{"id":96501,"date":"2021-07-20T11:20:20","date_gmt":"2021-07-20T10:20:20","guid":{"rendered":"https:\/\/www.pbctoday.co.uk\/news\/?p=96501"},"modified":"2021-07-20T11:20:20","modified_gmt":"2021-07-20T10:20:20","slug":"improving-indoor-air-quality","status":"publish","type":"post","link":"https:\/\/www.pbctoday.co.uk\/news\/building-control-news\/improving-indoor-air-quality\/96501\/","title":{"rendered":"Mechanical ventilation\u2019s role in improving indoor air quality"},"content":{"rendered":"<h2>With concerns over indoor virus transmission and the health impacts of air pollution, as well as condensation, mould and overheating, ventilation has become a key concern in our buildings. Paul Williams of <a href=\"https:\/\/www.domusventilation.co.uk\/\" target=\"_blank\" rel=\"noopener noreferrer\">Domus Ventilation<\/a> looks at how to improve indoor air quality<\/h2>\n<p>Ventilation has progressed from the primary concerns around condensation and mould prevention to reducing overheating in the more airtight new homes as we began to build in response to the <a href=\"https:\/\/www.gov.uk\/government\/publications\/2010-to-2015-government-policy-energy-efficiency-in-buildings\/2010-to-2015-government-policy-energy-efficiency-in-buildings#:~:text=The%20code%20for%20sustainable%20homes%20is%20the%20national%20standard%20for,out%20by%20the%20building%20regulations.\" target=\"_blank\" rel=\"noopener noreferrer\">Code for Sustainable Homes<\/a> through to addressing the issue of harmful indoor air pollution. Most recently, ventilation is being talked about in the light of reducing virus transmission.<\/p>\n<h3>Ventilation and coronavirus<\/h3>\n<p>Coronavirus is primarily spread in indoor environments by people breathing in infected droplets and smaller &#8220;aerosol&#8221; particles in the air that have been exhaled from the nose and mouth of an infected person. While masks help to limit the spread of these droplets, <a href=\"https:\/\/www.pbctoday.co.uk\/news\/building-control-news\/ventilation-buildings\/96344\/\" target=\"_blank\" rel=\"noopener noreferrer\">good ventilation is essential<\/a> to disperse them.<\/p>\n<p>A short film released by the <a href=\"https:\/\/www.gov.uk\/government\/organisations\/department-of-health-and-social-care\" target=\"_blank\" rel=\"noopener noreferrer\">Department of Health &amp; Social Care<\/a> in November 2020 shows how ventilation can reduce the risk of infection from Coronavirus by over 70%, as fresh air dilutes the particles. The video focuses on natural ventilation through opening windows, but also acknowledges the role mechanical ventilation systems have to play when used correctly and regularly.<\/p>\n<h3>The benefits of mechanical ventilation in reducing transmission<\/h3>\n<p>While extract fans in bathrooms and kitchens provide a basic level of ventilation and are low in cost, they are only one step above opening a window. For a more effective solution that ensures fresh air reaches all rooms in a home and pollutants are directly extracted without losing costly heat from the property, whole house mechanical ventilation solutions can\u2019t be beaten, especially if you opt for <a href=\"https:\/\/www.pbctoday.co.uk\/news\/building-control-news\/ventilation-cuts-covid-risk\/93214\/\" target=\"_blank\" rel=\"noopener noreferrer\">a Mechanical Ventilation with Heat Recovery (MVHR) system<\/a>.<\/p>\n<p>MVHR combines supply and extract ventilation in one system. They work on the principle of extracting and reusing waste heat from &#8220;wet rooms&#8221; (kitchens, bathrooms, utility spaces). They efficiently pre-warm the fresh air drawn into the building with waste stale air using a heat exchanger. The filtered, pre-warmed air is then distributed around the home, effectively meeting part of the heating load in energy efficient dwellings.<\/p>\n<p>MVHR systems provide effective ventilation, are energy efficient and extremely effective at reducing the risk of virus transmission, condensation and cold air draughts.<\/p>\n<p>A lower cost, easier to install alternative to MVHR, Mechanical Extract Ventilation (MEV) systems are also available. These actively extract air from wet rooms via ducting to a central ventilation unit, which exhausts to the atmosphere. The systems are typically two-speed, providing low-speed continuous trickle ventilation and high-speed boost flow. Replacement fresh air is drawn into the property via background ventilators located in the habitable rooms and through air leakage.<\/p>\n<p>Both types of system have been recognised by the <a href=\"https:\/\/www.who.int\/\" target=\"_blank\" rel=\"noopener noreferrer\">World Health Organisation<\/a> (WHO) as providing a line of defence against the spread of coronavirus.<\/p>\n<p>Because of the nature of these systems, which require extensive ducting, they are mostly suited to new build properties.<\/p>\n<h3>Lest we forget: Air pollution<\/h3>\n<p>Ventilation in our homes has never been more important but it would be a mistake to focus solely on coronavirus as the only threat to our health. We have been in the midst of a health crisis for some time caused by pollution in the air we breathe.<\/p>\n<p>According to NHS England, 30% of preventable deaths in England are due to non-communicable diseases specifically attributed to air pollution. This has been sadly brought to the fore by the recent recognition of air pollution as a cause of a person&#8217;s death for the very first time in the UK, and possibly the world.<\/p>\n<p>Air pollution, notably PM2.5 and NOx, are the key concerns here, with the key emissions source being domestic fossil fuel burning and transport respectively. PM2.5 and NOx particles easily enter our homes around closed doors, which is where our exposure to air pollution mostly happens as we typically spend 90% of our time indoors. With coronavirus lockdown periods, this figure has increased, along with the risk to our health.<\/p>\n<p>Indoor air pollution sources are also problematic and widespread, and vary dramatically from house to house. Sources include cooking, cleaning, fires, candles and even building and decorating materials.<\/p>\n<p>For reducing indoor air pollutants, experts agree that both source removal and ventilation are key.<\/p>\n<p>We have already looked at how whole-house mechanical ventilation systems work and how effective they are in distributing fresh air throughout the home. But in more polluted areas, such as cities, bringing air into the home also brings in dangerous pollutants, especially if the property is located near a busy road.<\/p>\n<figure id=\"attachment_96507\" aria-describedby=\"caption-attachment-96507\" style=\"width: 572px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-96507\" src=\"https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2021\/07\/NOX-FILT-in-situ-300x188.jpg\" alt=\"\" width=\"572\" height=\"358\" srcset=\"https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2021\/07\/NOX-FILT-in-situ-300x188.jpg 300w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2021\/07\/NOX-FILT-in-situ-768x480.jpg 768w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2021\/07\/NOX-FILT-in-situ-1024x640.jpg 1024w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2021\/07\/NOX-FILT-in-situ-696x435.jpg 696w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2021\/07\/NOX-FILT-in-situ-1068x668.jpg 1068w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2021\/07\/NOX-FILT-in-situ-672x420.jpg 672w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2021\/07\/NOX-FILT-in-situ-610x381.jpg 610w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2021\/07\/NOX-FILT-in-situ.jpg 1280w\" sizes=\"auto, (max-width: 572px) 100vw, 572px\" \/><figcaption id=\"caption-attachment-96507\" class=\"wp-caption-text\">NOX-FILT<\/figcaption><\/figure>\n<p>In these instances, ventilation has to be combined with filtration. The Domus Ventilation NOX-FILT, for example, works on the supply leg of the ducting system of a mechanical ventilation system and prevents up to 99.5% of NO2 pollution from entering a home.<\/p>\n<h3>The years ahead<\/h3>\n<p>There is light on the horizon. We are witnessing one of the biggest vaccination programmes in the history of the world in a bid to fight coronavirus. We are also seeing governments across the globe taking air pollution seriously and putting measures in place to reduce it. And we are seeing ventilation being recognised as a valuable and relatively low cost means of improving our indoor environment and our health.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Paul Williams<\/strong><\/p>\n<p>Product manager<\/p>\n<p><a href=\"https:\/\/www.domusventilation.co.uk\/\" target=\"_blank\" rel=\"noopener noreferrer\">Domus Ventilation<\/a><\/p>\n<p>Tel: +44 (0)3443 715 523<\/p>\n<p><a href=\"mailto:vent.info@domusventilation.co.uk\" target=\"_blank\" rel=\"noopener noreferrer\">vent.info@domusventilation.co.uk<\/a><\/p>\n<p><a href=\"https:\/\/www.domusventilation.co.uk\/\" target=\"_blank\" rel=\"noopener noreferrer\">www.domusventilation.co.uk<\/a><\/p>\n<p>Twitter: <a href=\"https:\/\/twitter.com\/domusvent\" target=\"_blank\" rel=\"noopener noreferrer\">@domusvent<\/a><\/p>\n<p>LinkedIn: <a href=\"https:\/\/www.linkedin.com\/company\/domusventilation\/\" target=\"_blank\" rel=\"noopener noreferrer\">domusventilation<\/a><\/p>\n<div class=\"mk-custom-module-container\">\n<\/div>","protected":false},"excerpt":{"rendered":"<p>With concerns over indoor virus transmission and the health impacts of air pollution, as well as condensation, mould and overheating, ventilation has become a key concern in our buildings. Paul Williams of Domus Ventilation looks at how to improve indoor air quality.<\/p>\n","protected":false},"author":20,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[306],"tags":[25536,54592,90731,465,803],"stakeholder_rel_tag":[],"contributor_rel_tag":[],"class_list":{"0":"post-96501","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-building-control-news","7":"tag-air-conditioning","8":"tag-coronavirus","9":"tag-pbc-today-august-2021","10":"tag-sustainable-construction","11":"tag-ventilation"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v26.9) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Mechanical ventilation\u2019s role in improving indoor air quality<\/title>\n<meta name=\"description\" content=\"With concerns over indoor virus transmission and air pollution, Paul Williams of Domus Ventilation looks at how to improve indoor air quality\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.pbctoday.co.uk\/news\/building-control-news\/improving-indoor-air-quality\/96501\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mechanical ventilation\u2019s role in improving indoor air quality\" \/>\n<meta property=\"og:description\" content=\"With concerns over indoor virus transmission and air pollution, Paul Williams of Domus Ventilation looks at how to improve indoor air quality\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.pbctoday.co.uk\/news\/building-control-news\/improving-indoor-air-quality\/96501\/\" \/>\n<meta property=\"og:site_name\" content=\"Planning, Building &amp; 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