms). However, Dyson seemed to go quite far in criticizing the CADR test.  Due to the poor results of the Dyson’s Pure Cool Air Purifier in the industry standard CADR test, Dyson markets their own tests which make the purifiers seem<\/em> to perform better.  Dyson got a few things wrong about CADR. Let’s clear things up.<\/a>\n

Three Facts Dyson Got Wrong About CADR<\/h2>\nDyson makes claims to defend the Pure Cool air purifier and their other product’s low CADR rating.  But many of their claims trying to discredit the air purifier industry standard are false.\n

Dyson Claim #1: CADR doesn\u2019t focus on different particle sizes.<\/h4>\nDyson’s website claims that CADR doesn\u2019t \u201cfocus on how well a purifier captures different particles sizes.” That’s flat wrong. There are essentially two standards for CADR tests. The AHAM (US) test and the GB-18801 (China) standard. The US standard tests for particles in three ranges<\/a>, which they call “dust,” “pollen,” and “smoke.”\n\n\n\n\n\n\n\n
Particle Name<\/th>\nParticle Size Range<\/th>\n<\/tr>\n<\/thead>\n
Smoke (Tobacco)<\/td>\n0.09 \u2013 1.0 microns<\/td>\n<\/tr>\n
Dust<\/td>\n0.5 \u2013 3.0 microns<\/td>\n<\/tr>\n
Pollen<\/td>\n0.5 \u2013 11 microns<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\nThe Chinese GB-18801 standard also tests and reports filter efficiency for particles ranging 0.30 \u2013 10 microns. That covers from the smallest, hardest-to-capture 0.3 micron particles, all the way to large dust and pollen particles. Here are the CADR test results for Smart Air\u2019s Sqair air purifier<\/a>.\n\n\"Smart\n\n
Bottom Line<\/div>
Bottom Line:<\/div>
CADR tests do report efficiency for different particle ranges.<\/div>
Smart Air<\/div><\/div>\n

Dyson Claim #2: CADR doesn\u2019t measure filtration efficiency<\/h4>\nThis one\u2019s right, but misses the point. There are two main ways to describe an air purifier effectiveness:\n
    \n \t
  1. When air passes once through the filter, what percentage of particles does it filter out?<\/li>\n \t
  2. In a given amount of time, what percentage decrease in particles in the room air<\/strong> did the purifier achieve?<\/li>\n<\/ol>\n\"Closeup\n\nThe whole-room effectiveness of Dyson’s Pure Cool air purifier is really what most users care about, and that’s what the CADR test measures. For single-pass filtration, there’s a separate official test and rating system for that, the EN1822<\/a> test. Elsewhere on their website Dyson mentions that test, so they’re aware of it.\n\n\"Dyson\n\nNerd Note:<\/strong> The EN1822<\/a> is what defines the HEPA standards like H13 we often see. If we want to know about single pass filter efficiency, then we should look at the HEPA filter’s rating (e.g. H13\/H14 etc.).\n\nSo this claim is like criticizing a basketball game for not measuring dunking performance. If you want to focus on dunks, there are dunk contests that do that. It’s not the main purpose of basketball games.\n\n\"air\n\n
    Bottom Line<\/div>
    <\/div>
    CADR tests a purifier’s ability to purifier a whole-room. For HEPA filter efficiency, then we should use the EN1822 HEPA rating system instead.<\/div>
    Smart Air<\/div><\/div>\n

    Dyson Claim #3: CADR only tests for particles<\/h4>\nThis is wrong. In fact, Dyson even contradicts themselves on this one. On their English website they say CADR tests for particulate. But on Dyson’s Chinese Tmall product page, they provide CADR results for benzene and formaldehyde (gases).\n\n\"Dyson\n\nThe GB-18801 CADR test covers testing VOC gases such as benzene and formaldehyde too.\n\nIt’s possible that Dyson is only referring to the US (AHAM) test here.True, the AHAM test doesn’t specifically state that it can test for gases, although the EPA explains<\/a> that it can.\n\n\"CADR\n\n
    Bottom Line<\/div>
    Summary on Dyson's Air Purifier & CADR Claims<\/div>
    CADR tests have their downsides, primarily that they don\u2019t represent real-world rooms. It\u2019s great to see Dyson promoting real-world tests for air purifiers, just like Smart Air<\/a>. However, CADR tests still have their use in helping air breathers make informed choices when buying air purifiers.  CADR ratings should not be thrown out just because it performs poorly, such as Dyson’s Pure Cool Air Purifier <\/div>
    Smart Air<\/div><\/div>\n\n\"Dyson\n\nIf Dyson is reading this, what can they do?<\/strong>\n\n#1 – Be Open About the Pure Cool air purifier’s CADR Rating and Internal Test Results.<\/strong>\n\nIt’s really difficult to find information on the CADR on the Dyson website. If Dyson provided this – along with results from their own internal tests – consumers will have more information on hand to make better informed decisions. Data rules!\n\nTo find the Pure Cool’s CADR, we had to scour Dyson’s Chinese shop for details. In China, CADR results are required by law. We found the TP05’s particulate CADR of 164m3<\/sup>\/hr, and a formaldehyde CADR of 56m3<\/sup>\/hr at the very bottom of their TMall page.<\/a>\n\n\"Dyson\n\n#2 – Publish the details of the Dyson internal ‘TM-003711’ test method<\/strong>.\n\nDyson Engineer David Hill<\/a> said “We believe all air purifiers should be tested this way [using Dyson’s method]”. If Dyson’s test really is better than CADR, then openly publishing the testing method will benefit all air-breathers around the world.\n\nUpdate: <\/strong>Dyson contacted us to say that they have published the testing method<\/a> (although only in Chinese). It’s worth noting, however, that this test method is for testing an air purifier’s ‘smart mode’. More specifically, it tests the accuracy of an air purifier’s built-in air quality monitor, and its ability to react to nearby pollutants. Although this is a much-needed test, this is different from a filtration effectiveness test. That means it shouldn’t replace CADR tests, but be used as an additional test for purifiers that contain air quality monitors.\n

    \"Dyson<\/h3>\nUPDATE: 20th February, 2021<\/strong>\n\nDyson got in touch with us to clarify their position on CADR:\n
    We simply don\u2019t engineer purifiers to perform well at this test [CADR] as we don\u2019t believe it to be useful for consumers, but rather we choose to develop machines that perform well in real homes, in a test that more accurately demonstrates real-world performance.<\/blockquote>\n\n
    \n\n

    <\/h3>\n

    About Smart Air<\/h3>\nThe air purifier industry is opaque. It’s profit-driven, not health-driven. Big companies charge hundreds or thousands of dollars for technology that was invented over 70 years ago. We created Smart Air to bring open data and simple, effective air purifiers<\/a> to opaque industry. We provide no-nonsense, honest purifiers to people (like us) who just want to breathe safe air.","protected":false},"excerpt":{"rendered":"

    Dyson’s Pure Cool air purifier looks impress … <\/p>\n

    Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":34310,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"13492,20657,22029,20947,19028,6631","_relevanssi_noindex_reason":"","footnotes":""},"categories":[190,262],"tags":[283,81,205,592,238,151,269,285,294],"class_list":["post-11976","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-air-purifiers","category-reviews","tag-air-purifier","tag-big-brand-air-filters","tag-cadr","tag-dyson","tag-effectiveness","tag-formaldehyde","tag-india","tag-review","tag-vocs","resize-featured-image"],"acf":[],"_links":{"self":[{"href":"https:\/\/smartairfilters.com\/zh\/wp-json\/wp\/v2\/posts\/11976","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/smartairfilters.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/smartairfilters.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/smartairfilters.com\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/smartairfilters.com\/zh\/wp-json\/wp\/v2\/comments?post=11976"}],"version-history":[{"count":7,"href":"https:\/\/smartairfilters.com\/zh\/wp-json\/wp\/v2\/posts\/11976\/revisions"}],"predecessor-version":[{"id":34309,"href":"https:\/\/smartairfilters.com\/zh\/wp-json\/wp\/v2\/posts\/11976\/revisions\/34309"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/smartairfilters.com\/zh\/wp-json\/wp\/v2\/media\/34310"}],"wp:attachment":[{"href":"https:\/\/smartairfilters.com\/zh\/wp-json\/wp\/v2\/media?parent=11976"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/smartairfilters.com\/zh\/wp-json\/wp\/v2\/categories?post=11976"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/smartairfilters.com\/zh\/wp-json\/wp\/v2\/tags?post=11976"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}