{"id":2908,"date":"2022-04-23T02:15:36","date_gmt":"2022-04-23T02:15:36","guid":{"rendered":"https:\/\/www.wehopower.com\/?post_type=news&#038;p=2908"},"modified":"2026-10-07T16:17:36","modified_gmt":"2026-10-07T08:17:36","slug":"something-you-should-know-about-cooling-fan","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/tl\/news\/something-you-should-know-about-cooling-fan\/","title":{"rendered":"Power Supply Cooling Fans: Airflow and Service Access for OEM Equipment"},"content":{"rendered":"<p><strong>Last Updated:<\/strong> October 7, 2026<\/p>\n<p><strong>Quick Answer:<\/strong> A power supply cooling fan helps move heat away from internal parts, but selecting a fan-cooled supply requires more than checking that a fan is present. OEM teams need the exact revision, documented airflow direction, a serviceable cabinet path and equipment-level thermal verification. Do not infer fan speed control, intake direction or installation clearance from a catalog photograph.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Talaan ng mga Nilalaman<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">I-toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.wehopower.com\/tl\/news\/something-you-should-know-about-cooling-fan\/#Separate_component_identity_from_installation_approval\" >Separate component identity from installation approval<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.wehopower.com\/tl\/news\/something-you-should-know-about-cooling-fan\/#Review_the_complete_airflow_path\" >Review the complete airflow path<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.wehopower.com\/tl\/news\/something-you-should-know-about-cooling-fan\/#Keep_maintenance_access_practical\" >Keep maintenance access practical<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.wehopower.com\/tl\/news\/something-you-should-know-about-cooling-fan\/#Establish_an_equipment_thermal_acceptance_record\" >Establish an equipment thermal acceptance record<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.wehopower.com\/tl\/news\/something-you-should-know-about-cooling-fan\/#Review_dust_and_service_conditions\" >Review dust and service conditions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.wehopower.com\/tl\/news\/something-you-should-know-about-cooling-fan\/#OEM_procurement_checklist\" >OEM procurement checklist<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.wehopower.com\/tl\/news\/something-you-should-know-about-cooling-fan\/#Key_Takeaways\" >Key Takeaways<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.wehopower.com\/tl\/news\/something-you-should-know-about-cooling-fan\/#Conclusion\" >Konklusyon<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.wehopower.com\/tl\/news\/something-you-should-know-about-cooling-fan\/#Frequently_Asked_Questions\" >Frequently Asked Questions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.wehopower.com\/tl\/news\/something-you-should-know-about-cooling-fan\/#Does_a_visible_fan_prove_the_airflow_direction\" >Does a visible fan prove the airflow direction?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.wehopower.com\/tl\/news\/something-you-should-know-about-cooling-fan\/#Can_exterior_dimensions_define_the_required_ventilation_clearance\" >Can exterior dimensions define the required ventilation clearance?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.wehopower.com\/tl\/news\/something-you-should-know-about-cooling-fan\/#Can_the_cabinet_filter_be_selected_from_the_power_supply_wattage_alone\" >Can the cabinet filter be selected from the power supply wattage alone?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Separate_component_identity_from_installation_approval\"><\/span>Separate component identity from installation approval<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The WEHO S-800-24 is an industrial automation example with a built-in fan. The manufacturer photograph marks the output +24V and 33A. Its controlled drawing identifies a 291 mm longitudinal chassis, 132 mm transverse width and 68 mm height. These are exterior dimensions; they do not define ventilation or electrical service clearance.<\/p>\n<p>The source nameplate and specification express mains information differently. Preserve each literal source in the receiving record and obtain the exact revision and selector instructions before energizing. No measured machine demand, actual input setting, delivered output capacity or tested cabinet temperature is claimed in this article.<\/p>\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/01-product-detail-29.png?quality=85&strip=all\" alt=\"Power Supply Cooling Fans: Airflow and Service Access for OEM Equipment  title=\" class=\"wp-image-18662\" loading=\"eager\" power supply cooling fans: airflow and service access for oem equipment title =\"\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/01-product-detail-29.png?quality=85&strip=all 1536w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/01-product-detail-29-300x200.png?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/01-product-detail-29-1024x683.png?quality=85&strip=all 1024w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/01-product-detail-29-768x512.png?quality=85&strip=all 768w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/01-product-detail-29-18x12.png?quality=85&strip=all 18w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Review_the_complete_airflow_path\"><\/span>Review the complete airflow path<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A power supply cooling fan must operate within the final equipment&#8217;s airflow path. Locate potential restrictions at the equipment intake, the supply grille, nearby wiring and the outlet. A filter can reduce contamination while adding pressure loss. Review that tradeoff with the equipment designer rather than assuming a larger filter or higher fan speed solves every condition.<\/p>\n<p>Identify intake and exhaust from revision-specific evidence. The source photograph shows a fan grille, but it cannot establish whether that fan draws air into or out of the chassis. Do not transfer a statement about one historical design to every WEHO supply.<\/p>\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/02-cnc-service-bay.png?quality=85&strip=all\" alt=\"Power Supply Cooling Fans: Airflow and Service Access for OEM Equipment  title=\" class=\"wp-image-18663\" power supply cooling fans: airflow and service access for oem equipment title =\"\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/02-cnc-service-bay.png?quality=85&strip=all 1536w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/02-cnc-service-bay-300x200.png?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/02-cnc-service-bay-1024x683.png?quality=85&strip=all 1024w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/02-cnc-service-bay-768x512.png?quality=85&strip=all 768w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/02-cnc-service-bay-18x12.png?quality=85&strip=all 18w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Keep_maintenance_access_practical\"><\/span>Keep maintenance access practical<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Position the chassis so qualified service staff can inspect the grille and reach documented fasteners after isolation. Route approved conductors to their identified terminals. Do not place wires into ventilation slots or treat a chassis-mounted supply as a DIN-rail product.<\/p>\n<p>The documented S-800-24 source has a fan and two DC studs at one end and a separate L\/N\/FG input block at the other. Plan cable access for both ends. Exterior size alone does not establish safe conductor bends, connector covers or cleaning access.<\/p>\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/03-packaging-machine-service-module.png?quality=85&strip=all\" alt=\"Power Supply Cooling Fans: Airflow and Service Access for OEM Equipment  title=\" class=\"wp-image-18664\" power supply cooling fans: airflow and service access for oem equipment title =\"\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/03-packaging-machine-service-module.png?quality=85&strip=all 1536w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/03-packaging-machine-service-module-300x200.png?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/03-packaging-machine-service-module-1024x683.png?quality=85&strip=all 1024w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/03-packaging-machine-service-module-768x512.png?quality=85&strip=all 768w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/03-packaging-machine-service-module-18x12.png?quality=85&strip=all 18w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Establish_an_equipment_thermal_acceptance_record\"><\/span>Establish an equipment thermal acceptance record<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Record the component revision, supply input condition, actual load profile, cabinet orientation, ambient conditions and equipment measurement points. Follow the applicable supplier limits and test the assembled equipment. A fan photograph is not a temperature test, and an unpowered integration illustration is not a completed acceptance record.<\/p>\n<p>If a power supply cooling fan changes with temperature or has a fault signal, obtain the exact control behavior for that ordered revision. Do not promise fan-lock protection, a threshold or automatic recovery without primary product evidence.<\/p>\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/04-cooling-evidence-map.png?quality=85&strip=all\" alt=\"Power Supply Cooling Fans: Airflow and Service Access for OEM Equipment  title=\" class=\"wp-image-18665\" power supply cooling fans: airflow and service access for oem equipment title =\"\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/04-cooling-evidence-map.png?quality=85&strip=all 1536w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/04-cooling-evidence-map-300x200.png?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/04-cooling-evidence-map-1024x683.png?quality=85&strip=all 1024w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/04-cooling-evidence-map-768x512.png?quality=85&strip=all 768w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/04-cooling-evidence-map-18x12.png?quality=85&strip=all 18w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Review_dust_and_service_conditions\"><\/span>Review dust and service conditions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Dust can obstruct airflow and contaminate internal parts. Define an inspection interval from actual environment and equipment requirements. Maintenance must follow the equipment&#8217;s isolation and service instructions; do not insert objects through a powered grille or open the supply to copy a catalog layout.<\/p>\n<p>Fanless supplies also require thermal review. They can reduce moving-part maintenance but do not remove convection paths, derating or equipment enclosure constraints. Compare suitable products against the same documented duty and environment rather than treating either cooling method as universally better.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"OEM_procurement_checklist\"><\/span>OEM procurement checklist<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Ask for the exact full-model and revision, dimensional drawing, fan and airflow documentation, mounting instructions, electrical connection identification and applicable environmental limits. Keep a separate record of what the supplier documents, what the receiving sample shows and what the completed equipment test proves.<\/p>\n<p>For the product-family reference, see the <a href=\"https:\/\/www.wehopower.com\/tl\/product\/s-800w-series-normal-single-switching-power-supply\/\">official WEHO S-800 series page<\/a>. Obtain the controlled drawing and installation instructions for the exact ordered revision before release.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Key_Takeaways\"><\/span>Key Takeaways<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul><li>A power supply cooling fan is one part of the equipment cooling path.<\/li><li>Preserve exact model, label, connection and revision evidence.<\/li><li>Documented exterior dimensions do not establish clearance or thermal performance.<\/li><li>Airflow direction and fan control require revision-specific evidence.<\/li><li>Validate the completed equipment under its real input, load and environment.<\/li><\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Konklusyon<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Review the power supply cooling fan together with cabinet airflow and service access. For an S-800-24 example, use the exact source drawing and visible connection identity, then complete supplier revision checks and equipment testing before releasing an energized installation.<\/p>\n<section class=\"weho-faq\" aria-labelledby=\"weho-faq-heading\">\n<h2 id=\"weho-faq-heading\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span>Frequently Asked Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<article class=\"weho-faq-item\">\n<h3><span class=\"ez-toc-section\" id=\"Does_a_visible_fan_prove_the_airflow_direction\"><\/span>Does a visible fan prove the airflow direction?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No. Obtain revision-specific airflow and fan-control evidence; a grille photograph cannot certify direction.<\/p>\n<\/article>\n<article class=\"weho-faq-item\">\n<h3><span class=\"ez-toc-section\" id=\"Can_exterior_dimensions_define_the_required_ventilation_clearance\"><\/span>Can exterior dimensions define the required ventilation clearance?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No. Exterior dimensions locate the component. Clearance and ambient limits require revision-specific installation documentation and equipment thermal verification.<\/p>\n<\/article>\n<article class=\"weho-faq-item\">\n<h3><span class=\"ez-toc-section\" id=\"Can_the_cabinet_filter_be_selected_from_the_power_supply_wattage_alone\"><\/span>Can the cabinet filter be selected from the power supply wattage alone?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No. Filter pressure drop, contamination, airflow path and maintenance access must be evaluated for the equipment configuration.<\/p>\n<\/article>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>Review power supply cooling fan access, airflow evidence, dust exposure and cabinet maintenance before releasing an OEM equipment installation.<\/p>","protected":false},"author":1,"featured_media":18662,"parent":0,"menu_order":442,"comment_status":"open","ping_status":"open","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[149],"class_list":["post-2908","news","type-news","status-publish","format-standard","has-post-thumbnail","hentry","news_category-blog","entry"],"acf":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.wehopower.com\/tl\/wp-json\/wp\/v2\/news\/2908","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wehopower.com\/tl\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/www.wehopower.com\/tl\/wp-json\/wp\/v2\/types\/news"}],"author":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/tl\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/tl\/wp-json\/wp\/v2\/comments?post=2908"}],"version-history":[{"count":1,"href":"https:\/\/www.wehopower.com\/tl\/wp-json\/wp\/v2\/news\/2908\/revisions"}],"predecessor-version":[{"id":18666,"href":"https:\/\/www.wehopower.com\/tl\/wp-json\/wp\/v2\/news\/2908\/revisions\/18666"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/tl\/wp-json\/wp\/v2\/media\/18662"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/tl\/wp-json\/wp\/v2\/media?parent=2908"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/tl\/wp-json\/wp\/v2\/news_category?post=2908"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}