{"id":10166,"date":"2002-08-26T09:47:05","date_gmt":"2002-08-26T07:47:05","guid":{"rendered":"http:\/\/wordpress.p581074.webspaceconfig.de\/2021\/10\/20\/noise-produced-by-fans\/"},"modified":"2026-07-30T15:36:51","modified_gmt":"2026-07-30T13:36:51","slug":"noise-produced-by-fans","status":"publish","type":"post","link":"https:\/\/www.sepa-europe.com\/en\/2002\/08\/26\/noise-produced-by-fans\/","title":{"rendered":"Noise optimized cooling"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"10166\" class=\"elementor elementor-10166 elementor-7330\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7ea0494 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7ea0494\" data-element_type=\"section\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[{&quot;jet_parallax_layout_image&quot;:{&quot;url&quot;:&quot;&quot;,&quot;id&quot;:&quot;&quot;,&quot;size&quot;:&quot;&quot;},&quot;_id&quot;:&quot;290b017&quot;,&quot;jet_parallax_layout_image_tablet&quot;:{&quot;url&quot;:&quot;&quot;,&quot;id&quot;:&quot;&quot;,&quot;size&quot;:&quot;&quot;},&quot;jet_parallax_layout_image_mobile&quot;:{&quot;url&quot;:&quot;&quot;,&quot;id&quot;:&quot;&quot;,&quot;size&quot;:&quot;&quot;},&quot;jet_parallax_layout_speed&quot;:{&quot;unit&quot;:&quot;%&quot;,&quot;size&quot;:50,&quot;sizes&quot;:[]},&quot;jet_parallax_layout_type&quot;:&quot;scroll&quot;,&quot;jet_parallax_layout_direction&quot;:null,&quot;jet_parallax_layout_fx_direction&quot;:null,&quot;jet_parallax_layout_z_index&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_x&quot;:50,&quot;jet_parallax_layout_bg_x_tablet&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_x_mobile&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_y&quot;:50,&quot;jet_parallax_layout_bg_y_tablet&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_y_mobile&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_size&quot;:&quot;auto&quot;,&quot;jet_parallax_layout_bg_size_tablet&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_size_mobile&quot;:&quot;&quot;,&quot;jet_parallax_layout_animation_prop&quot;:&quot;transform&quot;,&quot;jet_parallax_layout_on&quot;:[&quot;desktop&quot;,&quot;tablet&quot;]}],&quot;background_background&quot;:&quot;slideshow&quot;,&quot;background_slideshow_gallery&quot;:[{&quot;id&quot;:7181,&quot;url&quot;:&quot;https:\\\/\\\/www.sepa-europe.com\\\/wp-content\\\/uploads\\\/2021\\\/08\\\/tech-infos_BG.jpg&quot;}],&quot;background_slideshow_loop&quot;:&quot;yes&quot;,&quot;background_slideshow_slide_duration&quot;:5000,&quot;background_slideshow_slide_transition&quot;:&quot;fade&quot;,&quot;background_slideshow_transition_duration&quot;:500}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-cc855f1\" data-id=\"cc855f1\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-617b4b7 jet-breadcrumbs-page-title-yes elementor-widget elementor-widget-jet-breadcrumbs\" data-id=\"617b4b7\" data-element_type=\"widget\" data-widget_type=\"jet-breadcrumbs.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<div class=\"elementor-jet-breadcrumbs jet-blocks\">\n\t\t<div class=\"jet-breadcrumbs\">\n\t\t<div class=\"jet-breadcrumbs__content\">\n\t\t<div class=\"jet-breadcrumbs__wrap\"><div class=\"jet-breadcrumbs__item\"><a href=\"https:\/\/www.sepa-europe.com\/en\/\" class=\"jet-breadcrumbs__item-link is-home\" rel=\"home\" title=\"Expert for electronics cooling\">Expert for electronics cooling<\/a><\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div><\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-9b7a3bf elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"9b7a3bf\" data-element_type=\"section\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[{&quot;jet_parallax_layout_image&quot;:{&quot;url&quot;:&quot;&quot;,&quot;id&quot;:&quot;&quot;,&quot;size&quot;:&quot;&quot;},&quot;_id&quot;:&quot;5e5a04f&quot;,&quot;jet_parallax_layout_image_tablet&quot;:{&quot;url&quot;:&quot;&quot;,&quot;id&quot;:&quot;&quot;,&quot;size&quot;:&quot;&quot;},&quot;jet_parallax_layout_image_mobile&quot;:{&quot;url&quot;:&quot;&quot;,&quot;id&quot;:&quot;&quot;,&quot;size&quot;:&quot;&quot;},&quot;jet_parallax_layout_speed&quot;:{&quot;unit&quot;:&quot;%&quot;,&quot;size&quot;:50,&quot;sizes&quot;:[]},&quot;jet_parallax_layout_type&quot;:&quot;scroll&quot;,&quot;jet_parallax_layout_direction&quot;:null,&quot;jet_parallax_layout_fx_direction&quot;:null,&quot;jet_parallax_layout_z_index&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_x&quot;:50,&quot;jet_parallax_layout_bg_x_tablet&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_x_mobile&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_y&quot;:50,&quot;jet_parallax_layout_bg_y_tablet&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_y_mobile&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_size&quot;:&quot;auto&quot;,&quot;jet_parallax_layout_bg_size_tablet&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_size_mobile&quot;:&quot;&quot;,&quot;jet_parallax_layout_animation_prop&quot;:&quot;transform&quot;,&quot;jet_parallax_layout_on&quot;:[&quot;desktop&quot;,&quot;tablet&quot;]}]}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-e8d1f0a\" data-id=\"e8d1f0a\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;gradient&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a2a7515 elementor-widget elementor-widget-heading\" data-id=\"a2a7515\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Technical infos<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f18126c elementor-nav-menu--dropdown-tablet elementor-nav-menu__text-align-aside elementor-nav-menu--toggle elementor-nav-menu--burger elementor-widget elementor-widget-nav-menu\" data-id=\"f18126c\" data-element_type=\"widget\" data-settings=\"{&quot;layout&quot;:&quot;vertical&quot;,&quot;submenu_icon&quot;:{&quot;value&quot;:&quot;&lt;i class=\\&quot;fas fa-caret-down\\&quot;&gt;&lt;\\\/i&gt;&quot;,&quot;library&quot;:&quot;fa-solid&quot;},&quot;toggle&quot;:&quot;burger&quot;}\" data-widget_type=\"nav-menu.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t<nav class=\"elementor-nav-menu--main elementor-nav-menu__container elementor-nav-menu--layout-vertical e--pointer-none\">\n\t\t\t\t<ul id=\"menu-1-f18126c\" class=\"elementor-nav-menu sm-vertical\"><li class=\"menu-item menu-item-type-post_type menu-item-object-post menu-item-10684\"><a href=\"https:\/\/www.sepa-europe.com\/en\/2007\/08\/05\/influence-of-temperature-on-mtbf-and-service-life\/\" class=\"elementor-item\">Influence of temperature on service life of electronics<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-post menu-item-10685\"><a href=\"https:\/\/www.sepa-europe.com\/en\/2006\/08\/25\/fans-service-life-mtbf\/\" class=\"elementor-item\">Fans, Service life, MTBF<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-post menu-item-10686\"><a href=\"https:\/\/www.sepa-europe.com\/en\/2005\/08\/25\/electronic-cooling-quality-that-pays-off\/\" class=\"elementor-item\">Electronic cooling: QUALITY THAT PAYS OFF!<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-post menu-item-10687\"><a href=\"https:\/\/www.sepa-europe.com\/en\/2003\/08\/25\/what-is-behind-the-term-magfix-as-used-in-fans-by-sepa-europe\/\" class=\"elementor-item\">What is behind the term MagFix\u00ae as used in fans by SEPA EUROPE?<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-post menu-item-10688\"><a href=\"https:\/\/www.sepa-europe.com\/en\/2004\/08\/25\/influence-of-humidity-on-l10-and-mtbf\/\" class=\"elementor-item\">INFLUENCE OF HUMIDITY ON L10 AND MTBF<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-post menu-item-10689\"><a href=\"https:\/\/www.sepa-europe.com\/en\/2002\/08\/26\/noise-produced-by-fans\/\" class=\"elementor-item\">Noise optimized cooling<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-post menu-item-10690\"><a href=\"https:\/\/www.sepa-europe.com\/en\/2001\/08\/26\/moisture-protection-ip-protection\/\" class=\"elementor-item\">IP protection \/ Moisture protection<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-post menu-item-10691\"><a href=\"https:\/\/www.sepa-europe.com\/en\/2000\/08\/26\/no-chance-for-hot-spots\/\" class=\"elementor-item\">No chance for hot spots!<\/a><\/li>\n<\/ul>\t\t\t<\/nav>\n\t\t\t\t\t<div class=\"elementor-menu-toggle\" role=\"button\" tabindex=\"0\" aria-label=\"Menu Toggle\" aria-expanded=\"false\">\n\t\t\t<i aria-hidden=\"true\" role=\"presentation\" class=\"elementor-menu-toggle__icon--open eicon-menu-bar\"><\/i><i aria-hidden=\"true\" role=\"presentation\" class=\"elementor-menu-toggle__icon--close eicon-close\"><\/i>\t\t\t<span class=\"elementor-screen-only\">Menu<\/span>\n\t\t<\/div>\n\t\t\t\t\t<nav class=\"elementor-nav-menu--dropdown elementor-nav-menu__container\" aria-hidden=\"true\">\n\t\t\t\t<ul id=\"menu-2-f18126c\" class=\"elementor-nav-menu sm-vertical\"><li class=\"menu-item menu-item-type-post_type menu-item-object-post menu-item-10684\"><a href=\"https:\/\/www.sepa-europe.com\/en\/2007\/08\/05\/influence-of-temperature-on-mtbf-and-service-life\/\" class=\"elementor-item\" tabindex=\"-1\">Influence of temperature on service life of electronics<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-post menu-item-10685\"><a href=\"https:\/\/www.sepa-europe.com\/en\/2006\/08\/25\/fans-service-life-mtbf\/\" class=\"elementor-item\" tabindex=\"-1\">Fans, Service life, MTBF<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-post menu-item-10686\"><a href=\"https:\/\/www.sepa-europe.com\/en\/2005\/08\/25\/electronic-cooling-quality-that-pays-off\/\" class=\"elementor-item\" tabindex=\"-1\">Electronic cooling: QUALITY THAT PAYS OFF!<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-post menu-item-10687\"><a href=\"https:\/\/www.sepa-europe.com\/en\/2003\/08\/25\/what-is-behind-the-term-magfix-as-used-in-fans-by-sepa-europe\/\" class=\"elementor-item\" tabindex=\"-1\">What is behind the term MagFix\u00ae as used in fans by SEPA EUROPE?<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-post menu-item-10688\"><a href=\"https:\/\/www.sepa-europe.com\/en\/2004\/08\/25\/influence-of-humidity-on-l10-and-mtbf\/\" class=\"elementor-item\" tabindex=\"-1\">INFLUENCE OF HUMIDITY ON L10 AND MTBF<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-post menu-item-10689\"><a href=\"https:\/\/www.sepa-europe.com\/en\/2002\/08\/26\/noise-produced-by-fans\/\" class=\"elementor-item\" tabindex=\"-1\">Noise optimized cooling<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-post menu-item-10690\"><a href=\"https:\/\/www.sepa-europe.com\/en\/2001\/08\/26\/moisture-protection-ip-protection\/\" class=\"elementor-item\" tabindex=\"-1\">IP protection \/ Moisture protection<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-post menu-item-10691\"><a href=\"https:\/\/www.sepa-europe.com\/en\/2000\/08\/26\/no-chance-for-hot-spots\/\" class=\"elementor-item\" tabindex=\"-1\">No chance for hot spots!<\/a><\/li>\n<\/ul>\t\t\t<\/nav>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-top-column elementor-element elementor-element-c847a48\" data-id=\"c847a48\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9fa7fde elementor-widget elementor-widget-image\" data-id=\"9fa7fde\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"341\" src=\"https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_comp_geraeusch_01b-1024x341.jpg\" class=\"attachment-large size-large wp-image-9801\" alt=\"\" srcset=\"https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_comp_geraeusch_01b-1024x341.jpg 1024w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_comp_geraeusch_01b-300x100.jpg 300w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_comp_geraeusch_01b-768x256.jpg 768w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_comp_geraeusch_01b-600x200.jpg 600w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_comp_geraeusch_01b.jpg 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a02f701 elementor-widget elementor-widget-heading\" data-id=\"a02f701\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Noise optimized active cooling is becoming increasingly significant<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5969db1 elementor-widget elementor-widget-text-editor\" data-id=\"5969db1\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p class=\"isSelectedEnd\">The specified noise level of a fan, like its expected service life, requires further explanation. Noise is measured under standardized conditions in an acoustic test chamber. For this purpose, the fan is suspended on rubber cords, and the noise level is measured at a defined distance from the fan hub on the air intake side. The relevant standard is ISO 7779, which specifies a measuring distance of 1 metre. However, small fans generate so little noise that it is preferable to take the measurement at a distance of 0.1 metres and then reduce the measured value by 20 dB.<\/p>\n<p class=\"isSelectedEnd\">The results provide useful guidance, but they do not represent the actual noise generated when the fan is installed in a specific application. Important factors such as the mounting method, housing design, housing material, back pressure and unfavourable airflow conditions are not taken into account during the measurement. However, these factors can have a significant effect on the fan noise in the respective application.\u00a0Selecting the right fan and installing it correctly depends on several factors and should therefore always be carried out in consultation with our experienced fan specialists.<\/p>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6e7d459 elementor-widget elementor-widget-heading\" data-id=\"6e7d459\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Measures required to reduce noise<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5505c5b elementor-widget elementor-widget-text-editor\" data-id=\"5505c5b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Measures required to reduce noise depend on the actual application and as far as design is concerned, should already be taken during the development phase. As subsequent changes are usually expensive and less effective, the following points should be observed:<\/p>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-869c7fe elementor-widget elementor-widget-heading\" data-id=\"869c7fe\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Elastic fan sleeves <\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-600bf7b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"600bf7b\" data-element_type=\"section\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-f61dc9f\" data-id=\"f61dc9f\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ae4e417 elementor-widget elementor-widget-text-editor\" data-id=\"ae4e417\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Use adequately dimensioned mounting aids for reducing structure-borne noise, e.g.<br \/>\ncollars. The fastening devices for elastic securing <a href=\"https:\/\/www.sepa-europe.com\/en\/accessories\/\"><span style=\"text-decoration: underline;\"><strong>LM<\/strong><\/span><\/a> or <a href=\"https:\/\/www.sepa-europe.com\/en\/accessories\/\"><span style=\"text-decoration: underline;\"><strong>SLM<\/strong><\/span><\/a> are available for fan sizes of 30 mm x 30 mm to 120 mm x 120 mm. They enable the quick installation on mounting plates or housings so that the noise can be reduced by up to 9dB.<\/p>\n<p>The values are intended as a general guide only and do not represent the actual noise level when the fan is installed in the respective application. Important factors such as the mounting method, enclosure design, enclosure material, back pressure and unfavourable airflow conditions are not taken into account during the measurement. However, these factors can have a significant impact on the fan noise generated in the specific application.<\/p>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-bebb954\" data-id=\"bebb954\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d69b3c5 elementor-widget elementor-widget-image\" data-id=\"d69b3c5\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"902\" height=\"682\" src=\"https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/manschette.jpg\" class=\"attachment-large size-large wp-image-9803\" alt=\"\" srcset=\"https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/manschette.jpg 902w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/manschette-300x227.jpg 300w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/manschette-768x581.jpg 768w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/manschette-600x454.jpg 600w\" sizes=\"(max-width: 902px) 100vw, 902px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-8ac45f8 elementor-widget elementor-widget-heading\" data-id=\"8ac45f8\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Mounting that reduces noise<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-7a96479 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7a96479\" data-element_type=\"section\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-df167cf\" data-id=\"df167cf\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7c93f55 elementor-widget elementor-widget-text-editor\" data-id=\"7c93f55\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Simple and affordable mounting that reduces noise can be achieved by using cable bushings and not mounting the fixing screws directly on the housing wall:<\/p>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-0df8783\" data-id=\"0df8783\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d60bd42 elementor-widget elementor-widget-image\" data-id=\"d60bd42\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"768\" height=\"421\" src=\"https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_leise_luefter_montage_quiet_fans.jpg\" class=\"attachment-large size-large wp-image-9804\" alt=\"\" srcset=\"https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_leise_luefter_montage_quiet_fans.jpg 768w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_leise_luefter_montage_quiet_fans-300x164.jpg 300w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_leise_luefter_montage_quiet_fans-600x329.jpg 600w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-dd26db2 elementor-widget elementor-widget-heading\" data-id=\"dd26db2\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Reducing speed<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-5d05b15 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5d05b15\" data-element_type=\"section\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[{&quot;jet_parallax_layout_image&quot;:{&quot;url&quot;:&quot;&quot;,&quot;id&quot;:&quot;&quot;,&quot;size&quot;:&quot;&quot;},&quot;_id&quot;:&quot;381143e&quot;,&quot;jet_parallax_layout_image_tablet&quot;:{&quot;url&quot;:&quot;&quot;,&quot;id&quot;:&quot;&quot;,&quot;size&quot;:&quot;&quot;},&quot;jet_parallax_layout_image_mobile&quot;:{&quot;url&quot;:&quot;&quot;,&quot;id&quot;:&quot;&quot;,&quot;size&quot;:&quot;&quot;},&quot;jet_parallax_layout_speed&quot;:{&quot;unit&quot;:&quot;%&quot;,&quot;size&quot;:50,&quot;sizes&quot;:[]},&quot;jet_parallax_layout_type&quot;:&quot;scroll&quot;,&quot;jet_parallax_layout_direction&quot;:null,&quot;jet_parallax_layout_fx_direction&quot;:null,&quot;jet_parallax_layout_z_index&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_x&quot;:50,&quot;jet_parallax_layout_bg_x_tablet&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_x_mobile&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_y&quot;:50,&quot;jet_parallax_layout_bg_y_tablet&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_y_mobile&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_size&quot;:&quot;auto&quot;,&quot;jet_parallax_layout_bg_size_tablet&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_size_mobile&quot;:&quot;&quot;,&quot;jet_parallax_layout_animation_prop&quot;:&quot;transform&quot;,&quot;jet_parallax_layout_on&quot;:[&quot;desktop&quot;,&quot;tablet&quot;]}]}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-f95db59\" data-id=\"f95db59\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2ac4100 elementor-widget elementor-widget-spacer\" data-id=\"2ac4100\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-05d27bf elementor-widget elementor-widget-text-editor\" data-id=\"05d27bf\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ol>\n<li>Choose fans with the largest possible dimensions and the lowest speed that is necessary for cooling. Two fans with the same flow rate can develop up to 12dB less noise than one single fan with a higher speed! Unpleasant, \u201esharp\u201c high-frequency sound ranges are<br \/>\nreduced more than low and medium frequencies.<\/li>\n<li>Use PWM (pulse-width modulation) to control the fan. A fan is loudest when it is spinning at high speed. The higher the speed, the greater the air turbulence and the more noise it produces. PWM allows the electronics to adjust the fan speed precisely to the actual cooling requirements. When the system is cool, the fan runs quietly at a low speed. As the temperature rises, it only speeds up as much as necessary. This means that, most of the time, it operates significantly more quietly than a fan that always runs at full power.<\/li>\n<\/ol>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-233c2bc elementor-widget elementor-widget-image\" data-id=\"233c2bc\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"577\" src=\"https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_leise_luefter_quiet_fans_frequenz.jpg\" class=\"attachment-large size-large wp-image-9805\" alt=\"\" srcset=\"https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_leise_luefter_quiet_fans_frequenz.jpg 1024w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_leise_luefter_quiet_fans_frequenz-300x169.jpg 300w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_leise_luefter_quiet_fans_frequenz-768x433.jpg 768w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_leise_luefter_quiet_fans_frequenz-150x85.jpg 150w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_leise_luefter_quiet_fans_frequenz-600x338.jpg 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c8568c9 elementor-widget elementor-widget-heading\" data-id=\"c8568c9\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Optimum operating range<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2c41999 elementor-widget elementor-widget-text-editor\" data-id=\"2c41999\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Ensure that you operate the fans in the optimum operating range and the intake and discharge ports in the device are generously dimensioned as outside the operating range (too high pressure) the emitted airborne noise rises sharply.<\/p>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f9f0deb elementor-widget elementor-widget-heading\" data-id=\"f9f0deb\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Correct positioning<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a9eeb21 elementor-widget elementor-widget-text-editor\" data-id=\"a9eeb21\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>The emitted noise also depends on the fan\u2019s position and airflow direction. Please refer to the following illustration:<\/p>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3b15a0f elementor-widget elementor-widget-image\" data-id=\"3b15a0f\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"674\" height=\"568\" src=\"https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_leise_luefter_quiet_fans_grafik.jpg\" class=\"attachment-large size-large wp-image-9806\" alt=\"\" srcset=\"https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_leise_luefter_quiet_fans_grafik.jpg 674w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_leise_luefter_quiet_fans_grafik-300x253.jpg 300w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2021\/08\/sepa_europe_leise_luefter_quiet_fans_grafik-600x506.jpg 600w\" sizes=\"(max-width: 674px) 100vw, 674px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a288636 elementor-widget elementor-widget-heading\" data-id=\"a288636\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Advantage sleeve bearing<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-619c6fd elementor-widget elementor-widget-text-editor\" data-id=\"619c6fd\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Choose sleeve bearing fans with extremely low speed as they develop less structure-borne sound than fans with ball bearings. The MagFix\u00ae technology of\u00a0<strong><em>SEPA\u00a0<\/em>EUROPE\u00a0<\/strong>reliably prevents the disadvantages of the older versions of sleeve bearing fans and can be operated in every installation position. Axial and radial fans by\u00a0<strong><em>SEPA\u00a0<\/em>EUROPE\u00a0<\/strong>with modern blade shape develop considerably less noise with the same flow rate.<\/p>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b489864 elementor-widget elementor-widget-image\" data-id=\"b489864\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"673\" src=\"https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2003\/08\/Lagersystem-mit-MagFix-NEU-Web-1-1024x673.jpg\" class=\"attachment-large size-large wp-image-30092\" alt=\"Magfix SEPA EUROPE\" srcset=\"https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2003\/08\/Lagersystem-mit-MagFix-NEU-Web-1-1024x673.jpg 1024w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2003\/08\/Lagersystem-mit-MagFix-NEU-Web-1-300x197.jpg 300w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2003\/08\/Lagersystem-mit-MagFix-NEU-Web-1-768x504.jpg 768w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2003\/08\/Lagersystem-mit-MagFix-NEU-Web-1-600x394.jpg 600w, https:\/\/www.sepa-europe.com\/wp-content\/uploads\/2003\/08\/Lagersystem-mit-MagFix-NEU-Web-1.jpg 1209w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-46dc718 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"46dc718\" data-element_type=\"section\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[{&quot;jet_parallax_layout_image&quot;:{&quot;url&quot;:&quot;&quot;,&quot;id&quot;:&quot;&quot;,&quot;size&quot;:&quot;&quot;},&quot;_id&quot;:&quot;87a1ba7&quot;,&quot;jet_parallax_layout_image_tablet&quot;:{&quot;url&quot;:&quot;&quot;,&quot;id&quot;:&quot;&quot;,&quot;size&quot;:&quot;&quot;},&quot;jet_parallax_layout_image_mobile&quot;:{&quot;url&quot;:&quot;&quot;,&quot;id&quot;:&quot;&quot;,&quot;size&quot;:&quot;&quot;},&quot;jet_parallax_layout_speed&quot;:{&quot;unit&quot;:&quot;%&quot;,&quot;size&quot;:50,&quot;sizes&quot;:[]},&quot;jet_parallax_layout_type&quot;:&quot;scroll&quot;,&quot;jet_parallax_layout_direction&quot;:null,&quot;jet_parallax_layout_fx_direction&quot;:null,&quot;jet_parallax_layout_z_index&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_x&quot;:50,&quot;jet_parallax_layout_bg_x_tablet&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_x_mobile&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_y&quot;:50,&quot;jet_parallax_layout_bg_y_tablet&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_y_mobile&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_size&quot;:&quot;auto&quot;,&quot;jet_parallax_layout_bg_size_tablet&quot;:&quot;&quot;,&quot;jet_parallax_layout_bg_size_mobile&quot;:&quot;&quot;,&quot;jet_parallax_layout_animation_prop&quot;:&quot;transform&quot;,&quot;jet_parallax_layout_on&quot;:[&quot;desktop&quot;,&quot;tablet&quot;]}]}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-6a11af1\" data-id=\"6a11af1\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-648b7ff elementor-align-center elementor-widget elementor-widget-button\" data-id=\"648b7ff\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/www.sepa-europe.com\/en\/2022\/11\/03\/quiet-fans\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Quite fans by SEPA EUROPE<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Noise optimized active cooling is becoming increasingly significant. <\/p>\n","protected":false},"author":1,"featured_media":9807,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"footnotes":""},"categories":[152],"tags":[264],"_links":{"self":[{"href":"https:\/\/www.sepa-europe.com\/en\/wp-json\/wp\/v2\/posts\/10166"}],"collection":[{"href":"https:\/\/www.sepa-europe.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sepa-europe.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sepa-europe.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sepa-europe.com\/en\/wp-json\/wp\/v2\/comments?post=10166"}],"version-history":[{"count":42,"href":"https:\/\/www.sepa-europe.com\/en\/wp-json\/wp\/v2\/posts\/10166\/revisions"}],"predecessor-version":[{"id":47961,"href":"https:\/\/www.sepa-europe.com\/en\/wp-json\/wp\/v2\/posts\/10166\/revisions\/47961"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sepa-europe.com\/en\/wp-json\/wp\/v2\/media\/9807"}],"wp:attachment":[{"href":"https:\/\/www.sepa-europe.com\/en\/wp-json\/wp\/v2\/media?parent=10166"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sepa-europe.com\/en\/wp-json\/wp\/v2\/categories?post=10166"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sepa-europe.com\/en\/wp-json\/wp\/v2\/tags?post=10166"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}