{"id":87,"date":"2021-02-13T17:20:21","date_gmt":"2021-02-13T22:20:21","guid":{"rendered":"https:\/\/opentextbc.ca\/basichvac\/chapter\/centrifugal-fan\/"},"modified":"2023-03-02T11:43:02","modified_gmt":"2023-03-02T16:43:02","slug":"centrifugal-fan","status":"publish","type":"chapter","link":"https:\/\/opentextbc.ca\/basichvac\/chapter\/centrifugal-fan\/","title":{"raw":"Centrifugal Fan","rendered":"Centrifugal Fan"},"content":{"raw":"Click play on the following audio player to listen along as you read this section.\r\n\r\nhttps:\/\/media.bccampus.ca\/id\/0_p2ca4yjp?width=608&amp;height=80&amp;playerId=23449753\r\n\r\nCentrifugal fans are better suited to push larger volumes of air through ducting systems. They are designed to produce higher pressure for a given volume of air than an <strong>[pb_glossary id=\"160\"]axial fan[\/pb_glossary]<\/strong> of the same horsepower rating. Any fan used to drive air throughout the system must produce enough <strong>[pb_glossary id=\"214\"]total pressure[\/pb_glossary]<\/strong> to overcome the <strong>[pb_glossary id=\"212\"]static pressure[\/pb_glossary]<\/strong> of the ducting system and drive air everywhere it is needed.\r\n\r\n[caption id=\"attachment_86\" align=\"aligncenter\" width=\"461\"]<img class=\"wp-image-86 size-full\" src=\"https:\/\/opentextbc.ca\/accessibilitytoolkit\/wp-content\/uploads\/sites\/336\/2021\/02\/Centrifugal-fan-basic.png\" alt=\"A centrifugal fan has the direction of air flow perpendicular to the air intake.\" width=\"461\" height=\"377\" \/> Centrifugal fan[\/caption]\r\n\r\nDrawing the intake air at 90 degrees relative to the outtake, the fan blades direct the air in an spinning, circular direction, accelerating it towards the exhaust vent.\r\n\r\nDepending upon the application, the drive mechanism of the fan may be directly coupled, belt driven, or powered by a variable speed drive.\r\n\r\n<strong>[pb_glossary id=\"161\"]Centrifugal fans[\/pb_glossary]<\/strong> are noisier than an axial fan of equivalent horsepower, and so are often installed in areas where high noise levels are acceptable or noise dampening components can be installed.\r\n\r\nCentrifugal fans can move large quantities of air, while overcoming all the resistive static pressure of the duct-work system.","rendered":"<p>Click play on the following audio player to listen along as you read this section.<\/p>\n<p><iframe loading=\"lazy\" id=\"kaltura_player\" title=\"3.25 Centrifugal Fan\" src=\"https:\/\/api.ca.kaltura.com\/p\/148\/sp\/14800\/embedIframeJs\/uiconf_id\/23449753\/partner_id\/148?iframeembed=true&#38;playerId=kaltura_player&#38;entry_id=0_p2ca4yjp&#38;flashvars[leadWithHTML5]=true&#38;flashvars[streamerType]=auto&#38;flashvars[localizationCode]=en&#38;flashvars[sideBarContainer.plugin]=true&#38;flashvars[sideBarContainer.position]=left&#38;flashvars[sideBarContainer.clickToClose]=true&#38;flashvars[chapters.plugin]=true&#38;flashvars[chapters.layout]=vertical&#38;flashvars[chapters.thumbnailRotator]=false&#38;flashvars[streamSelector.plugin]=true&#38;flashvars[EmbedPlayer.SpinnerTarget]=videoHolder&#38;flashvars[dualScreen.plugin]=true&#38;flashvars[Kaltura.addCrossoriginToIframe]=true&#38;wid=0_ytl2lbro\" width=\"608\" height=\"80\" allowfullscreen=\"allowfullscreen\" sandbox=\"allow-downloads allow-forms allow-same-origin allow-scripts allow-top-navigation allow-pointer-lock allow-popups allow-modals allow-orientation-lock allow-popups-to-escape-sandbox allow-presentation allow-top-navigation-by-user-activation\" frameborder=\"0\"><\/iframe><\/p>\n<p>Centrifugal fans are better suited to push larger volumes of air through ducting systems. They are designed to produce higher pressure for a given volume of air than an <strong><a class=\"glossary-term\" aria-haspopup=\"dialog\" aria-describedby=\"definition\" href=\"#term_87_160\">axial fan<\/a><\/strong> of the same horsepower rating. Any fan used to drive air throughout the system must produce enough <strong><a class=\"glossary-term\" aria-haspopup=\"dialog\" aria-describedby=\"definition\" href=\"#term_87_214\">total pressure<\/a><\/strong> to overcome the <strong><a class=\"glossary-term\" aria-haspopup=\"dialog\" aria-describedby=\"definition\" href=\"#term_87_212\">static pressure<\/a><\/strong> of the ducting system and drive air everywhere it is needed.<\/p>\n<figure id=\"attachment_86\" aria-describedby=\"caption-attachment-86\" style=\"width: 461px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-86 size-full\" src=\"https:\/\/opentextbc.ca\/accessibilitytoolkit\/wp-content\/uploads\/sites\/336\/2021\/02\/Centrifugal-fan-basic.png\" alt=\"A centrifugal fan has the direction of air flow perpendicular to the air intake.\" width=\"461\" height=\"377\" srcset=\"https:\/\/opentextbc.ca\/basichvac\/wp-content\/uploads\/sites\/336\/2021\/02\/Centrifugal-fan-basic.png 461w, https:\/\/opentextbc.ca\/basichvac\/wp-content\/uploads\/sites\/336\/2021\/02\/Centrifugal-fan-basic-300x245.png 300w, https:\/\/opentextbc.ca\/basichvac\/wp-content\/uploads\/sites\/336\/2021\/02\/Centrifugal-fan-basic-65x53.png 65w, https:\/\/opentextbc.ca\/basichvac\/wp-content\/uploads\/sites\/336\/2021\/02\/Centrifugal-fan-basic-225x184.png 225w, https:\/\/opentextbc.ca\/basichvac\/wp-content\/uploads\/sites\/336\/2021\/02\/Centrifugal-fan-basic-350x286.png 350w\" sizes=\"auto, (max-width: 461px) 100vw, 461px\" \/><figcaption id=\"caption-attachment-86\" class=\"wp-caption-text\">Centrifugal fan<\/figcaption><\/figure>\n<p>Drawing the intake air at 90 degrees relative to the outtake, the fan blades direct the air in an spinning, circular direction, accelerating it towards the exhaust vent.<\/p>\n<p>Depending upon the application, the drive mechanism of the fan may be directly coupled, belt driven, or powered by a variable speed drive.<\/p>\n<p><strong><a class=\"glossary-term\" aria-haspopup=\"dialog\" aria-describedby=\"definition\" href=\"#term_87_161\">Centrifugal fans<\/a><\/strong> are noisier than an axial fan of equivalent horsepower, and so are often installed in areas where high noise levels are acceptable or noise dampening components can be installed.<\/p>\n<p>Centrifugal fans can move large quantities of air, while overcoming all the resistive static pressure of the duct-work system.<\/p>\n<div class=\"glossary\"><span class=\"screen-reader-text\" id=\"definition\">definition<\/span><template id=\"term_87_160\"><div class=\"glossary__definition\" role=\"dialog\" data-id=\"term_87_160\"><div tabindex=\"-1\"><p>Axial fans drive low volumes of air under low static pressure conditions in parallel with their axis of rotation. Mainly used for cooling of coils.<\/p>\n<\/div><button><span aria-hidden=\"true\">&times;<\/span><span class=\"screen-reader-text\">Close definition<\/span><\/button><\/div><\/template><template id=\"term_87_214\"><div class=\"glossary__definition\" role=\"dialog\" data-id=\"term_87_214\"><div tabindex=\"-1\"><p>The sum of static and velocity pressure that must be overcome by an air handling unit.<\/p>\n<\/div><button><span aria-hidden=\"true\">&times;<\/span><span class=\"screen-reader-text\">Close definition<\/span><\/button><\/div><\/template><template id=\"term_87_212\"><div class=\"glossary__definition\" role=\"dialog\" data-id=\"term_87_212\"><div tabindex=\"-1\"><p>The force resisting the movement of air.<\/p>\n<\/div><button><span aria-hidden=\"true\">&times;<\/span><span class=\"screen-reader-text\">Close definition<\/span><\/button><\/div><\/template><template id=\"term_87_161\"><div class=\"glossary__definition\" role=\"dialog\" data-id=\"term_87_161\"><div tabindex=\"-1\"><p>A centrifugal fan drives lager volumes of air under high static pressure conditions at a right angle to its axis of rotation. Mainly used for the moving air through ductwork.<\/p>\n<\/div><button><span aria-hidden=\"true\">&times;<\/span><span class=\"screen-reader-text\">Close definition<\/span><\/button><\/div><\/template><\/div>","protected":false},"author":90,"menu_order":4,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-87","chapter","type-chapter","status-publish","hentry"],"part":78,"_links":{"self":[{"href":"https:\/\/opentextbc.ca\/basichvac\/wp-json\/pressbooks\/v2\/chapters\/87","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/opentextbc.ca\/basichvac\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/opentextbc.ca\/basichvac\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/opentextbc.ca\/basichvac\/wp-json\/wp\/v2\/users\/90"}],"version-history":[{"count":3,"href":"https:\/\/opentextbc.ca\/basichvac\/wp-json\/pressbooks\/v2\/chapters\/87\/revisions"}],"predecessor-version":[{"id":351,"href":"https:\/\/opentextbc.ca\/basichvac\/wp-json\/pressbooks\/v2\/chapters\/87\/revisions\/351"}],"part":[{"href":"https:\/\/opentextbc.ca\/basichvac\/wp-json\/pressbooks\/v2\/parts\/78"}],"metadata":[{"href":"https:\/\/opentextbc.ca\/basichvac\/wp-json\/pressbooks\/v2\/chapters\/87\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/opentextbc.ca\/basichvac\/wp-json\/wp\/v2\/media?parent=87"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/opentextbc.ca\/basichvac\/wp-json\/pressbooks\/v2\/chapter-type?post=87"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/opentextbc.ca\/basichvac\/wp-json\/wp\/v2\/contributor?post=87"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/opentextbc.ca\/basichvac\/wp-json\/wp\/v2\/license?post=87"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}