{"id":160,"date":"2012-04-26T18:18:43","date_gmt":"2012-04-26T18:18:43","guid":{"rendered":"https:\/\/www.glenarmbuilding.com\/site\/old-site\/site\/?p=160"},"modified":"2016-11-18T08:15:02","modified_gmt":"2016-11-18T13:15:02","slug":"how-to-how-does-low-e-work","status":"publish","type":"post","link":"https:\/\/www.glenarmbuilding.com\/site\/news\/2012\/04\/how-to-how-does-low-e-work\/","title":{"rendered":"How To: How does Low E Work"},"content":{"rendered":"<p>Courtesy of <a href=\"http:\/\/http:\/\/www.arkema-inc.com\/functional-additives\/certincoat-flat-glass-coatings\/what-is-low-e-glass#Function\">Certincoat<\/a><\/p>\n<p><strong><a name=\"Function\"><\/a><strong>Low E &#8211; How does it work?<br \/><\/strong><br \/><\/strong>Low E glass coatings work by reflecting or absorbing IR light (heat energy). The thickness of the Low E coating and the position in the window (#2 or #3 surface) dictate how the window will perform.<\/p>\n<ul>\n<li>When installed on the #3 surface of an insulated glass unit (IG), the Low E coating will reflect IR heat from inside the room to help reduce the energy loss during the cold months, thereby reducing heating costs. <a>View flash demo<\/a><\/li>\n<li>When installed on the #2 surface of an IG unit, the Low E coating will reflect or absorb IR heat from the outside, thereby reducing solar gain and cooling costs during the warm months. <a>View flash demo<\/a><\/li>\n<\/ul>\n<p><!--more--><\/p>\n<p><strong><a name=\"Terminology\"><\/a><strong>Low E Terminnology.<\/strong><\/strong> With Low E, solar selective Low E, hard-coat, soft-coat, sputtered, and pyrolytic terminology to deal with, you need the facts on Low E.<\/p>\n<p>&nbsp;<\/p>\n<table width=\"100%\" cellspacing=\"1\" cellpadding=\"2\" align=\"left\">\n<tbody>\n<tr>\n<td bgcolor=\"#e5e5e5\"><strong>CVD<\/strong><\/td>\n<td bgcolor=\"#e5e5e5\">CVD, or <strong>C<\/strong>hemical <strong>V<\/strong>apor <strong>D<\/strong>eposition, is one of two main technologies used to manufacture Low Emissivity glass. In the CVD process, vapor directed to the hot glass surface reacts to form a ceramic coating. The resulting Low E product is often referred to as &#8220;hard coat&#8221;. <a href=\"http:\/\/www.arkema-inc.com\/functional-additives\/certincoat-flat-glass-coatings\/index.cfm?pag=515\">Learn more about CVD&#8230;<\/a><\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#ffffff\"><strong>Emissivity<\/strong><\/td>\n<td bgcolor=\"#ffffff\">Emissivity refers to the ability of a surface to absorb or reflect heat. An energy efficient glazing technology, Low Emissivity glass is a poor absorber of heat!<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#e5e5e5\"><strong>Hard Coat<\/strong><\/td>\n<td bgcolor=\"#e5e5e5\">Also known as &#8220;pyrolytic&#8221;, hard coat refers to Low E glass manufactured via the CVD process. Because the coating is covalently bonded to the glass, hard coat Low E is extremely durable.<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#ffffff\"><strong>MSVD<\/strong><\/td>\n<td bgcolor=\"#ffffff\">MSVD, or <strong>M<\/strong>agnetron <strong>S<\/strong>putterering <strong>V<\/strong>acuum <strong>D<\/strong>eposition (also known as &#8220;sputtering&#8221;), is one of two main technologies used to manufacture Low Emissivity glass. In MSVD, a metal or ceramic target bombarded with ions releases atoms to form a thin coating on a sheet of glass. The resulting Low E product is often called &#8220;soft coat&#8221; or &#8220;sputtered&#8221;.<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#e5e5e5\"><strong>Pyrolytic<\/strong><\/td>\n<td bgcolor=\"#e5e5e5\">See &#8220;Hard Coat&#8221; or &#8220;CVD&#8221;<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#ffffff\"><strong>Soft Coat<\/strong><\/td>\n<td bgcolor=\"#ffffff\">Also know as &#8220;sputtered&#8221;, soft coat refers to Low E glass manufactured via the MSVD process. Less durable than its hard coat counterpart, soft coat Low E requires special storage and handling to prevent damage to the coating.<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#e5e5e5\"><strong>Solar Heat Gain Coefficient (SHGC)<\/strong><\/td>\n<td bgcolor=\"#e5e5e5\">The Solar Heat Gain Coefficient (or SHGC) refers to a window&#8217;s ability to transmit solar radiation. The SHGC ranges from 0-1. A value of 0 indicates that the window functions like a wall, essentially preventing any solar energy from entering the building. A value of 1 indicates that the window functions like an opening, allowing all solar energy in. In cold climates, a high SHGC can lower heating costs by using passive solar heating. In warm climates, a low SHGC is desired to keep unwanted heat out and reduce cooling costs.<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#ffffff\"><strong>Solar Selective Low E<\/strong><\/td>\n<td bgcolor=\"#ffffff\">Specifically designed to enhance comfort in warm climates, solar selective Low E is a Low E glass with a low solar heat gain coefficient, like Arkema&#8217;s Sun E<sup>TM<\/sup>.<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#e5e5e5\"><strong>Sputtered<\/strong><\/td>\n<td bgcolor=\"#e5e5e5\">See &#8220;Soft Coat&#8221; or &#8220;MSVD&#8221;<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#ffffff\"><strong>U-Value<\/strong><\/td>\n<td bgcolor=\"#ffffff\">Also known as the K-value, the U-value is a measure of a window&#8217;s ability to transfer heat (usually given in W\/m<sup>2<\/sup>K or Btu\/hr ft<sup>2<\/sup> <sup>o<\/sup>F). Windows with a low U-value, like Low Emissivity windows, are efficient insulators against heat loss.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.arkema-inc.com\/functional-additives\/certincoat-flat-glass-coatings\/images\/spacer.gif\" alt=\"\" width=\"10\" height=\"1\" border=\"0\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Courtesy of Certincoat Low E &#8211; How does it work?Low E glass coatings work by reflecting or absorbing IR light&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[14],"tags":[],"class_list":["post-160","post","type-post","status-publish","format-standard","hentry","category-how-to"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.glenarmbuilding.com\/site\/wp-json\/wp\/v2\/posts\/160","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.glenarmbuilding.com\/site\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.glenarmbuilding.com\/site\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.glenarmbuilding.com\/site\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.glenarmbuilding.com\/site\/wp-json\/wp\/v2\/comments?post=160"}],"version-history":[{"count":1,"href":"https:\/\/www.glenarmbuilding.com\/site\/wp-json\/wp\/v2\/posts\/160\/revisions"}],"predecessor-version":[{"id":1321,"href":"https:\/\/www.glenarmbuilding.com\/site\/wp-json\/wp\/v2\/posts\/160\/revisions\/1321"}],"wp:attachment":[{"href":"https:\/\/www.glenarmbuilding.com\/site\/wp-json\/wp\/v2\/media?parent=160"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.glenarmbuilding.com\/site\/wp-json\/wp\/v2\/categories?post=160"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.glenarmbuilding.com\/site\/wp-json\/wp\/v2\/tags?post=160"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}