MMC 52pp M10 WEB

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Heating, Ventilation & Indoor Air Quality What’s in a breath of fresh air? A breath of fresh air. A sigh of relief. An angry huff. An exultant gasp. There are many differing types of breath and as human beings we take on average 17,000-30,000 of them per day. Coupled with this, the average person in Britain spends 92% of their time indoors on a week day. So with less than two hours a day spent outdoors, Joe Bradbury of MMC Magazine explores the importance of clean air and ventilation within a building. When we are inside the home, an indoor workplace (or any other type of building, for that matter), we are placing ourselves unwittingly at the mercy of the air within that building. Any chemicals, toxins or pollutants are drawn into our bodies and can cause headaches, eye irritation, skin problems, allergies and fatigue. Prolonged exposure to more serious pollutants can even cause certain types of cancers and other longterm health complications. As specifiers building structures designed for people, we have to consider this in our projects and ensure we do everything within our power to protect occupants from the invisible menace of unclean air. According to the NHS, there are currently 5.4 million people in the UK receiving treatment for asthma; comprising 1.1 million children (1 in 11) and 4.3 million adults (1 in 12). The UK holds some impressive records but boasting some of the highest rates in Europe for Asthma is nothing to brag about; every day, the lives of three families are devastated by the death of a loved one to an asthma attack, and tragically two thirds of these deaths are preventable. Poor indoor air quality exacerbates symptoms of asthma in its sufferers, and plays a sinister role in the development of asthma in susceptible people, such as small children and the elderly. The construction industry is a major source of pollution, responsible for around 4% of 22 MMC Nov 2018 M10 particulate emissions, more water pollution incidents than any other industry, and thousands of noise complaints every year. Something must be done! Mechanical Ventilation with Heat Recovery (MVHR) Innovations within the field of airtightness in buildings have happened so rapidly in recent years and ventilation and heat recovery have had to play catch up to keep up with the momentum. Adequate ventilation in airtight buildings is essential and mechanical ventilation with heat recovery (MVHR) systems offer that effective, efficient and clean way of ventilation so sorely needed by people living in poor quality air across Britain today. MVHR (Mechanical Ventilation with Heat Recovery) provides fresh filtered air into a building whilst retaining most of the energy that has already been used in heating the building. Heat Recovery Ventilation is the solution to the ventilation needs of energy efficient buildings. Mechanical ventilation with heat recovery (MVHR), heat recovery ventilation (HRV) or Comfort ventilation are all names for the same thing. A heat recovery ventilation system properly fitted into a house provides a constant supply of fresh filtered air, maintaining the air quality whilst being practically imperceptible. MVHR works by extracting the air from the polluted sources e.g. kitchen, bathroom, toilets and utility rooms and supplying air to the ‘living’ rooms e.g. bedrooms, living rooms, studies etc. The extracted air is taken through a central heat exchanger and the heat recovered into the supply air. This works both ways, if the air inside the building is colder than the outside air then the building will retain its nice and cool temperature. Bringing the fresh air inside Studies show that a well-sealed building envelope combined with effective filtration of incoming supply air can reduce particle penetration by 78%. The positive health implications of this are profound. The general public understands the impact temperature has on healthy and productive conditions inside buildings sadly all too well; fuel poverty and winter deaths take centre stage in our newspapers and magazines. Unfortunately, the fact that air quality is equally as impactful on society is regularly overlooked. Regardless of how hot or cold it may be outside, people have come to expect comfortable indoor temperatures. They demand that from their buildings. They now need to invoke the same demand for protection from harmful air pollution. Get either wrong and you run the risk of harming your occupants. Warmth and clean air to breathe is essential. As an industry, we are responsible for the comfort and wellbeing of the occupants of the built environment. We must also ensure we are moving forward towards renewables, otherwise I would argue that we aren’t moving forward at all. MVHR just might be the answer.
No ot expe ensive when you conside er the savings! Save on: • Floor Installation • HVAC Installation • Services Installation Save tim me, money and aggravation from costly call-backs The advant tages are clear: • Open web design provides ease of access for services and ventilationn • Improved quality of service fitting , eliminating costly remedial work • Lightweigh t and made to measur e for speedy erection • Clear span further for greater des sign flexibility Extending your advantage For the largest network of li censed manufacturers throughout the UK and Ireland visit: www.mitek.co.uk/manufacturers/ or call 01384 451400 CPD Now available for Posi-Joist Contact MiTek today or visit www .posi-joist.co.uk for full details and an on-line presentation.
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