City centre air quality is typically above WHO annual warning levels for PM2.5 and NO2. The opportunity for improvement is great.
If your building has mechanical ventilation, ask if it uses regularly maintained, low energy, air filters complying fully with British and European standard BS:EN 13779.
To find out more about pollution and indoor air quality, download the following presentation
The issue of Indoor Air Quality has been gradually rising in the public consciousness alongside that of city outside air pollution over the last few years. BSRIA should be praised for their presence of mind in holding this timely IAQ themed event last week in London.
Article by Peter Dyment, Buildings IAQ and Energy Consultant – Camfil Ltd
The event called ‘Indoor Air Quality – must we live with problems?’ was aimed at anyone involved in the air quality arena including all designers, as well as controls companies, contractors, ventilation suppliers and those involved in regulation in the industry. School children fall asleep in class and mould grows on the bathroom walls.
Buildings are getting more air tight, the VOCs in a new building are significant but ventilation systems are not coping. The first half of the event the panel examined the problem, and the second half centred around investigating possible actions for the industry, for government and for BSRIA.
The event speakers shared some of the results from the Building Performance Evaluation programme of the Technology Strategy Board, covering both dwellings and non-domestic buildings.
Post written by Dr Chris Ecob, Global Business Manager for Molecular Filtration, Camfil Group:
The leading organisation responsible for cataloguing chemicals – the CAS Registry (Chemical Abstract Service) – has more than 73 million unique chemicals in their database and is adding new items at the rate of 15,000 every day. Many of these chemicals never pre-existed in nature and have been created by man in the industrial era. Some chemicals only exist as gases in the air.
However, all chemicals, including those that are normally liquids or solids, have to varying degrees the ability to evaporate and become airborne in their molecular form. It is an inescapable fact therefore that all around the globe, there are more chemicals in the air than ever before.
Categorising molecules by impact
Airborne molecules may be categorised according to their impact on humans and our world. Responsibility for smell or odour is perhaps the most obvious.
The receptor cells in the nose and the human brain are capable of detecting and characterising many different odour types. Some molecules are classified as irritants. In addition to creating an odour response, they stimulate an involuntary and negative reaction from the body. The classic example is activation of the tear ducts when chopping onions. Continue reading