{"id":302850,"date":"2017-07-26T12:18:23","date_gmt":"2017-07-26T12:18:23","guid":{"rendered":"https:\/\/leedpoints.com\/?guid=bb874609e186c49721206687b836c130"},"modified":"2017-07-26T12:18:23","modified_gmt":"2017-07-26T12:18:23","slug":"using-total-effective-length-in-duct-design-2","status":"publish","type":"post","link":"https:\/\/leedpoints.com\/green-building-blog\/using-total-effective-length-in-duct-design-2\/","title":{"rendered":"Using Total Effective Length in Duct Design"},"content":{"rendered":null,"protected":false},"excerpt":{"rendered":"<div>\n<div>Prime:&nbsp;<\/div>\n<div>\n<div>\n                     prime        <\/div>\n<\/p><\/div>\n<\/div>\n<div>\n<div>Subtitle:&nbsp;<\/div>\n<div>\n<div>\n                    For air flow purposes, a duct system is often much longer than it appears        <\/div>\n<\/p><\/div>\n<\/div>\n<div>\n<div>Images:&nbsp;<\/div>\n<div>\n<div>\n                    <a href=\"http:\/\/www.greenbuildingadvisor.com\/articles\/dept\/building-science\/using-total-effective-length-duct-design\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.greenbuildingadvisor.com\/sites\/default\/files\/imagecache\/blog-river\/hvac-design-beautiful-duct-system-air-flow.jpg\" alt=\"\" title=\"Well designed duct system\" width=\"144\" height=\"82\"><\/a>        <\/div>\n<div>\n                    <a href=\"http:\/\/www.greenbuildingadvisor.com\/articles\/dept\/building-science\/using-total-effective-length-duct-design\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.greenbuildingadvisor.com\/sites\/default\/files\/imagecache\/blog-river\/duct-design-layout-vents-air-flow-equivalent-length.png\" alt=\"\" title=\"Duct layout\" width=\"144\" height=\"116\"><\/a>        <\/div>\n<div>\n                    <a href=\"http:\/\/www.greenbuildingadvisor.com\/articles\/dept\/building-science\/using-total-effective-length-duct-design\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.greenbuildingadvisor.com\/sites\/default\/files\/imagecache\/blog-river\/duct-system-fittings-elbows-equivalent-length_0.png\" alt=\"\" title=\"Elbow equivalent length table\" width=\"144\" height=\"38\"><\/a>        <\/div>\n<div>\n                    <a href=\"http:\/\/www.greenbuildingadvisor.com\/articles\/dept\/building-science\/using-total-effective-length-duct-design\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.greenbuildingadvisor.com\/sites\/default\/files\/imagecache\/blog-river\/static-pressure-equivalent-effective-length-duct-design.png\" alt=\"\" title=\"Total effective length calculation\" width=\"144\" height=\"69\"><\/a>        <\/div>\n<\/p><\/div>\n<\/div>\n<p>Today I&rsquo;m going to explain an important concept in one of the most popular ways of doing duct design. I&rsquo;ve been writing a series on duct design over at my blog and began with a look at the <a href=\"http:\/\/www.energyvanguard.com\/blog\/basic-principles-duct-design\">basic physics of air moving through ducts<\/a>. The short version is that friction and turbulence in ducts results in pressure drops. Then in part 2 I covered <a href=\"http:\/\/www.energyvanguard.com\/blog\/duct-design-2-available-static-pressure\">available static pressure<\/a>. The blower gives us a pressure rise.<\/p>\n<p><a href=\"http:\/\/www.greenbuildingadvisor.com\/articles\/dept\/building-science\/using-total-effective-length-duct-design\" target=\"_blank\">read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[14573,14574,10290,14575],"class_list":["post-302850","post","type-post","status-publish","format-standard","hentry","category-green-building-posts","tag-duct-design","tag-equivalent-length","tag-hvac-design","tag-total-effective-length"],"_links":{"self":[{"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/posts\/302850","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/comments?post=302850"}],"version-history":[{"count":0,"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/posts\/302850\/revisions"}],"wp:attachment":[{"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/media?parent=302850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/categories?post=302850"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/tags?post=302850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}