VELUX Commercial Blog | VELUX Commercial

<!DOCTYPE html>      <html ng-app="vmsshop" class="" lang="en">  <head><meta charset="utf-8" /><meta name="viewport" content="width=device-width,initial-scale=1" /> <meta name="pageid" content="{371B78D9-0B44-4DEA-A6D0-C4EC2A10F224}" />  <link rel="preload" as="style" onload="this.rel='stylesheet'" href="//afd-commercial.velux.com/style/marketing/css/vms/library/960.min.css?key=171680101434677" /> <link rel="preload" as="style" onload="this.rel='stylesheet'" href="/style/marketing/css/vms/dist/css/core.min.css" /> <link rel="stylesheet" href="//afd-commercial.velux.com/style/marketing/css/vms/dist/css/components.min.css?key=171680102168402 " /> <link rel="stylesheet" href="//afd-commercial.velux.com/script/marketing/js/common/shadowbox/shadowbox.min.css?key=171680101346419" media="print" onload="this.media='screen'"/> <link rel="stylesheet" href="//afd-commercial.velux.com/style/marketing/css/baguettebox.min.css?key=171680100343785" media="print" onload="this.media='screen'" />   <link rel="shortcut icon" href="//afd-commercial.velux.com/style/marketing/images/favicon.ico?key=17168010040294" type="image/x-icon" /> <meta id="openGraphTitle" content="VELUX Commercial Blog" property="og:title" /><meta id="openGraphUrl" content="https://commercial.velux.co.uk/blog" property="og:url" /><meta id="openGraphDescription" content="VELUX Commercial鈥檚 blog area offers inspirational and detailed information for daylight design and skylight installations within commercial buildings." property="og:description" /><meta id="openGraphImage" content="http://afd-commercial.velux.com/-/media/vms/blog/building-design/skylight-energy-performance/6555568universityoflyonfrance.jpg" property="og:image" /><meta id="openGraphType" content="blog" property="og:type" /><meta id="twitterCard" content="summary" name="twitter:card" /><meta id="twitterSite" content="@VELUXCommercial" name="twitter:site" /><meta id="twitterCreator" content="@VELUXCommercial" name="twitter:creator" /><meta id="twitterTitle" content="VELUX Commercial Blog" name="twitter:title" /><meta id="twitterImage" content="http://afd-commercial.velux.com/-/media/vms/blog/building-design/skylight-energy-performance/6555568universityoflyonfrance.jpg" name="twitter:image:src" /> <script></script> <link rel="canonical" href="https://commercial.velux.co.uk/blog" /><script type="text/javascript">var dataLayer = [{page_id:"371B78D9-0B44-4DEA-A6D0-C4EC2A10F224" ,page_type: "GenericPage", country:"United Kingdom",language:"en-GB",http_code: "200", customer_status: "not logged in"}];</script> <script>window.countryCode = 'en-GB';</script>  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= 'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f); })(window,document,'script','dataLayer','GTM-KGQZDJB8');</script>  <title> VELUX Commercial Blog | VELUX Commercial </title><meta name="description" content="VELUX Commercial鈥檚 blog area offers inspirational and detailed information for daylight design and skylight installations within commercial buildings." /></head> <body class=" " style=""> <form method="post" action="/blog" id="form1"> <div class="aspNetHidden"> <input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="HdOMOSxZ9dC3xIVm6reyfj3l9Z67qOF7jj3n488gAiV8+a9VxSTcNX2zwV9XbrdXSUr6tlO6ZFkH/+Mgt9nTNxwhNwX6eN1LQoMD4JSICiU=" /> </div> <div class="aspNetHidden"> <input type="hidden" name="__VIEWSTATEGENERATOR" id="__VIEWSTATEGENERATOR" value="27E92332" /> <input type="hidden" name="__VIEWSTATEENCRYPTED" id="__VIEWSTATEENCRYPTED" value="" /> <input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="lGKODWodtSUpaGlimEIQ21awejNbz3MgRsBeoKDKWzaVjHXFy3VGmbwT1tkDNA4Ir68pOA+t8kivahLrOreMKLDvhsmPUeW6fPr3u3Gj0/M9KheM/U1WyXyAEx9JiwaFFh9IOofBUGkIHVwZrsBlP/ryGt2g40zxcCNdg0k/wufHMtRAIb25cV8NzhOV5GQX6E2TYICCuytB1uECQoB0pw==" /> </div> <div id="main"> <div class="fixedHeaderWrapper"> <div class="systemMessage" style="background-color: #476996;color:White"> <div class="systemMessage__type"> <i class="far fa-exclamation-triangle"></i> </div> <div class="systemMessage__content"> Xtralite and Vitral are now a part of VELUX Commercial, and we are delighted to welcome you to our new website. Here, you will find our complete portfolio of daylight solutions and services for industrial, commercial and public buildings. </div> <div class="systemMessage__close"> <i class="far fa-times"></i> </div> </div> <div class="service-menu "> <div class="container_12 clearfix"> <div class="grid_12"> <ul class="nav"> <nav> <ul class="level-1"> <li class="sub-menu " visible="False"> <div class=""> <a href="https://www.velux.co.uk/" rel="noreferrer" target="_blank" external> Skylights for homeowners </a> </div> <ul class="level-2"> </ul> </li> <li class="sub-menu " visible="False"> <div class=""> <a href="https://commercial.velux.co.uk/blog" target="_self" > <p>Blog</p> </a> </div> <ul class="level-2"> </ul> </li> <li class="sub-menu " visible="False"> <div class=""> <a href="https://commercial.velux.co.uk/newsletter" target="_self" > Newsletter </a> </div> <ul class="level-2"> </ul> </li> <li class="sub-menu " visible="False"> <div class=""> <a href="https://commercial.velux.co.uk/about" target="_self" title="About VELUX Commercial"> About </a> </div> <ul class="level-2"> </ul> </li> <li class="sub-menu " visible="False"> <div class=""> <a href="https://commercial.velux.co.uk/contact-us" target="_self" > Contact </a> </div> <ul class="level-2"> </ul> </li> </ul> </nav> <nav> <li class="country-selector-menu"> <i class="far fa-globe"></i> <a style="cursor: pointer" onclick="showCountrySelectorPopup(this);"> United Kingdom </a> </li> <div id="geo_module" style="display: none;"> <div id="geo_overlay"></div> <div id="geo_content"> <div class="close"> <i class="far fa-times"></i> </div> <h2 class="blue"> Select your country site </h2> <a href="https://commercial.velux.com/" target="_self"> <i class="far fa-globe"></i> Global website </a> <div id="marketing_main_header_0_AlternativeMenu_marketing_country_selector_pLocalSites" class="regionList1"> <div class="countryList1"> <a href="https://commercial.velux.at/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_austria.png" alt="Flag Austria" /><span>Austria</span></a><a href="https://commercial.velux.be" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_belgium.png" alt="Flag Belgium" /><span>Belgium</span></a><a href="https://commercial.velux.hr/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_croatia.png" alt="Flag Croatia" /><span>Croatia</span></a><a href="https://commercial.velux.cz/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_czech_republic.png" alt="Flag Czech Republic" /><span>Czech Republic</span></a><a href="https://commercial.velux.dk/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_denmark.png" alt="Flag Denmark" /><span>Denmark</span></a><a href="https://commercial.velux.fr/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_france.png" alt="Flag France" /><span>France</span></a><a href="https://commercial.velux.de" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_germany.png" alt="" /><span>Germany</span></a><a href="https://commercial.velux.hu/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_hungary.png" alt="Flag Hungary" /><span>Hungary</span></a><a href="https://commercial.velux.nl/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_netherlands.png" alt="Flag Netherland" /><span>Netherlands</span></a> </div><div class="countryList1"> <a href="https://commercial.velux.no/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_norway.png" alt="Flag Norway" /><span>Norway</span></a><a href="https://commercial.velux.pl/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_poland.png" alt="Flag Poland" /><span>Poland</span></a><a href="https://commercial.velux.ro/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_romania.png" alt="Flag Romania" /><span>Romania</span></a><a href="https://commercial.velux.se/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_sweden.png" alt="Flag Sweden" /><span>Sweden</span></a><a href="https://commercial.velux.ch" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_switzerland.png" alt="Flag Switzerland" /><span>Switzerland</span></a><a href="https://commercial.velux.co.uk/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_united_kingdom.png" alt="Flag United Kingdom" /><span>United Kingdom</span></a><a href="https://www.velux.ca/en-ca/professional" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_canada.png" alt="Flag Canada" /><span>Canada</span></a><a href="https://commercial.veluxusa.com/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_usa.png" alt="Flag United States" /><span>United States </span></a><a href="https://commercial.velux.com/export" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/earth.png" alt="globe" /><span>Rest of the world</span></a> </div> </div> </div> </div> </nav> </ul> </div> </div> </div> <header class="big-menu"> <div class="header-bottom-bg"></div> <div class="big-menu-wrapper"> <div class="container_12 clearfix"> <div class="grid_12"> <div class="menu wrapper white"> <div class="logo"> <a href="/"> <img src="//afd-commercial.velux.com/-/media/vms/logo/velux-commercial-logo-2.png?h=50&iar=0&w=303&key=-62135596800" alt="VELUX Commercial" width="303" height="50" /> </a> </div> <aside class="search show" data-full-search-url="/search?search="> <i class="velux-icon icon-search"></i> <div class="search-box"> <div tabindex="-1" class="search-field"> <input name="marketing_main_header_0$Search$SearchInput" type="text" id="marketing_main_header_0_Search_SearchInput" autocomplete="off" data-siteid="uk_en-gb" /> <i class="velux-icon icon-cross"></i> <div class="search-suggest"></div> </div> <div class="button right red"> <a> Search<i class="velux-icon icon-search-white"></i> </a> </div> <div class="search-filters" > </div> </div> </aside> <nav> <div class="nav-toggle"><i class="velux-icon icon-menu-toggle"></i></div> <ul class="level-1"> <li class="sub-menu "> <a>Products</a> <ul class="level-2"> <li class="sub-menu "> <ul class="level-3"><li> <ul> <li class="menu-title"></li> <li > <a href="https://commercial.velux.co.uk/products" target="_self" > <h3>Products</h3> </a> </li> <li > <a href="https://commercial.velux.co.uk/products/domes-rooflights-and-flat-glass-rooflights" target="_self" > <h4>Dome Rooflights and Flat <br /> Glass Rooflights </h4> <br /> </a> </li> <li > <a href="https://commercial.velux.co.uk/products/domes-rooflights-and-flat-glass-rooflights" target="_self" > <img alt="" height="180" width="240" _languageinserted="true" src="//afd-commercial.velux.com/-/media/vms/products/megamenu/domes-and-flat-roof-windows.jpg?la=da"> </a> </li> <li > <a href="https://commercial.velux.co.uk/products/domes-rooflights-and-flat-glass-rooflights/dome-rooflights" target="_self" > Dome Rooflights </a> </li> <li > <a href="https://commercial.velux.co.uk/products/domes-rooflights-and-flat-glass-rooflights/modular-rooflights" target="_self" > Modular Rooflights </a> </li> <li > </li> </ul> </li></ul><ul class="level-3"><li> <ul> <li class="menu-title"></li> <li > <a href="https://commercial.velux.co.uk/products/continuous-polycarbonate-rooflights" target="_self" > <br /> <h4>Continuous Polycarbonate<br /> Rooflights</h4> <br /> </a> </li> <li > <a href="https://commercial.velux.co.uk/products/continuous-polycarbonate-rooflights" target="_self" > <img alt="" height="180" width="240" _languageinserted="true" src="//afd-commercial.velux.com/-/media/vms/products/megamenu/continuous-rooflights.gif?la=da"> </a> </li> <li > <a href="https://commercial.velux.co.uk/products/continuous-polycarbonate-rooflights/vario" target="_self" > Vario Continuous Rooflights </a> </li> <li > <a href="https://commercial.velux.co.uk/products/continuous-polycarbonate-rooflights/specialist-continuous-rooflights" target="_self" > Specialist Continuous Rooflights </a> </li> </ul> </li></ul><ul class="level-3"><li> <ul> <li class="menu-title"></li> <li > <a href="https://commercial.velux.co.uk/products/glass-roof-systems" target="_self" > <br /> <h4>Glass Roof Systems</h4> <br /> <br /> </a> </li> <li > <a href="https://commercial.velux.co.uk/products/glass-roof-systems" target="_self" > <img alt="" height="180" width="240" _languageinserted="true" src="//afd-commercial.velux.com/-/media/vms/products/megamenu/glass-systems.jpg?la=da"> </a> </li> <li > <a href="https://commercial.velux.co.uk/products/glass-roof-systems/modular-skylights" target="_self" > Modular Skylights </a> </li> <li > <a href="https://commercial.velux.co.uk/products/glass-roof-systems/glazing-panels" target="_self" > Glazing Panels </a> </li> <li > <a href="https://commercial.velux.co.uk/products/glass-roof-systems/structural-glazing-system" target="_self" > Structural Glazing System </a> </li> <li > <a href="https://commercial.velux.co.uk/products/domes-rooflights-and-flat-glass-rooflights/modular-rooflights/solutions/linearlight" target="_self" > Modular Rooflights - Linearlight </a> </li> </ul> </li></ul><ul class="level-3"><li> <ul> <li class="menu-title"></li> <li > <a href="https://commercial.velux.co.uk/products/smoke-and-natural-ventilation" target="_self" > <br /> <h4>Smoke and Natural<br /> Ventilation</h4> <br /> </a> </li> <li > <a href="https://commercial.velux.co.uk/products/smoke-and-natural-ventilation" target="_self" > <img alt="" height="180" width="240" _languageinserted="true" src="//afd-commercial.velux.com/-/media/vms/products/megamenu/smoke-exhaust.gif?la=da"> </a> </li> <li > <a href="https://commercial.velux.co.uk/products/smoke-and-natural-ventilation/smoke-ventilation" target="_self" > Smoke Ventilation </a> </li> <li > <a href="https://commercial.velux.co.uk/products/smoke-and-natural-ventilation/comfort-ventilation" target="_self" > Comfort Ventilation </a> </li> <li > <a href="https://commercial.velux.co.uk/products/smoke-and-natural-ventilation/daylight-and-heat-control" target="_self" > Daylight and Heat Control </a> </li> </ul> </li></ul> </li> </ul> </li> <li class="sub-menu "> <a>Service and Support</a> <ul class="level-2"> <li class="sub-menu "> <ul class="level-3"><li> <ul> <li class="menu-title"></li> <li > <a href="https://commercial.velux.co.uk/service-and-support" target="_self" > <h3>Service and Support</h3> </a> </li> </ul> <ul> <li class="menu-title">Service</li> <li > <a href="https://commercial.velux.co.uk/service-and-support/installation-service" target="_self" > Installation Service </a> </li> <li > <a href="https://commercial.velux.co.uk/service-and-support/service-agreement" target="_self" > Service Agreement </a> </li> </ul> </li></ul><ul class="level-3"><li> <ul> <li class="menu-title"><h3></h3></li> </ul> <ul> <li class="menu-title">Support</li> <li > <a href="https://commercial.velux.co.uk/service-and-support/renovation" target="_self" > Renovation </a> </li> <li > <a href="https://commercial.velux.co.uk/service-and-support/end-to-end-rooflight-support" target="_self" > End-to-End Rooflight Support </a> </li> <li > <a href="https://commercial.velux.co.uk/service-and-support/velux-commercial-cpd" target="_self" > VELUX Commercial CPD seminars </a> </li> <li > <a href="https://commercial.velux.co.uk/service-and-support/daylight-visualizer" target="_self" > VELUX Daylight Visualizer </a> </li> <li > <a href="https://commercial.velux.co.uk/service-and-support/cad-bim" target="_self" > CAD/BIM </a> </li> </ul> </li></ul><ul class="level-3"><li> <ul> <li class="menu-title"><h3></h3></li> </ul> <ul> <li class="menu-title">Contact us</li> <li > <a href="https://commercial.velux.co.uk/contact-us/get-price-estimate" target="_self" > Price estimate </a> </li> <li > <a href="https://commercial.velux.co.uk/contact-us/project-support" target="_self" > Project support </a> </li> <li > <a href="https://commercial.velux.co.uk/contact-us/technical-support" target="_self" > Technical support </a> </li> <li > <a href="https://commercial.velux.co.uk/contact-us/complaint" target="_self" > Complaint </a> </li> </ul> </li></ul> </li> </ul> </li> <li class=" "> <a href='https://commercial.velux.co.uk/downloadcentre' target=''>Download Centre</a> <ul class="level-2"> </ul> </li> <li class="sub-menu "> <a>Inspiration</a> <ul class="level-2"> <li class="sub-menu "> <ul class="level-3"><li> <ul> <li class="menu-title"></li> <li > <a href="https://commercial.velux.co.uk/inspiration" target="_self" > <h3>Inspiration</h3> </a> </li> <li > <a href="https://commercial.velux.co.uk/inspiration/case-study" target="_self" > Case Studies </a> </li> <li > <a href="https://commercial.velux.co.uk/inspiration/gallery" target="_self" > Gallery </a> </li> </ul> </li></ul><ul class="level-3"><li> <ul> <li class="menu-title"></li> <li > <a href="https://commercial.velux.co.uk/inspiration/ebooks" target="_self" > <br /> eBooks </a> </li> <li class="active"> <a href="https://commercial.velux.co.uk/blog" target="_self" > Blog </a> </li> </ul> </li></ul><ul class="level-3"><li> <ul> <li class="menu-title"></li> <li > <a href="https://commercial.velux.co.uk/inspiration/news-and-events" target="_self" > <br />News and Events </a> </li> </ul> </li></ul><ul class="level-3"><li> <ul> <li class="menu-title">Subscribe to our newsletter</li> <li > <a href="https://commercial.velux.co.uk/newsletter" target="_self" > <p><img alt="" src="//afd-commercial.velux.com/-/media/vms/newsletter/university-of-southern-denmar-280.jpg" style="height:185px; width:240px;" _languageinserted="true" /></p> <p>Receive regular insights straight to your inbox</p> </a> </li> </ul> </li></ul> </li> </ul> </li> </ul> </nav> </div> </div> </div> </div> </header> <header class="mobile-menu "> <div class="header-bottom-bg"></div> <div class="menu wrapper white clearfix"> <div class="logo"> <a href="/"> <img src="//afd-commercial.velux.com/-/media/vms/logo/velux-commercial-logo-mobile.png?h=104&iar=0&w=150&key=-62135596800" alt="VELUX Commercial logo" width="150" height="104" /> </a> </div> <div class="menu-container"> <a href="/contact-us" class="header-menu-link"> Contact us </a> <div class="nav-toggle">Menu<i class="velux-icon icon-menu-toggle"></i></div> <nav class="is-hidden"> <aside class="language-wrapper"> </aside>  <aside class="search show" data-full-search-url="/search?search="> <div class="search-box"> <div class="search-field"> <input placeholder="Search" type="Search" /> <i class="velux-icon icon-cross"></i> </div> <div class="button right small"> <a>Search<i class="velux-icon icon-search-white"></i></a></div> </div> </aside> <div class="regular"> <ul class="open"> <li class="sub-menu "> <div class="menu-item"> Products </div> <ul class="level-2"> <li> <div class=""> <a href="https://commercial.velux.co.uk/products" target="_self" class='menu-link'> <h2>Products</h2> </a> </div> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/products/domes-rooflights-and-flat-glass-rooflights" target="_self" class='menu-link'> <h3>Dome rooflights and flat rooflights</h3> </a> </div> <ul class="level-3"> <li> <div class=""> <a href="https://commercial.velux.co.uk/products/domes-rooflights-and-flat-glass-rooflights/dome-rooflights" target="_self" class='menu-link'> Dome Rooflights </a> </div> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/products/domes-rooflights-and-flat-glass-rooflights/modular-rooflights" target="_self" class='menu-link'> Modular Rooflights </a> </div> </li> <li> </li> </ul> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/products/continuous-polycarbonate-rooflights" target="_self" class='menu-link'> <h3>Continuous polycarbonate rooflights</h3> </a> </div> <ul class="level-3"> <li> <div class=""> <a href="https://commercial.velux.co.uk/products/continuous-polycarbonate-rooflights/vario" target="_self" class='menu-link'> Vario Continuous Rooflights </a> </div> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/products/continuous-polycarbonate-rooflights/specialist-continuous-rooflights" target="_self" class='menu-link'> Specialist continuous rooflights </a> </div> </li> </ul> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/products/glass-roof-systems" target="_self" class='menu-link'> <h3>Glass roof systems</h3> </a> </div> <ul class="level-3"> <li> <div class=""> <a href="https://commercial.velux.co.uk/products/glass-roof-systems/glazing-panels" target="_self" class='menu-link'> Glazing Panels </a> </div> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/products/glass-roof-systems/modular-skylights" target="_self" class='menu-link'> Modular Skylights </a> </div> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/products/glass-roof-systems/structural-glazing-system" target="_self" class='menu-link'> Stick Systems </a> </div> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/products/domes-rooflights-and-flat-glass-rooflights/modular-rooflights/solutions/linearlight" target="_self" class='menu-link'> Modular Rooflights - Linearlight </a> </div> </li> </ul> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/products/smoke-and-natural-ventilation" target="_self" class='menu-link'> <h3>Smoke and natural ventilation</h3> </a> </div> <ul class="level-3"> <li> <div class=""> <a href="https://commercial.velux.co.uk/products/smoke-and-natural-ventilation/smoke-ventilation" target="_self" class='menu-link'> Smoke Ventilation </a> </div> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/products/smoke-and-natural-ventilation/comfort-ventilation" target="_self" class='menu-link'> Comfort Ventilation </a> </div> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/products/smoke-and-natural-ventilation/daylight-and-heat-control" target="_self" class='menu-link'> Daylight and Heat Control </a> </div> </li> </ul> </li> </ul> </li> <li class="sub-menu "> <div class="menu-item"> Download centre </div> <ul class="level-2"> <li> <div class=""> <a href="https://commercial.velux.co.uk/downloadcentre" target="_self" class='menu-link'> Download centre </a> </div> </li> </ul> </li> <li class="sub-menu "> <div class="menu-item"> Service and Support </div> <ul class="level-2"> <li> <div class=""> <a href="https://commercial.velux.co.uk/service-and-support" target="_self" class='menu-link'> <h3>Service and Support</h3> </a> </div> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/service-and-support/installation-service" target="_self" class='menu-link'> Installation Service </a> </div> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/service-and-support/service-agreement" target="_self" class='menu-link'> Service Agreement </a> </div> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/service-and-support/renovation" target="_self" class='menu-link'> Renovation </a> </div> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/service-and-support/end-to-end-rooflight-support" target="_self" class='menu-link'> End-to-End Rooflight Support </a> </div> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/service-and-support/velux-commercial-cpd" target="_self" class='menu-link'> VELUX Commercial CPD seminars </a> </div> </li> <li> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/service-and-support/daylight-visualizer" target="_self" class='menu-link'> VELUX Daylight Visualizer </a> </div> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/service-and-support/cad-bim" target="_self" class='menu-link'> CAD / BIM </a> </div> </li> </ul> </li> <li class="sub-menu "> <div class="menu-item"> Inspiration </div> <ul class="level-2"> <li> <div class=""> <a href="https://commercial.velux.co.uk/inspiration" target="_self" class='menu-link'> <h3>Inspiration</h3> </a> </div> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/inspiration/case-study" target="_self" class='menu-link'> Case Studies </a> </div> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/inspiration/gallery" target="_self" class='menu-link'> Gallery </a> </div> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/inspiration/ebooks" target="_self" class='menu-link'> eBooks </a> </div> </li> <li> <div class=""> <a href="https://commercial.velux.co.uk/inspiration/news-and-events" target="_self" class='menu-link'> News and Events </a> </div> </li> </ul> </li> <li class="country-selector-menu"> <i class="far fa-globe"></i> <a style="cursor: pointer" onclick="showCountrySelectorPopup(this);"> United Kingdom </a> </li> <div id="geo_module" style="display: none;"> <div id="geo_overlay"></div> <div id="geo_content"> <div class="close"> <i class="far fa-times"></i> </div> <h2 class="blue"> Select your country site </h2> <a href="https://commercial.velux.com/" target="_self"> <i class="far fa-globe"></i> Global website </a> <div id="marketing_main_header_0_MobileMenu_marketing_country_selector_pLocalSites" class="regionList1"> <div class="countryList1"> <a href="https://commercial.velux.at/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_austria.png" alt="Flag Austria" /><span>Austria</span></a><a href="https://commercial.velux.be" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_belgium.png" alt="Flag Belgium" /><span>Belgium</span></a><a href="https://commercial.velux.hr/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_croatia.png" alt="Flag Croatia" /><span>Croatia</span></a><a href="https://commercial.velux.cz/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_czech_republic.png" alt="Flag Czech Republic" /><span>Czech Republic</span></a><a href="https://commercial.velux.dk/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_denmark.png" alt="Flag Denmark" /><span>Denmark</span></a><a href="https://commercial.velux.fr/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_france.png" alt="Flag France" /><span>France</span></a><a href="https://commercial.velux.de" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_germany.png" alt="" /><span>Germany</span></a><a href="https://commercial.velux.hu/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_hungary.png" alt="Flag Hungary" /><span>Hungary</span></a><a href="https://commercial.velux.nl/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_netherlands.png" alt="Flag Netherland" /><span>Netherlands</span></a> </div><div class="countryList1"> <a href="https://commercial.velux.no/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_norway.png" alt="Flag Norway" /><span>Norway</span></a><a href="https://commercial.velux.pl/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_poland.png" alt="Flag Poland" /><span>Poland</span></a><a href="https://commercial.velux.ro/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_romania.png" alt="Flag Romania" /><span>Romania</span></a><a href="https://commercial.velux.se/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_sweden.png" alt="Flag Sweden" /><span>Sweden</span></a><a href="https://commercial.velux.ch" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_switzerland.png" alt="Flag Switzerland" /><span>Switzerland</span></a><a href="https://commercial.velux.co.uk/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_united_kingdom.png" alt="Flag United Kingdom" /><span>United Kingdom</span></a><a href="https://www.velux.ca/en-ca/professional" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_canada.png" alt="Flag Canada" /><span>Canada</span></a><a href="https://commercial.veluxusa.com/" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/flag_usa.png" alt="Flag United States" /><span>United States </span></a><a href="https://commercial.velux.com/export" class="country"><img src="//afd-commercial.velux.com/-/media/marketing/system/flags/earth.png" alt="globe" /><span>Rest of the world</span></a> </div> </div> </div> </div> <li id="lilanguageselector"> </li> </ul> </div> <div class="service"> <ul class="level-1 service-menu"> <li class="sub-menu"> <div class=""> <a href="https://commercial.velux.co.uk/about" target="_self" class='menu-link'> <span style="color: #ffffff;">About VELUX Commercial</span> </a> </div> </li> <li class="sub-menu"> <div class=""> <a href="https://commercial.velux.co.uk/blog" target="_self" class='menu-link link-current'> <span style="color: #ffffff;">Blog</span> </a> </div> </li> <li class="sub-menu"> <div class=""> <a href="https://commercial.velux.co.uk/newsletter" target="_self" class='menu-link'> Newsletter </a> </div> </li> <li class="sub-menu"> <div class=""> <a href="https://www.velux.co.uk/" target="_self" externalclass='menu-link'> Skylights for homeowners </a> </div> </li> </ul> </div> </nav> </div> </div> </header> </div> <div class="container_12 breadcrumbs"> <div class="grid_12"> <span class="breadcrumbs__element"> <a href="/">Home</a> <i class="far fa-angle-right"></i> </span> <span class="breadcrumbs__element"> Blog </span> </div> </div> <main> <div class="container_12 clearfix blog"> <div class="grid_8"> <div class="blog__header"> <h1>VELUX Commercial Blog</h1> <p><p>The VELUX Commercial blog area is where you will find sources of information covering all aspects of daylight and ventilation design and skylight installation within industrial, commercial and public buildings.</p> <p>So that you can find information relevant to your needs, our blog posts, written using our knowledge and expertise, are split into the categories below. From sustainable building design to office ventilation strategies we guide you through the key aspects of transforming spaces into healthy and inspiring places using daylight and fresh air.</p></p> </div> <div class="blog__mobileCategories"> <div class="blog__categories"> <div class="blog__categories_title" onclick="this.classList.toggle('is-active')"> <h2>Category</h2> </div> <ul> <li > <a href="/blog/building-design"> Building Design (29) </a> </li> <li > <a href="/blog/daylight"> Daylight (20) </a> </li> <li > <a href="/blog/learning-environments"> Learning environments (15) </a> </li> <li > <a href="/blog/products"> Products (6) </a> </li> <li > <a href="/blog/regulations-and-standards"> Regulations & Standards (3) </a> </li> <li > <a href="/blog/renovation"> Renovation (4) </a> </li> <li > <a href="/blog/ventilation"> Ventilation (8) </a> </li> </ul> </div> </div> <div class="blog__mainArticle"> <img src="//afd-commercial.velux.com/-/media/vms/blog/building-design/skylight-energy-performance/6555568universityoflyonfrance.jpg?h=425&w=700&la=en-GB&hash=E4BF50126411D6DAE00A76102D0365E4" alt="View from the roof of the University of Lyon" /> <div class="blog__tags"> <div class="blog__tags_inner"> Building Design </div> </div> <h2> Understanding Skylight Energy Performance: What is the U-value, the G-value and Energy Balance? </h2> <p> A building’s carbon dioxide emissions and energy use are heavily influenced by the balance of heat loss against solar gains. Therefore, when designing a building, it is helpful to understand the relation between thermal transmittance, glazing and the different levels of thermal performance. </p> <div class="button-wrapper"> <div class="button dark right"> <a href="/blog/building-design/skylight-energy-performance"> Read more <i class="velux-icon icon-chevron-right-white"></i> </a> </div> </div> </div> </div> <div class="grid_4"> <div class="blog__categories"> <div class="blog__categories_title" onclick="this.classList.toggle('is-active')"> <h2>Category</h2> </div> <ul> <li > <a href="/blog/building-design"> Building Design (29) </a> </li> <li > <a href="/blog/daylight"> Daylight (20) </a> </li> <li > <a href="/blog/learning-environments"> Learning environments (15) </a> </li> <li > <a href="/blog/products"> Products (6) </a> </li> <li > <a href="/blog/regulations-and-standards"> Regulations & Standards (3) </a> </li> <li > <a href="/blog/renovation"> Renovation (4) </a> </li> <li > <a href="/blog/ventilation"> Ventilation (8) </a> </li> </ul> </div> <div class="blog__form"> <div> <h2>Subscribe to our newsletter</h2> <p>Sign up to our newsletter and receive monthly updates on new products, insights, and daylight inspiration. You can unsubscribe at any time.</p> </div> <div>  <script charset="utf-8" type="text/javascript" src="//js.hsforms.net/forms/v2.js"></script> <script> hbspt.forms.create({ portalId: "4113912", formId: "5b775443-f84b-4fc5-861d-a880da3f8ca1" }); </script> </div> </div> </div> </div> <script src="/script/Marketing/VMS/modules/min/blog.min.js"></script> <section class="blog blog__articles"> <div class="container_12"> <div class="grid_4 blog__articles_element"> <div class="blog__articles_element_contentWrapper"> <a class="blog__articles_imageLink" href="/blog/building-design/what-is-the-u-value"> <img src="//afd-commercial.velux.com/-/media/vms/blog/building-design/what-is-the-u-value/promega-logistics-center-interior-rooflights-10155243.jpg?h=425&w=700&la=en-GB&hash=407CC8B8BEF65F9A654A5368C213E708" alt="VELUX Modular Skylights Northlights at the Promega Logistics Center" /> </a> <div class="blog__articles_element_content"> <div class="blog__tags"> <a class="blog__tags_inner" href="/blog/building-design"> Building Design </a> </div> <h2> <a class="blog__articles_headerLink" href="/blog/building-design/what-is-the-u-value"> What is the U-value? </a> </h2> </div> <p> When it comes to energy efficiency in buildings, understanding the U-value of building components is crucial. U-value is a key factor in determining the thermal performance of our products, too. </p> </div> <div class="button-wrapper"> <div class="button dark right"> <a href="/blog/building-design/what-is-the-u-value"> Go to article <i class="velux-icon icon-chevron-right-white"></i> </a> </div> </div> </div> <div class="grid_4 blog__articles_element"> <div class="blog__articles_element_contentWrapper"> <a class="blog__articles_imageLink" href="/blog/products/daylight-solutions-for-swimming-pools"> <img src="//afd-commercial.velux.com/-/media/vms/blog/products/daylight-solutions-for-swimming-pools/377244_id10117729_146652-01_piscine_romont_0225.jpg?h=425&w=700&la=en-GB&hash=FE8872BD963072C25ADD97BCA76C61E6" alt="Main pool in the Romont Cultural and Sports Complex" /> </a> <div class="blog__articles_element_content"> <div class="blog__tags"> <a class="blog__tags_inner" href="/blog/products"> Products </a> </div> <h2> <a class="blog__articles_headerLink" href="/blog/products/daylight-solutions-for-swimming-pools"> Daylight Solutions for Swimming Pools </a> </h2> </div> <p> The architecture of swimming pools has many challenges with regards to the use of materials and design. With proper planning and installation, skylights can significantly enhance the aesthetics and functionality of your pool area. </p> </div> <div class="button-wrapper"> <div class="button dark right"> <a href="/blog/products/daylight-solutions-for-swimming-pools"> Go to article <i class="velux-icon icon-chevron-right-white"></i> </a> </div> </div> </div> <div class="grid_4 blog__articles_element"> <div class="blog__articles_element_contentWrapper"> <a class="blog__articles_imageLink" href="/blog/building-design/daylight-solutions-for-hotels-and-conference-centres"> <img src="//afd-commercial.velux.com/-/media/vms/blog/building-design/daylight-solutions-for-hotels-and-conference-centres/glazing-panels-bodmin-jail-hotel-526029.jpg?h=425&w=700&la=en-GB&hash=B8AC9473491F5708D8B62A7FFA2FCD9E" alt="The Bodmin Jail Hotel" /> </a> <div class="blog__articles_element_content"> <div class="blog__tags"> <a class="blog__tags_inner" href="/blog/building-design"> Building Design </a> </div> <h2> <a class="blog__articles_headerLink" href="/blog/building-design/daylight-solutions-for-hotels-and-conference-centres"> Daylight solutions for hotels and conference centres </a> </h2> </div> <p> Realizing the potential of daylight in hotel and conference centre projects has several benefits. Guest and visitors can experience better time spent in more natural communal spaces. While staff have shown improved happiness and an increase in productivity. </p> </div> <div class="button-wrapper"> <div class="button dark right"> <a href="/blog/building-design/daylight-solutions-for-hotels-and-conference-centres"> Go to article <i class="velux-icon icon-chevron-right-white"></i> </a> </div> </div> </div> <div class="grid_4 blog__articles_element"> <div class="blog__articles_element_contentWrapper"> <a class="blog__articles_imageLink" href="/blog/daylight/six-building-schemes-you-can-follow-to-design-healthy-buildings"> <img src="//afd-commercial.velux.com/-/media/vms/blog/daylight/six-building-schemes-you-can-follow-to-design-healthy-buildings/hessenwaldschule-interior-with-daylight-134048.jpg?h=425&w=700&la=en-GB&hash=4317A89E4030513EC2D541BA6C7E7038" alt="Hessenwaldschule with daylight" /> </a> <div class="blog__articles_element_content"> <div class="blog__tags"> <a class="blog__tags_inner" href="/blog/daylight"> Daylight </a> </div> <h2> <a class="blog__articles_headerLink" href="/blog/daylight/six-building-schemes-you-can-follow-to-design-healthy-buildings"> Six building schemes you can follow to design healthy buildings </a> </h2> </div> <p> How do you design and operate a healthy building? Answers to these questions can be found in an increasing number of methodologies and rating schemes that have seen the light around the world in recent years. They all share the ambition to strengthen the health and well-being of building users. Yet, they vary widely in terms of their overall scope, the metrics they use as proof of performance, and the weight that they put on the different phases in a building鈥檚 life cycle. The following chronological overview presents a selection of the most important and forward-looking tools, as well as their underlying methodologies. </p> </div> <div class="button-wrapper"> <div class="button dark right"> <a href="/blog/daylight/six-building-schemes-you-can-follow-to-design-healthy-buildings"> Go to article <i class="velux-icon icon-chevron-right-white"></i> </a> </div> </div> </div> <div class="grid_4 blog__articles_element"> <div class="blog__articles_element_contentWrapper"> <a class="blog__articles_imageLink" href="/blog/learning-environments/why-indoor-air-quality-is-important-and-how-to-improve-it"> <img src="//afd-commercial.velux.com/-/media/vms/blog/learning-enviroments/why-indoor-air-quality-is-important-and-how-to-improve-it/exeter-college-skylights-from-inside-and-outside-135850-135858.jpg?h=425&w=700&la=en-GB&hash=556C53096FEC40C317277E178135B374" alt="VELUX Modular Skylights provide Exeter College with daylight" /> </a> <div class="blog__articles_element_content"> <div class="blog__tags"> <a class="blog__tags_inner" href="/blog/learning-environments"> Learning environments </a> </div> <h2> <a class="blog__articles_headerLink" href="/blog/learning-environments/why-indoor-air-quality-is-important-and-how-to-improve-it"> Why indoor air quality is important and how to improve it </a> </h2> </div> <p> Did you know that well-designed classrooms have a significant influence on academic performance? Studies have found that improved physical characteristics of classrooms can boost the learning outcomes of students. </p> </div> <div class="button-wrapper"> <div class="button dark right"> <a href="/blog/learning-environments/why-indoor-air-quality-is-important-and-how-to-improve-it"> Go to article <i class="velux-icon icon-chevron-right-white"></i> </a> </div> </div> </div> <div class="grid_4 blog__articles_element"> <div class="blog__articles_element_contentWrapper"> <a class="blog__articles_imageLink" href="/blog/renovation/rebuilding-a-schools-character-with-plenty-of-daylight"> <img src="//afd-commercial.velux.com/-/media/vms/blog/products/rebuilding-a-schools-character-with-plenty-of-daylight/velux-modular-skylights-saagbaeckgymnasiet-118613-02.jpg?h=425&w=700&la=en-GB&hash=E64A12887E1191C1161D1680DC6331FC" alt="Rooflight solution with Northlight modules. HIgh school S氓gb盲ckgymnasiet - Interior." /> </a> <div class="blog__articles_element_content"> <div class="blog__tags"> <a class="blog__tags_inner" href="/blog/renovation"> Renovation </a> </div> <h2> <a class="blog__articles_headerLink" href="/blog/renovation/rebuilding-a-schools-character-with-plenty-of-daylight"> Rebuilding a school鈥檚 character with plenty of daylight </a> </h2> </div> <p> In 2012 local authorities ended more than 10 years of talks by adopting a plan to refurbish the old vocational school in Huddinge, Sweden. The school, originally built in 1961, represented classic 60s architecture and was good quality. </p> </div> <div class="button-wrapper"> <div class="button dark right"> <a href="/blog/renovation/rebuilding-a-schools-character-with-plenty-of-daylight"> Go to article <i class="velux-icon icon-chevron-right-white"></i> </a> </div> </div> </div> </div> </section> <section class=" " id=""> <div style="background-color:#f5f5f5;" class="section-background"> </div> <div class="container_12 clearfix " id=""> <article class="grid_8 "> <div class="filterenabled spot-wrapper" > <div class="ImageHeadlineTextLink"> <div class="article-wrapper"> <h2>Guide to Daylighting and EN 17037 </h2> <div class="article-content clearfix"> <h5>Free whitepaper</h5><p>Learn more about the new European Standard EN 17037, why it matters and the impact of daylighting on building performance and occupant comfort.</p> </div> </div> <div class="button-wrapper"> <div class="button dark left"> <a href="https://commercial.velux.co.uk/inspiration/ebooks/guide-to-daylighting-and-en17037" target="_self" > Read whitepaper  <i class="far fa-chevron-right"></i> </a> </div> </div> </div> </div> </article> <article class="grid_4 "> <div class="filterenabled spot-wrapper" > <div class="image-wrapper image-spot"> <img data-original="//afd-commercial.velux.com/-/media/vms/inspiration/e-books/guide-to-daylighting-and-en-17037/guide-to-daylighting-and-en-17037-ebook-in-screen-eng.png?h=441&iar=0&w=540&cc=grid_4&key=-62135596800" alt="eBook: Guide to Daylighting and EN 17037 " cc="grid_4" class=" lazy" /> </div> </div> </article> </div> </section> </main> </div> <footer> <div class="footer-tabs"> <div class="container_12 clearfix"> <div class="grid_12"> <div class="tab-title active "> Products</div> </div> </div> </div>  <nav class="active "> <div class="container_12 clearfix">  <ul class="footer-nav-1"> <li class="menu-title"> Products </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/products/domes-rooflights-and-flat-glass-rooflights" target="_self" ><strong>Dome Rooflights and Flat Glass Rooflights</strong></a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/products/domes-rooflights-and-flat-glass-rooflights/dome-rooflights" target="_self" >Dome Rooflights</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/products/domes-rooflights-and-flat-glass-rooflights/modular-rooflights" target="_self" >Modular Rooflights</a> </li> <li class="menu-item"> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/products/continuous-polycarbonate-rooflights" target="_self" ><strong>Continuous Polycarbonate Rooflights</strong></a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/products/continuous-polycarbonate-rooflights/vario" target="_self" >Vario Continuous Rooflights</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/products/continuous-polycarbonate-rooflights/specialist-continuous-rooflights" target="_self" >Specialist Continuous Rooflights</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/products/glass-roof-systems" target="_self" ><strong>Glass Roof Systems</strong></a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/products/glass-roof-systems/modular-skylights" target="_self" >Modular Skylights</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/products/glass-roof-systems/glazing-panels" target="_self" >Glazing Panels</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/products/glass-roof-systems/structural-glazing-system" target="_self" >Structural Glazing System</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/products/domes-rooflights-and-flat-glass-rooflights/modular-rooflights/solutions/linearlight" target="_self" >Modular Rooflights - Linearlight</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/products/smoke-and-natural-ventilation" target="_self" ><strong>Smoke and Natural Ventilation</strong></a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/products/smoke-and-natural-ventilation/smoke-ventilation" target="_self" >Smoke Ventilation</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/products/smoke-and-natural-ventilation/comfort-ventilation" target="_self" >Comfort Ventilation</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/products/smoke-and-natural-ventilation/daylight-and-heat-control" target="_self" >Daylight and Heat Control</a> </li> </ul> <ul class="footer-nav-2"> <li class="menu-title"> Inspiration </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/newsletter" target="_self" >Subscribe to our newsletter</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/inspiration/case-study" target="_self" >Case Studies</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/inspiration/gallery" target="_self" >Gallery</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/downloadcentre" target="_self" >Download centre</a> </li> <li class="menu-item"> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/inspiration/ebooks" target="_self" >eBooks</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/blog" target="_self" >Blog</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/service-and-support/daylight-visualizer" target="_self" >VELUX Daylight Visualizer</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/service-and-support/cad-bim" target="_self" >CAD / BIM</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/service-and-support/velux-commercial-cpd" target="_self" >VELUX Commercial CPD seminars</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/inspiration/news-and-events" target="_self" >News and Events</a> </li> </ul> <ul class="footer-nav-3"> <li class="menu-title"> About </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/about" target="_self" >VELUX Commercial</a> </li> <li class="menu-item"> <a href="https://velux.wd3.myworkdayjobs.com/en-US/Velux_Commercial" target="_self" external>Available jobs</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/about/privacy-statement" target="_self" >Privacy Statement</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/about/legal-notice" target="_self" >Legal Notice</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/about/cookie-policies" target="_self" >Cookie Policy</a> </li> <li class="menu-item"> <a href="https://www.velux.com/ce-marking" target="_self" external>CE Marking</a> </li> <li class="menu-item"> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/about/tax-strategy" target="_self" >Tax strategy for the VKR Group</a> </li> <li class="menu-item"> <a href="https://commercial.velux.co.uk/about/other-velux-sites" target="_self" >Other VELUX Websites</a> </li> <li class="menu-item"> <a href="//afd-commercial.velux.com/-/media/vms/about/modern-slavery-act/modern slavery statement 2022.pdf" target="_self" media>Modern Slavery Act Statement</a> </li> </ul>  <ul class="footer-nav-4"> <li class="menu-title"> Contact </li> <div class="address"> <a href="/contact-us/project-support">Project Support</a><br /> <a href="/contact-us/get-price-estimate">Get a Price Estimate</a><br /> <a href="/contact-us/technical-support">Technical Support</a><br /> <a href="/contact-us/complaint">Complaint</a><span style="font-size: 14px; line-height: 3rem; color: #d5eaf9;"><br /> <br /> VELUX Company Ltd.<br /> VELUX Commercial<br /> Woodside Way<br /> Glenrothes<br /> Fife<br /> Scotland<br /> KY7 4ND<br /> <br /> VELUX Commercial Xtralite Ltd.<br /> Spencer Road<br /> Blyth Riverside Business Park<br /> Blyth, Northumberland<br /> NE24 5TG<br /> <br /> E-mail: <a href="mailto:sales@veluxcommercial.co.uk">sales@veluxcommercial.co.uk</a><br /> <br /> Find us here: </span> </div> <li> <div class="social-icons"> <a target="_blank" href="https://www.linkedin.com/showcase/velux-commercial/"> <img alt="LinkedIn logo" src="//afd-commercial.velux.com/-/media/marketing/master/social icons/linkedin.png?la=en&h=42&w=42" style="height: 42px; width: 42px; margin-top: 7px; margin-right: 15px; margin-left: 0px;" /></a><a target="_blank" href="https://www.youtube.com/channel/UCPWkgm34KPDgSnYK4-6_hrg"> <img alt="YouTube logo" src="//afd-commercial.velux.com/-/media/vms/logo/social-media/youtube.png?la=en&h=42&w=42" style="height: 42px; width: 42px; margin-top: 7px; margin-right: 15px;" /></a> <a target="_blank" href="https://www.instagram.com/veluxcommercial/"> <img alt="Instagram logo" src="//afd-commercial.velux.com/-/media/vms/logo/social-media/instagram.png?la=en&h=42&w=42" style="height: 42px; width: 42px; margin-top: 7px; margin-right: 15px;" /></a> </div> </li> </ul> </div> </nav> <div class="payoff clearfix"> <div class="container_12"> <div class="grid_6 prefix_6"> </div> </div> </div> </footer> <div id="hdDevicesContainer"><input type="hidden" name="Default" id="Default" value="default" /><input type="hidden" name="Mobile" id="Mobile" value="767" /><input type="hidden" name="Tablet" id="Tablet" value="959" /><input type="hidden" name="Desktop" id="Desktop" value="960" /></div></form> <script defer src="//afd-commercial.velux.com/script/marketing/vms/library/min/baguettebox.min.js?key=171680101273287"></script> <script src="//code.jquery.com/jquery-3.6.3.min.js"></script> <script src="//afd-commercial.velux.com/script/marketing/js/min/common.min.js?key=171680100952249"></script> <script defer src="//afd-commercial.velux.com/script/marketing/vms/dist/js/vmscomponents.js?key=171680101335961"></script> <script defer src="//afd-commercial.velux.com/script/globals/vanillalazyload.js?key=171680100112606"></script> <script defer src="//afd-commercial.velux.com/script/marketing/js/min/initilaizejavascriptcomponents.min.js?key=171680100962614"></script> <script async src="https://kit.fontawesome.com/686777ed6d.js" crossorigin="anonymous"></script> <input type="hidden" value="en"> <script type="application/ld+json"> { "@context": "https://schema.org", "@type": "Article", "headline": "Understanding Skylight Energy Performance: What is the U-value, the G-value and Energy Balance?", "image": "//afd-commercial.velux.com/-/media/vms/blog/building-design/skylight-energy-performance/6555568universityoflyonfrance.jpg", "datePublished": "2024-12-09T09:56:43+00:00", //FORMAT: 2015-02-05T08:00:00+08:00 "publisher": { "@type": "Organization", "name": "VELUX Commercial", "contactPoint": [{ "@type": "ContactPoint", "telephone": "", "email": "", "contactType": "" } ], "logo": { "@type": "ImageObject", "url": "//afd-commercial.velux.com/-/media/vms/logo/velux-commercial-logo-2.png" }, "url": "https://commercial.velux.co.uk", // https://commercial.velux.xx "sameAs": [ "https://www.linkedin.com/showcase/velux-commercial/", "https://www.youtube.com/channel/UCPWkgm34KPDgSnYK4-6_hrg", "https://www.instagram.com/veluxcommercial/" ] }, "author": { "@type": "Organization", "name": "VELUX Commercial", "url": "" // About Us Page } } </script> </body> </html>

CINXE.COM

VELUX Commercial Blog | VELUX Commercial