{"id":5862,"date":"2026-08-18T09:55:03","date_gmt":"2026-08-18T01:55:03","guid":{"rendered":"https:\/\/www.bacintl.com\/?p=5862"},"modified":"2026-08-18T08:34:15","modified_gmt":"2026-08-18T00:34:15","slug":"ffu-modular-layout-design-air%e2%80%91change-rate-matching-scheme-for-workshops-of-different-cleanliness-classes","status":"publish","type":"post","link":"https:\/\/www.bacintl.com\/fr\/ffu-modular-layout-design-air\u2011change-rate-matching-scheme-for-workshops-of-different-cleanliness-classes\/","title":{"rendered":"FFU Modular Layout Design & Air\u2011Change Rate Matching Scheme for Workshops of Different Cleanliness Classes"},"content":{"rendered":"

FFU clean workshops adopt an air\u2011circulation pattern with distributed ceiling\u2011mounted air supply and lower\u2011side air return. Layout follows the core principles: uniform arrangement, enhanced density for key zones, and partition\u2011based airflow control<\/strong>. FFUs are evenly deployed across the whole ceiling to guarantee baseline air\u2011change rates. Denser FFU arrangement is applied above core production zones, open\u2011material operation zones and high\u2011person\u2011density working areas to boost local air volume and cleanliness performance.<\/p>\n

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ISO Class\u202f8 (Class\u202f10\u202f000) Clean Workshop<\/strong>: Applied to general electronic assembly, food packaging and auxiliary warehouse areas. Standard air\u2011change rate: 20\u201130\u202ftimes\/h. FFUs are arranged in regular uniform distribution with H13\u2011grade HEPA filters; air velocity maintained at approximately 0.35\u202fm\/s to satisfy working conditions. Excessive dense deployment is not required for energy\u2011cost control.<\/p>\n

ISO Class\u202f7 (Class\u202f1\u202f000) Clean Workshop<\/strong>: Applied to medical\u2011device manufacturing, cosmetic filling and precision\u2011component processing. Standard air\u2011change rate: 30\u201140\u202ftimes\/h. FFUs are densely arranged over the whole ceiling, with secondary density enhancement for core\u2011process zones, to ensure uniform air velocity across the workshop, eliminate clean\u2011zone dead corners, and stably control particle and microorganism levels.<\/p>\n

ISO Class\u202f6 (Class\u202f100 transition zone) Clean Workshop<\/strong>: Applied to precision optical inspection and high\u2011end electronic packaging. Air\u2011change rate: 40\u201160\u202ftimes\/h. Fully\u2011covered layout of H14\u2011grade FFUs delivers constant\u2011velocity air supply to achieve near\u2011Class\u202f100 cleanliness across the workshop.<\/p>\n

ISO Class\u202f5 (Class\u202f100) Local Clean Zone<\/strong>: Cannot be realized by overall\u2011workshop renovation. High\u2011density clusters of H14\u2011grade FFUs shall be deployed to form local vertical laminar\u2011flow zones for high\u2011requirement scenarios such as aseptic sampling and chip inspection.<\/p>\n

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Key layout optimization points: FFU installation shall avoid ceiling lamps, maintenance access openings and fire\u2011protection facilities to ensure uniform air supply. Return\u2011air louvers shall be evenly distributed to prevent airflow accumulation caused by poor local return\u2011air performance. Independent air\u2011speed control shall be configured for different functional zones: reduce air speed in idle zones while running at full load for production zones, to realize dual targets of energy saving and qualified cleanliness.<\/p>","protected":false},"excerpt":{"rendered":"

For FFU\u2011equipped clean workshops, achieving qualified cleanliness depends not on sheer quantity of equipment, but on rational modular layout and precise matching of air\u2011change rates. Targeting clean workshops from ISO Class\u202f5 to ISO Class\u202f8, this paper provides standardized FFU layout modes, quantity ratios and air\u2011change\u2011rate parameters, to resolve common problems including uneven workshop cleanliness, local out\u2011of\u2011spec conditions and energy waste.<\/p>","protected":false},"author":3,"featured_media":5863,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[92],"tags":[],"class_list":["post-5862","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-technology"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/posts\/5862","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/comments?post=5862"}],"version-history":[{"count":2,"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/posts\/5862\/revisions"}],"predecessor-version":[{"id":5867,"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/posts\/5862\/revisions\/5867"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/media\/5863"}],"wp:attachment":[{"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/media?parent=5862"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/categories?post=5862"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/tags?post=5862"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}