{"id":17564,"date":"2026-03-28T20:38:18","date_gmt":"2026-03-28T15:08:18","guid":{"rendered":"https:\/\/aluminiummagazine.com\/mag\/?p=17564"},"modified":"2026-05-09T14:25:16","modified_gmt":"2026-05-09T08:55:16","slug":"outward-vs-inward-casement-windows-airflow","status":"publish","type":"post","link":"https:\/\/aluminiummagazine.com\/mag\/windows\/outward-vs-inward-casement-windows-airflow.html","title":{"rendered":"Outward vs Inward Casement Windows: Which Opening Direction Is Better for Airflow?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">When selecting casement windows, most people focus on appearance, hardware, or building codes. However, one of the most important performance factors is often overlooked until after installation: <strong>ventilation performance and airflow.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The direction in which a casement window opens \u2014 inward or outward \u2014 can significantly affect how air enters a room. This is not just a design decision; it is part of the <strong>building\u2019s ventilation strategy.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The question is simple:<br><strong>Which casement window provides better airflow \u2014 outward opening or inward opening?<\/strong><\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>The Mechanics of Airflow<\/strong>: The \u201cScoop Effect\u201d<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Casement windows are different from sliding windows because the sash does not just create an opening \u2014 <strong>it interacts with the wind.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When wind hits a building facade and a casement window is open, the sash can either:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Catch and direct air into the room, or<\/li>\n\n\n\n<li>Deflect air away from the opening<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This phenomenon is often called the <strong>\u201cscoop effect\u201d<\/strong> or <strong>wind catcher effect<\/strong> in ventilation design.<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">1. <strong>Outward Opening Casement (The Wind Catcher)<\/strong><\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/aluminiummagazine.com\/mag\/wp-content\/uploads\/2026\/03\/outward-opening-aluminium-casement-window-1024x1024.jpg\" alt=\"Outward opening aluminium casement window open at 45 degrees\" class=\"wp-image-17565\" srcset=\"https:\/\/aluminiummagazine.com\/mag\/wp-content\/uploads\/2026\/03\/outward-opening-aluminium-casement-window-1024x1024.jpg 1024w, https:\/\/aluminiummagazine.com\/mag\/wp-content\/uploads\/2026\/03\/outward-opening-aluminium-casement-window-300x300.jpg 300w, https:\/\/aluminiummagazine.com\/mag\/wp-content\/uploads\/2026\/03\/outward-opening-aluminium-casement-window-150x150.jpg 150w, https:\/\/aluminiummagazine.com\/mag\/wp-content\/uploads\/2026\/03\/outward-opening-aluminium-casement-window-768x768.jpg 768w, https:\/\/aluminiummagazine.com\/mag\/wp-content\/uploads\/2026\/03\/outward-opening-aluminium-casement-window.jpg 1280w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><em>Outward opening casement window directing airflow into the room.<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">In outward opening casement windows, the sash swings to the exterior. When wind hits the building and the window is open, the sash acts like a <strong>scoop, sail, or wind catcher<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When opened around 90 degrees:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The sash creates a pressure difference<\/li>\n\n\n\n<li>Wind hits the sash surface<\/li>\n\n\n\n<li>Air is directed into the room<\/li>\n\n\n\n<li>Effective ventilation increases<\/li>\n\n\n\n<li>Cross ventilation improves<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Because of this, outward opening casement windows often provide <strong>higher effective airflow than inward opening or sliding windows of the same size.<\/strong><\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">This is why outward opening casement windows are often used in buildings designed for <strong>natural ventilation and passive cooling.<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">2. <strong>Inward Opening Casement (The Controlled Vent)<\/strong><\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/aluminiummagazine.com\/mag\/wp-content\/uploads\/2026\/03\/inward-opening-aluminium-casement-window-1024x1024.jpg\" alt=\"Inward opening aluminium casement window open into the room\" class=\"wp-image-17566\" srcset=\"https:\/\/aluminiummagazine.com\/mag\/wp-content\/uploads\/2026\/03\/inward-opening-aluminium-casement-window-1024x1024.jpg 1024w, https:\/\/aluminiummagazine.com\/mag\/wp-content\/uploads\/2026\/03\/inward-opening-aluminium-casement-window-300x300.jpg 300w, https:\/\/aluminiummagazine.com\/mag\/wp-content\/uploads\/2026\/03\/inward-opening-aluminium-casement-window-150x150.jpg 150w, https:\/\/aluminiummagazine.com\/mag\/wp-content\/uploads\/2026\/03\/inward-opening-aluminium-casement-window-768x768.jpg 768w, https:\/\/aluminiummagazine.com\/mag\/wp-content\/uploads\/2026\/03\/inward-opening-aluminium-casement-window.jpg 1280w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><em>Inward opening casement window open into interior space.<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">In inward opening casement windows, the sash swings into the room instead of outside.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">From an airflow perspective:<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The sash does not catch wind<\/li>\n\n\n\n<li>Incoming air must move around the sash<\/li>\n\n\n\n<li>Airflow becomes more turbulent<\/li>\n\n\n\n<li>The window behaves more like a simple opening rather than a wind catcher<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This means ventilation is still good, but usually <strong>lower than outward opening casement windows<\/strong> when wind direction is favorable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, inward opening windows are often preferred for <strong>safety, weather protection, and maintenance reasons<\/strong>, especially in multi-storey buildings.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Comparative Analysis<\/strong>: <em>Location Dictates Choice<\/em><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Choosing between inward and outward opening casement windows is not only about airflow. It is about <strong>airflow, safety, weather exposure, and building type.<\/strong><\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Location \/ Priority<\/th><th class=\"has-text-align-center\" data-align=\"center\">Recommended Opening<\/th><th>Rationale<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Independent House \/ Villa<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">Outward Opening<\/td><td>Maximizes the wind catcher effect; no exterior obstructions.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>High-Rise Apartment<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Inward Opening<\/strong><\/td><td>Outward sashes face strong wind pressure at height; inward is safer and commonly used.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>High Wind Areas<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">Outward Opening<\/td><td>The sash can capture wind and improve ventilation when positioned correctly.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Heavy Rain Areas<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Inward Opening<\/strong><\/td><td>Rain is less likely to be blown inside past the seals.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Exterior Security Grills<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Inward Opening<\/strong><\/td><td>Outward sash cannot open if grills are installed outside.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Ventilation Priority<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">Outward Opening<\/td><td>Highest airflow and air exchange rate.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Safety &amp; Cleaning<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Inward Opening<\/strong><\/td><td>Easier and safer to clean from inside.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">This table summarizes a simple industry rule:<br><strong>Outward opening for ventilation, inward opening for safety and practicality.<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>The Aluminium Advantage<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Regardless of whether the window opens inward or outward, the <strong>frame material<\/strong> plays a major role in ventilation efficiency. Aluminum casement windows are often preferred for high-performance ventilation systems for two important reasons.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Slender Profiles<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Aluminum frames can be much slimmer than uPVC or timber frames. Slim frames mean:<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Larger glass area<\/li>\n\n\n\n<li>Larger clear opening area<\/li>\n\n\n\n<li>Less frame obstruction<\/li>\n\n\n\n<li>More space for air to pass through<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This increases the <strong>effective airflow area<\/strong> of the window.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Strong Hinges and Hardware<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Casement window airflow performance depends heavily on how far and how stable the sash can open.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">High-quality aluminum window systems:<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Support heavier sashes<\/li>\n\n\n\n<li>Maintain alignment over time<\/li>\n\n\n\n<li>Allow opening angles like 45\u00b0, 90\u00b0, or even 135\u00b0<\/li>\n\n\n\n<li>Hold position firmly without sagging<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This is important because airflow changes significantly depending on the <strong>opening angle relative to wind direction.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So in many cases, aluminum casement windows provide <strong>better long-term ventilation performance<\/strong> due to stronger hardware and larger clear openings.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><em>Final Conclusion<\/em>: <\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Which Casement Window Has Better Airflow?<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">If the only factor is <strong>maximum airflow and ventilation<\/strong>, then:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Outward opening <a href=\"https:\/\/aluminiummagazine.com\/mag\/windows\/aluminium-casement-windows.html\" data-type=\"post\" data-id=\"1411\">casement windows<\/a> generally provide better airflow because the sash can catch and direct wind into the room.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, the best choice depends on the building type and environment.<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Simple Decision Rule<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Choose <strong>Outward Opening<\/strong> for maximum ventilation and low-rise buildings.<\/li>\n\n\n\n<li>Choose <strong>Inward Opening<\/strong> for high-rise buildings, safety, and weather protection.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In good building design, window opening direction is not random.<br>It is part of the <strong>overall ventilation and building performance strategy.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A small hinge decision can make a big difference in how comfortable a building feels.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\"><strong>Yo May Like to Read:<\/strong><\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-aluminium-magazine wp-block-embed-aluminium-magazine\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"QpzbMAJVze\"><a href=\"https:\/\/aluminiummagazine.com\/mag\/windows\/house-aluminium-windows.html\">Replacing Your House Windows? 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Single, Double or Triple Glazed&#8221; &#8212; Aluminium Magazine\" src=\"https:\/\/aluminiummagazine.com\/mag\/windows\/aluminium-casement-windows-glazing-guide.html\/embed#?secret=cWopjrPOBi#?secret=3QAcWTsMFu\" data-secret=\"3QAcWTsMFu\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-aluminium-magazine wp-block-embed-aluminium-magazine\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"yg3z4GS8O1\"><a href=\"https:\/\/aluminiummagazine.com\/mag\/windows\/normal-aluminium-window-vs-thermal-break-soundproof-window.html\">Standard Aluminum vs Soundproof Windows: Which Cuts More Noise &amp; Costs?<\/a><\/blockquote><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;Standard Aluminum vs Soundproof Windows: Which Cuts More Noise &amp; Costs?&#8221; &#8212; Aluminium Magazine\" src=\"https:\/\/aluminiummagazine.com\/mag\/windows\/normal-aluminium-window-vs-thermal-break-soundproof-window.html\/embed#?secret=8jROGEfKHX#?secret=yg3z4GS8O1\" data-secret=\"yg3z4GS8O1\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n<\/div>\n<\/div>\n<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div><script>document.addEventListener(\"DOMContentLoaded\",function(){\n        if(window.innerWidth <= 768){\n            if (\"immediate\" === \"delay\") {\n                setTimeout(function(){document.querySelectorAll(\".pai-ad\").forEach(el=>el.style.visibility=\"visible\")},0);\n            } else if (\"immediate\" === \"scroll\") {\n                window.addEventListener(\"scroll\",function(){\n                    let s=window.scrollY\/(document.body.scrollHeight-window.innerHeight);\n                    if(s>0.1){\n                        document.querySelectorAll(\".pai-ad\").forEach(el=>el.style.visibility=\"visible\");\n                    }\n                });\n            } else {\n                document.querySelectorAll(\".pai-ad\").forEach(el=>el.style.visibility=\"visible\");\n            }\n        } else {\n            document.querySelectorAll(\".pai-ad\").forEach(el=>el.remove());\n        }\n    });<\/script>","protected":false},"excerpt":{"rendered":"<p>When selecting casement windows, most people focus on appearance, hardware, or building codes. However, one of the most important performance factors is often overlooked until after installation: ventilation performance and airflow. The direction in which a casement window opens \u2014 inward or outward \u2014 can significantly affect how air enters a room. This is not &#8230; <a title=\"Outward vs Inward Casement Windows: Which Opening Direction Is Better for Airflow?\" class=\"read-more\" href=\"https:\/\/aluminiummagazine.com\/mag\/windows\/outward-vs-inward-casement-windows-airflow.html\" aria-label=\"Read more about Outward vs Inward Casement Windows: Which Opening Direction Is Better for Airflow?\">Read more<\/a><\/p>\n","protected":false},"author":12,"featured_media":18234,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[45],"tags":[],"class_list":["post-17564","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-windows"],"_links":{"self":[{"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/posts\/17564","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/comments?post=17564"}],"version-history":[{"count":1,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/posts\/17564\/revisions"}],"predecessor-version":[{"id":18236,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/posts\/17564\/revisions\/18236"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/media\/18234"}],"wp:attachment":[{"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/media?parent=17564"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/categories?post=17564"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/tags?post=17564"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}