1.0Design Buy Buildhttps://designbuybuild.co.ukJamie Bullockhttps://designbuybuild.co.uk/author/jamie/rich600338<blockquote class="wp-embedded-content" data-secret="4ftrCbyQmO"><a href="https://designbuybuild.co.uk/cascade-ventilation-an-innovative-way-to-ventilate-efficiently/">Cascade ventilation, an innovative way to ventilate efficiently</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://designbuybuild.co.uk/cascade-ventilation-an-innovative-way-to-ventilate-efficiently/embed/#?secret=4ftrCbyQmO" width="600" height="338" title="“Cascade ventilation, an innovative way to ventilate efficiently” — Design Buy Build" data-secret="4ftrCbyQmO" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /*! This file is auto-generated */ !function(c,l){"use strict";var e=!1,o=!1;if(l.querySelector)if(c.addEventListener)e=!0;if(c.wp=c.wp||{},c.wp.receiveEmbedMessage);else if(c.wp.receiveEmbedMessage=function(e){var t=e.data;if(!t);else if(!(t.secret||t.message||t.value));else if(/[^a-zA-Z0-9]/.test(t.secret));else{for(var r,s,a,i=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),n=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),o=0;o<n.length;o++)n[o].style.display="none";for(o=0;o<i.length;o++)if(r=i[o],e.source!==r.contentWindow);else{if(r.removeAttribute("style"),"height"===t.message){if(1e3<(s=parseInt(t.value,10)))s=1e3;else if(~~s<200)s=200;r.height=s}if("link"===t.message)if(s=l.createElement("a"),a=l.createElement("a"),s.href=r.getAttribute("src"),a.href=t.value,a.host===s.host)if(l.activeElement===r)c.top.location.href=t.value}}},e)c.addEventListener("message",c.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",t,!1),c.addEventListener("load",t,!1);function t(){if(o);else{o=!0;for(var e,t,r,s=-1!==navigator.appVersion.indexOf("MSIE 10"),a=!!navigator.userAgent.match(/Trident.*rv:11\./),i=l.querySelectorAll("iframe.wp-embedded-content"),n=0;n<i.length;n++){if(!(r=(t=i[n]).getAttribute("data-secret")))r=Math.random().toString(36).substr(2,10),t.src+="#?secret="+r,t.setAttribute("data-secret",r);if(s||a)(e=t.cloneNode(!0)).removeAttribute("security"),t.parentNode.replaceChild(e,t);t.contentWindow.postMessage({message:"ready",secret:r},"*")}}}}(window,document); </script> https://designbuybuild.co.uk/wp-content/uploads/2018/08/age-Gewerbebau-Frickenhausen-8-1030x687.jpg1030687Ventilation is critical for airtight buildings – we all know that. We also have heard from leading lights of indoor air quality research, such as Dr. Sterling Howieson, that the risk of black mould triples when dwellings are being insulated and made more airtight.