{"id":44439,"date":"2014-10-01T08:42:23","date_gmt":"2014-10-01T08:42:23","guid":{"rendered":"http:\/\/leedpoints.com\/?guid=fcc44ce5661533933c6e1aa10616d893"},"modified":"2014-10-01T08:42:23","modified_gmt":"2014-10-01T08:42:23","slug":"the-difference-between-efficiency-and-efficacy","status":"publish","type":"post","link":"https:\/\/leedpoints.com\/green-building-blog\/the-difference-between-efficiency-and-efficacy\/","title":{"rendered":"The Difference Between Efficiency and Efficacy"},"content":{"rendered":null,"protected":false},"excerpt":{"rendered":"<div>\n<div>Subtitle:&nbsp;<\/div>\n<div>\n<div>\n                    Here&#8217;s the reason that the term &lsquo;efficacy&rsquo; pops up frequently in the field of energy efficiency        <\/div>\n<\/p><\/div>\n<\/div>\n<div>\n<div>Images:&nbsp;<\/div>\n<div>\n<div>\n                    <a href=\"http:\/\/www.greenbuildingadvisor.com\/blogs\/dept\/building-science\/difference-between-efficiency-and-efficacy\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.greenbuildingadvisor.com\/sites\/default\/files\/imagecache\/blog-river\/Ceiling%20fan%20-%20Stock%20xchnge.jpg\" alt=\"\" title=\"Photo of a ceiling fan\" width=\"144\" height=\"106\"><\/a>        <\/div>\n<\/p><\/div>\n<\/div>\n<p>When I was doing research for an <a href=\"http:\/\/www.greenbuildingadvisor.com\/blogs\/dept\/building-science\/how-buy-energy-efficient-ceiling-fan\">article on ceiling fans<\/a> a while back, I noticed that fans don&#8217;t have energy efficiency ratings; they have <em>efficacy<\/em> ratings.<\/p>\n<p>There&#8217;s certainly confusion about the terminology among different sources, but since light bulbs are also described by their efficacy, I started wondering about the term. I&#8217;d just accepted it before, with a vague understanding that there was something different about how efficacy was defined. Now I know why.<\/p>\n<p><a href=\"http:\/\/www.greenbuildingadvisor.com\/blogs\/dept\/building-science\/difference-between-efficiency-and-efficacy\" 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":[12653,6525,128,2782],"class_list":["post-44439","post","type-post","status-publish","format-standard","hentry","category-green-building-posts","tag-ceiling-fan","tag-efficacy","tag-energy-efficiency","tag-light-bulb"],"_links":{"self":[{"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/posts\/44439","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=44439"}],"version-history":[{"count":0,"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/posts\/44439\/revisions"}],"wp:attachment":[{"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/media?parent=44439"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/categories?post=44439"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/tags?post=44439"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}