{"id":236,"date":"2026-07-30T00:38:45","date_gmt":"2026-07-30T00:38:45","guid":{"rendered":"https:\/\/fenggu-bio.com\/iso-14644-cleanroom-classification\/"},"modified":"2026-08-04T05:29:48","modified_gmt":"2026-08-04T05:29:48","slug":"iso-14644-cleanroom-classification","status":"publish","type":"post","link":"https:\/\/fenggu-bio.com\/ru\/iso-14644-cleanroom-classification\/","title":{"rendered":"ISO 14644-1 Cleanroom Classification Explained (with EU GMP Grade Comparison)"},"content":{"rendered":"<style>\n.entry-title,.ast-single-post .entry-header{display:none!important}\n.fg-art{font-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Roboto,\"Helvetica Neue\",Arial,sans-serif;color:#1e2838;line-height:1.72;max-width:820px;margin:0 auto;padding:0 22px;font-size:16.5px}\n.fg-art .fg-eyebrow{display:inline-block;background:#e3ecfa;color:#003AA1;font-weight:700;font-size:12px;letter-spacing:.7px;padding:5px 13px;border-radius:20px;text-transform:uppercase;margin:34px 0 14px}\n.fg-art h1{font-size:33px;line-height:1.2;color:#002B78;margin:0 0 12px;font-weight:800}\n.fg-art .meta{font-size:13.5px;color:#7a8699;margin:0 0 26px;border-bottom:1px solid #e6ebf3;padding-bottom:18px}\n.fg-art h2{font-size:23px;color:#002B78;margin:38px 0 12px;line-height:1.28}\n.fg-art p{margin:0 0 16px}\n.fg-art .lead{font-size:18px;color:#3a4658}\n.fg-art figure{margin:26px 0}\n.fg-art img{width:100%;border-radius:12px;box-shadow:0 6px 22px rgba(0,58,161,.12);display:block}\n.fg-art figcaption{font-size:13px;color:#7a8699;margin-top:9px;text-align:center}\n.fg-art table{border-collapse:collapse;width:100%;margin:22px 0;font-size:14.5px}\n.fg-art th,.fg-art td{border:1px solid #d7dfea;padding:11px 14px;text-align:left;vertical-align:top}\n.fg-art thead th{background:#002B78;color:#fff;font-weight:700}\n.fg-art tbody th{background:#eff4fb;color:#002B78;font-weight:700;width:24%}\n.fg-art tbody tr:nth-child(even) td{background:#f7f9fc}\n.fg-art ul{margin:0 0 16px;padding-left:22px}.fg-art li{margin:7px 0}\n.fg-art .fg-cta{background:linear-gradient(120deg,#002B78,#003AA1);color:#fff;border-radius:14px;padding:30px 28px;margin:38px 0 10px;text-align:center}\n.fg-art .fg-cta h3{color:#fff;font-size:22px;margin:0 0 8px}\n.fg-art .fg-cta p{color:#dce7f7;margin:0 0 18px;font-size:15.5px}\n.fg-art .fg-btn{display:inline-block;background:#EC001B;color:#fff;padding:13px 28px;border-radius:6px;font-weight:600;font-size:15.5px;text-decoration:none;margin:0 6px 8px}\n.fg-art .fg-btn.o{background:transparent;border:2px solid rgba(255,255,255,.7)}\n.fg-art a{color:#003AA1;text-decoration:underline}\n.fg-art .fg-cta a{text-decoration:none;color:#fff}\n@media(max-width:640px){.fg-art h1{font-size:26px}.fg-art th,.fg-art td{padding:9px 10px;font-size:13.5px}.fg-art tbody th{width:34%}}\n<\/style>\n<article class=\"fg-art\">\n<span class=\"fg-eyebrow\">Cleanroom Standards<\/span><\/p>\n<h1>ISO 14644-1 Cleanroom Classification Explained (with EU GMP Grade Comparison)<\/h1>\n<div class=\"meta\">By Fenggu Medical Equipment &middot; Pharmaceutical Isolation &amp; Containment<\/div>\n<p class=\"lead\">In pharmaceutical and biotech manufacturing, the cleanroom class defines how clean the air has to be \u2014 and that, in turn, decides which containment, barrier and air-handling equipment you need. <strong>ISO 14644-1<\/strong> is the global standard for classifying cleanroom air cleanliness by particle concentration. Here is what each class means and how it maps to the <strong>\u041f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435 1 \u043a GMP \u0415\u0421<\/strong> grades your auditors work to.<\/p>\n<h2>What ISO 14644-1 Defines<\/h2>\n<p>ISO 14644-1 classifies a cleanroom by the <strong>maximum concentration of airborne particles per cubic meter<\/strong>, measured at defined particle sizes (commonly \u22650.5 \u00b5m). Classes run from ISO 1 (cleanest) through ISO 9. For pharmaceutical work, the range that matters is <strong>ISO 5 to ISO 8<\/strong>. The lower the ISO number, the cleaner the air and the more demanding the equipment and air changes required to hold it.<\/p>\n<figure>\n<img width=\"1200\" height=\"800\" decoding=\"async\" src=\"\/wp-content\/uploads\/site\/iso14644-classification.png\" alt=\"ISO 14644-1 cleanroom classification compared to EU GMP Grade A B C D with particle limits\"><figcaption>ISO 14644-1 classes mapped to EU GMP grades and particle limits (at-rest).<\/figcaption><\/figure>\n<h2>The ISO Classes That Matter for Pharma<\/h2>\n<ul>\n<li><strong>ISO 5<\/strong> \u2014 the cleanest environment used routinely; the critical zone for aseptic filling and open product handling.<\/li>\n<li><strong>ISO 6<\/strong> \u2014 sterile preparation and high-grade support.<\/li>\n<li><strong>ISO 7<\/strong> \u2014 clean background\/support areas surrounding the critical zone.<\/li>\n<li><strong>ISO 8<\/strong> \u2014 less-critical support areas such as material airlocks and gowning.<\/li>\n<\/ul>\n<h2>ISO 14644-1 vs EU GMP Annex 1 Grades<\/h2>\n<p>EU GMP Annex 1 uses <strong>Grades A, B, C and D<\/strong>, and \u2014 unlike a single ISO measurement \u2014 it requires classification in <strong>two states: &#8220;at rest&#8221; and &#8220;in operation.&#8221;<\/strong> A room can meet a cleaner ISO class at rest but be allowed a higher particle count while people and processes are running. The at-rest mapping is shown above; in operation the limits differ:<\/p>\n<table>\n<thead>\n<tr>\n<th>EU GMP Grade<\/th>\n<th>At rest (\u2248 ISO)<\/th>\n<th>In operation (\u2248 ISO)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th>Grade A<\/th>\n<td>ISO 5<\/td>\n<td>ISO 5<\/td>\n<\/tr>\n<tr>\n<th>Grade B<\/th>\n<td>ISO 5<\/td>\n<td>ISO 7<\/td>\n<\/tr>\n<tr>\n<th>Grade C<\/th>\n<td>ISO 7<\/td>\n<td>ISO 8<\/td>\n<\/tr>\n<tr>\n<th>Grade D<\/th>\n<td>ISO 8<\/td>\n<td>Not defined \/ risk-based<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>This &#8220;at rest vs in operation&#8221; split is why Grade A critical zones are almost always protected by a barrier system that holds ISO 5 continuously, even during intervention.<\/p>\n<h2>Why Cleanroom Class Drives Equipment Selection<\/h2>\n<p>The target class dictates the hardware. A <strong>Grade A \/ ISO 5 critical zone<\/strong> is typically maintained with an <a href=\"\/ru\/products\/sterility-test-isolator\/\">isolator<\/a> or <a href=\"\/ru\/products\/open-rabs-orabs\/\">open RABS<\/a> supplying unidirectional (laminar) airflow through <a href=\"\/ru\/products\/laminar-flow-hood\/\">H14 HEPA filtration<\/a>. Material moving between grades passes through a <a href=\"\/ru\/products\/vhp-pass-box\/\">VHP or dynamic pass box<\/a> sized to the grade difference, and exhaust from containment areas is handled by <a href=\"\/ru\/products\/bibo-filter-housing\/\">BIBO filter housings<\/a>. Get the class right first, and the equipment specification follows logically.<\/p>\n<div class=\"fg-cta\">\n<h3>Building to a specific cleanroom grade?<\/h3>\n<p>Tell us your target ISO class \/ GMP grade and process, and our engineers will recommend the isolation, transfer and filtration equipment to match.<\/p>\n<p><a class=\"fg-btn\" href=\"\/ru\/products\/\">\u041e\u0437\u043d\u0430\u043a\u043e\u043c\u044c\u0442\u0435\u0441\u044c \u0441 \u0430\u0441\u0441\u043e\u0440\u0442\u0438\u043c\u0435\u043d\u0442\u043e\u043c \u043f\u0440\u043e\u0434\u0443\u043a\u0446\u0438\u0438<\/a><br \/>\n<a class=\"fg-btn o\" href=\"\/ru\/contact\/\">Talk to an Engineer<\/a>\n<\/div>\n<\/article>","protected":false},"excerpt":{"rendered":"<p>Cleanroom Standards ISO 14644-1 Cleanroom Classification Explained (with EU GMP Grade Comparison) By Fenggu Medical Equipment &middot; Pharmaceutical Isolation &amp; [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-236","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/fenggu-bio.com\/ru\/wp-json\/wp\/v2\/posts\/236","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fenggu-bio.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fenggu-bio.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/fenggu-bio.com\/ru\/wp-json\/wp\/v2\/comments?post=236"}],"version-history":[{"count":2,"href":"https:\/\/fenggu-bio.com\/ru\/wp-json\/wp\/v2\/posts\/236\/revisions"}],"predecessor-version":[{"id":278,"href":"https:\/\/fenggu-bio.com\/ru\/wp-json\/wp\/v2\/posts\/236\/revisions\/278"}],"wp:attachment":[{"href":"https:\/\/fenggu-bio.com\/ru\/wp-json\/wp\/v2\/media?parent=236"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fenggu-bio.com\/ru\/wp-json\/wp\/v2\/categories?post=236"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fenggu-bio.com\/ru\/wp-json\/wp\/v2\/tags?post=236"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}