{"id":12907,"date":"2025-02-03T09:01:48","date_gmt":"2025-02-03T09:01:48","guid":{"rendered":"https:\/\/www.diquigiovanni.com\/news\/infissi-risparmio-energetico-migliorare-efficienza\/"},"modified":"2025-02-03T09:24:40","modified_gmt":"2025-02-03T09:24:40","slug":"energy-saving-windows-improve-efficiency","status":"publish","type":"post","link":"https:\/\/www.diquigiovanni.com\/en\/blog\/energy-saving-windows-improve-efficiency\/","title":{"rendered":"Energy-Saving Windows: how to improve your home\u2019s efficiency"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"perche-si-forma-la-muffa-in-casa\">How to assess your house\u2019s energy efficiency<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Energy efficiency depends on various <strong>factors that determine a building&#8217;s energy consumption and environmental impact<\/strong>. The main elements to analyze include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>the condition and type of <strong>heating and cooling systems<\/strong>;<\/li>\n\n\n\n<li>thermal insulation of the <strong>roof<\/strong>, <strong>walls<\/strong> (exterior wall cladding), <strong>floors<\/strong> and <strong>windows<\/strong>;<\/li>\n\n\n\n<li>the presence of systems for generating <strong>renewable energy<\/strong> (e.g. photovoltaic systems).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Based on the data collected, <strong>the building is rated on a scale from A4<\/strong> (very efficient) <strong>to G<\/strong> (inefficient) in a document known as the <strong>Energy Performance Certificate (EPC)<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Even windows and doors are certified for energy efficiency<\/strong>, through a label that assigns them <strong>a grade from A to G<\/strong>. This classification, regulated by specific standards, helps select the solutions most suitable for the climate in your area.<\/p>\n\n\n\n<div  class=\"blocco-spacing spacing-xs\" ><\/div>\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"418\" src=\"https:\/\/www.diquigiovanni.com\/wp-content\/uploads\/2025\/01\/classe-energetica-documentazione.jpg\" alt=\"\" class=\"wp-image-12856\" srcset=\"https:\/\/www.diquigiovanni.com\/wp-content\/uploads\/2025\/01\/classe-energetica-documentazione.jpg 1024w, https:\/\/www.diquigiovanni.com\/wp-content\/uploads\/2025\/01\/classe-energetica-documentazione-300x122.jpg 300w, https:\/\/www.diquigiovanni.com\/wp-content\/uploads\/2025\/01\/classe-energetica-documentazione-768x314.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<div  class=\"blocco-spacing spacing-m\" ><\/div>\n\n\n<h2 class=\"wp-block-heading\">How much do windows and doors impact savings?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A great deal: drafty windows and thermal bridges<\/strong> are among the primary causes of high energy consumption and costly bills. <strong>Windows and doors alone can account for up to 40% of a <a href=\"https:\/\/www.diquigiovanni.com\/en\/blog\/ideal-home-temperature-window-frames\/\">home&#8217;s thermal energy loss<\/a>!<\/strong> Now it\u2019s surely clear how windows and doors are one of the most important factors to consider when discussing energy efficiency.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Outdated, poor-quality, or improperly installed windows and doors promote the formation of thermal bridges<\/strong>, nullifying all of the energy-saving efforts, causing significant heat loss in winter and increasing overheating in summer.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>When aiming to improve your home\u2019s energy efficiency<\/strong>, it\u2019s important to consider <a href=\"https:\/\/www.diquigiovanni.com\/en\/blog\/doors-windows-replacement-10-questions\/\">replacing existing windows<\/a> with <strong>new, high-performance models.<\/strong> These advanced solutions provide<strong> excellent insulation<\/strong>, ensuring energy savings in every season.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Installing new <strong>high-energy efficient windows<\/strong> guarantees these benefits:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>the elimination of drafts, thermal bridges <\/strong>and improved insulation;<\/li>\n\n\n\n<li><strong>reduced energy consumption<\/strong>, and thus lower heating costs;<\/li>\n\n\n\n<li><strong>a higher energy classification<\/strong> on the building&#8217;s Energy Performance Certificate.<\/li>\n<\/ul>\n\n\n\n<div  class=\"blocco-spacing spacing-xs\" ><\/div>\n\n\n<a class=\" btn [ link-colonna link-colonna-1 ] \" href=\"https:\/\/www.diquigiovanni.com\/en\/products\/\" target=\"_self\" rel=\"noopener\">\n            <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"22.842\" height=\"15.748\" viewBox=\"0 0 22.842 15.748\">\n                <g id=\"Group_248\" data-name=\"Group 248\" transform=\"translate(0 0.365)\">\n                    <path id=\"Path_106\" data-name=\"Path 106\" d=\"M-11.24,0-3.2,7.509l-8.035,7.509M-3.2,7.509h-22.11\" transform=\"translate(25.315)\" fill=\"none\" stroke=\"#193153\" stroke-width=\"1\"><\/path>\n                <\/g>\n                <\/svg>\n            <span class=\"ms-2\">Discover DQG energy-efficient doors and windows<\/span>\n        <\/a>\n\n\n\n<div  class=\"blocco-spacing spacing-m\" ><\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"limportanza-di-arieggiare-gli-ambienti-domestici\">Tax deductions for energy-saving windows in Italy<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>In Italy, in 2025<\/strong>, those who decide to replace old windows with more efficient models can benefit from <strong>two main tax incentives: the Renovation Bonus and the Ecobonus<\/strong>. Both incentives allow homeowners to <strong>recover part of the expenses incurred for the purchase and installation of new windows<\/strong>, but they differ in terms of scope and spending limits.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If interested, you can read more about it here (in Italian): <strong><a href=\"https:\/\/www.diquigiovanni.com\/news\/detrazione-fiscale-2025\/\">Detrazioni Fiscali 2025<\/a><\/strong>.<\/p>\n\n\n\n<div  class=\"blocco-spacing spacing-s\" ><\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"cose-la-microventilazione-e-come-funziona\">How to choose high energy efficient windows?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Energy-saving doors and windows<\/strong> are designed to provide <strong>excellent thermal and <a href=\"https:\/\/www.diquigiovanni.com\/en\/blog\/acoustic-insulation-soundproof-windows\/\">acoustic insulation<\/a><\/strong>, reducing heat loss and improving energy savings.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>But what parameters define the efficiency of a window in practice?<\/strong> Simply put, there are a set of technical specifications regarding a door or window&#8217;s ability to insulate the indoor environment, reduce energy consumption and ensure living comfort.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Of course, <strong>the choice of door and window frames should be tailored <\/strong>to the specific needs of the project, so it\u2019s advisable to <strong>rely on <a href=\"https:\/\/www.diquigiovanni.com\/en\/company\/\/\" data-type=\"link\" data-id=\"https:\/\/www.diquigiovanni.com\/en\/company\/\/\">companies with a solid expertise<\/a><\/strong>.<\/p>\n\n\n\n<div  class=\"blocco-spacing spacing-xs\" ><\/div>\n\n\n<p class=\"h3 wp-block-paragraph\">1. Thermal transmittance (Uw)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It measures the <strong>heat flow that passes through the window<\/strong> under stable conditions, expressed in<strong> W\/m\u00b2K<\/strong> (Watts per square meter Kelvin). This parameter depends primarily on the <a href=\"https:\/\/www.diquigiovanni.com\/en\/blog\/window-frame-materials-upvc-aluminium-wood\/\">frame materials<\/a>, the transmittance of the glass, and the spacer between the glass panes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Lower values indicate better thermal insulation<\/strong>: for example, a Uw of 1.0 W\/m\u00b2K is much more efficient than 2.5 W\/m\u00b2K. For windows with good energy efficiency, a value of<strong> \u2264 1.4 W\/m\u00b2K<\/strong> is recommended, while highly energy-efficient frames should have <strong>\u2264 1.0 W\/m\u00b2K<\/strong>.<\/p>\n\n\n\n<div  class=\"blocco-spacing spacing-xs\" ><\/div>\n\n\n<p class=\"h3 wp-block-paragraph\">2. Solar factor (g)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It indicates the <strong>amount of solar energy<\/strong> that the window allows to enter inside, expressed as a percentage (%).<strong> High values (50-70%)<\/strong> are recommended for cold climates to gain solar heat, while <strong>low values (20-40%)<\/strong> are preferable in hot climates to reduce overheating.<\/p>\n\n\n\n<div  class=\"blocco-spacing spacing-xs\" ><\/div>\n\n\n<p class=\"h3 wp-block-paragraph\">3. Acoustic insulation (Rw)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It measures the window\u2019s ability to<strong> reduce external noise<\/strong>, expressed in <strong>dB<\/strong> (decibels). <strong>Higher values indicate better acoustic insulation<\/strong>: for example, a window with<strong> Rw \u2265 40 dB<\/strong> is ideal for particularly noisy areas and ensures optimal soundproofing.<\/p>\n\n\n\n<div  class=\"blocco-spacing spacing-xs\" ><\/div>\n\n\n<p class=\"h3 wp-block-paragraph\">4. Air tightness<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It classifies the window&#8217;s ability to <strong>prevent air infiltration under pressure<\/strong>, on <strong>a scale from 1 <\/strong>(low tightness) <strong>to 4 <\/strong>(maximum tightness). Doors and windows with a high air tightness are crucial to avoid heat loss and maintain a constant indoor temperature.<\/p>\n\n\n\n<div  class=\"blocco-spacing spacing-xs\" ><\/div>\n\n\n<p class=\"h3 wp-block-paragraph\">5. Water tightness<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It indicates the window\u2019s ability to <strong>resist water infiltration <\/strong>during heavy rain or strong winds. It is <strong>classified<\/strong> <strong>from 1A <\/strong>(minimum resistance) <strong>to 9A<\/strong> (maximum resistance).<\/p>\n\n\n\n<div  class=\"blocco-spacing spacing-xs\" ><\/div>\n\n\n<p class=\"h3 wp-block-paragraph\">6. Wind resistance<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This measures the window&#8217;s ability to<strong> withstand wind pressure <\/strong>without deforming or losing its properties, <strong>classified from A1<\/strong> (low resistance) <strong>to C5<\/strong> (maximum resistance).<\/p>\n\n\n\n<div  class=\"blocco-spacing spacing-xs\" ><\/div>\n\n\n<p class=\"h3 wp-block-paragraph\">7. Glass types<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The window glazing significantly affects its energy performance. <strong>Energy efficient window glass (Low-E) <\/strong>reduces heat loss and improves thermal insulation; additionally, installing <strong>double- or triple-glazed windows<\/strong> enhances both thermal and acoustic insulation, due to the presence of gaps filled with<strong> insulating gases (such as argon)<\/strong>.<\/p>\n\n\n\n<div  class=\"blocco-spacing spacing-xs\" ><\/div>\n\n\n<p class=\"h3 wp-block-paragraph\">8. Frame materials<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The construction materials influence both thermal insulation and the durability of doors and windows. <strong>uPVC frames<\/strong> provide excellent performance with <a href=\"https:\/\/www.diquigiovanni.com\/en\/blog\/doors-windows-cleaning-maintenance\/\">minimal maintenance and cleaning<\/a>; <strong>wooden frames<\/strong> offer natural insulation but require more care; finally, <strong>thermal break aluminium frames<\/strong> are ideal for both strength and longevity.<\/p>\n\n\n\n<div  class=\"blocco-spacing spacing-xs\" ><\/div>\n\n\n<p class=\"h3 wp-block-paragraph\">9. Thermal spacers (Warm-edge)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These are <strong>profiles placed between the panes of glass in double or triple glazing<\/strong>, to separate them and improve the overall thermal insulation of the window. Their presence <strong>reduces heat loss along the edge of the glass<\/strong>, minimizing thermal bridges.<\/p>\n\n\n\n<div  class=\"blocco-spacing spacing-xs\" ><\/div>\n\n\n<p class=\"h3 wp-block-paragraph\">10. Transparency and Light Transmittance (Lt)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It measures the <strong>amount of natural light that passes through the window<\/strong>, which is crucial for visual comfort inside the home.<strong> High values improve indoor brightness<\/strong>, reducing the need for artificial lighting and its associated energy consumption.<\/p>\n\n\n\n<div  class=\"blocco-spacing spacing-xs\" ><\/div>\n\n\n<p class=\"h3 wp-block-paragraph\">11. Quality certifications<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ad esempio la <strong>marcatura CE per gli infissi<\/strong>, che garantisce la piena conformit\u00e0 alle normative europee, e la <strong><a href=\"https:\/\/posaclima.it\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">certificazione PosaClima<\/a><\/strong>, riconosciuta a livello nazionale per la qualit\u00e0 dei materiali costruttivi e l\u2019installazione con esperti specializzati.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For example, the <strong>CE marking for window and door<\/strong> <strong>frames<\/strong> ensures full compliance with European regulations, and the <strong><a href=\"https:\/\/posaclima.it\/\" target=\"_blank\" data-type=\"link\" data-id=\"https:\/\/posaclima.it\/\" rel=\"noreferrer noopener nofollow\">PosaClima certification<\/a><\/strong>, recognized nationally in Italy for the quality of construction materials and expert installation.<\/p>\n\n\n\n<div  class=\"blocco-spacing spacing-xs\" ><\/div>\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"418\" src=\"https:\/\/www.diquigiovanni.com\/wp-content\/uploads\/2025\/01\/qualita-serramenti-efficienza-energetica.jpg\" alt=\"\" class=\"wp-image-12863\" srcset=\"https:\/\/www.diquigiovanni.com\/wp-content\/uploads\/2025\/01\/qualita-serramenti-efficienza-energetica.jpg 1024w, https:\/\/www.diquigiovanni.com\/wp-content\/uploads\/2025\/01\/qualita-serramenti-efficienza-energetica-300x122.jpg 300w, https:\/\/www.diquigiovanni.com\/wp-content\/uploads\/2025\/01\/qualita-serramenti-efficienza-energetica-768x314.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<div  class=\"blocco-spacing spacing-m\" ><\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"scopri-gli-infissi-dqg-con-microventilazione\">DQG: windows and doors for high energy performances<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Choosing DQG means opting for the best: <a href=\"https:\/\/www.diquigiovanni.com\/en\/certifications\/\" data-type=\"link\" data-id=\"https:\/\/www.diquigiovanni.com\/en\/certifications\/\">all our certifications<\/a><\/strong> are not only a guarantee of <strong>products\u2019 quality <\/strong>but also of<strong> flawless installation<\/strong>, carried out with innovative materials that ensure optimal insulation and complete elimination of thermal loss or infiltrations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With our <strong><a href=\"https:\/\/www.diquigiovanni.com\/en\/products\/\">Made in Italy doors and windows<\/a><\/strong>, you can rely on:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Qualified installation<\/strong>: DQG technicians have earned the title of <em>&#8220;PosaClima Expert Installer and Window Opening Renovation Technician&#8221;<\/em> after completing specialized training courses, ensuring precise and certified installation.<\/li>\n\n\n\n<li><strong>10-year warranty<\/strong>: installation of doors and windows with the PosaClima Premium Plus system is backed by a 10-year warranty, ensuring the full functionality of the frames and long-lasting performances without compromise.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Find out more <a href=\"https:\/\/www.diquigiovanni.com\/en\/company\/\" data-type=\"link\" data-id=\"https:\/\/www.diquigiovanni.com\/en\/company\/\">about our company<\/a> <\/strong>and <strong>explore the<\/strong> <strong><a href=\"https:\/\/www.diquigiovanni.com\/en\/products\/\">DQG product range<\/a><\/strong>!<\/p>\n\n\n\n<div  class=\"blocco-spacing spacing-s\" ><\/div>\n\n\n<a class=\" btn [ link-colonna link-colonna-1 ] \" href=\"https:\/\/www.diquigiovanni.com\/en\/private\/\" target=\"_self\" rel=\"noopener\">\n            <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"22.842\" height=\"15.748\" viewBox=\"0 0 22.842 15.748\">\n                <g id=\"Group_248\" data-name=\"Group 248\" transform=\"translate(0 0.365)\">\n                    <path id=\"Path_106\" data-name=\"Path 106\" d=\"M-11.24,0-3.2,7.509l-8.035,7.509M-3.2,7.509h-22.11\" transform=\"translate(25.315)\" fill=\"none\" stroke=\"#193153\" stroke-width=\"1\"><\/path>\n                <\/g>\n                <\/svg>\n            <span class=\"ms-2\">Contact us for a consultation on your new windows<\/span>\n        <\/a>\n\n\n\n<div  class=\"blocco-spacing spacing-m\" ><\/div>","protected":false},"excerpt":{"rendered":"<p>When it comes to energy efficiency, new windows and doors play a fundamental role.<\/p>\n","protected":false},"author":1,"featured_media":12860,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"pgc_sgb_lightbox_settings":"","footnotes":""},"categories":[44],"tags":[],"class_list":["post-12907","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.diquigiovanni.com\/en\/wp-json\/wp\/v2\/posts\/12907","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.diquigiovanni.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.diquigiovanni.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.diquigiovanni.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.diquigiovanni.com\/en\/wp-json\/wp\/v2\/comments?post=12907"}],"version-history":[{"count":0,"href":"https:\/\/www.diquigiovanni.com\/en\/wp-json\/wp\/v2\/posts\/12907\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.diquigiovanni.com\/en\/wp-json\/wp\/v2\/media\/12860"}],"wp:attachment":[{"href":"https:\/\/www.diquigiovanni.com\/en\/wp-json\/wp\/v2\/media?parent=12907"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.diquigiovanni.com\/en\/wp-json\/wp\/v2\/categories?post=12907"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.diquigiovanni.com\/en\/wp-json\/wp\/v2\/tags?post=12907"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}