1.0Certechhttps://www.certech.be/en/produwebhttps://www.certech.be/en/author/produweb/rich600338<blockquote class="wp-embedded-content" data-secret="Mcd288SC0c"><a href="https://www.certech.be/en/expertise/environment/health-safety/indoor-air-quality/">Indoor air quality</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.certech.be/en/expertise/environment/health-safety/indoor-air-quality/embed/#?secret=Mcd288SC0c" width="600" height="338" title="“Indoor air quality” — Certech" data-secret="Mcd288SC0c" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://www.certech.be/wp-includes/js/wp-embed.min.js </script> https://www.certech.be/files/uploads/2021/07/certech-environnement-2.jpg19201275[vc_row equal_height=”yes”][vc_column][vc_column_text] We are all heavily exposed to indoor air, as we spend almost 90% of our time in confined spaces, such as buildings or transports. Moreover, many recent scientific studies show that indoor air is often more polluted than the outdoor air, even in an urban environment. The two main reasons are the presence