ASHRAE Guide Highlighting Best Practices for Improving the Air Quality Indoors (IAQ)

ASHRAE published a free guidance document – A hugely valuable resource to help architects, engineers, FM’s and building managers obtain optimal air quality.

ASHRAE Guide Highlights Best Practices for Improving Indoor Air Quality With indoor air pollution now claiming 3.5 million lives worldwide each year, the need for maintaining healthy indoor air has never been greater.

To help educate architects, engineers, specifiers, contractors, and property managers on the proper techniques to maintain optimal air quality, ASHRAE – the American Society of Heating, Refrigerating and Air-Conditioning Engineers – is offering an important new publication free of charge.

ASHRAE’s Indoor Air Quality Guide: Best Practices for Design, Construction and Commissioning offers an array of guidance and resources for ensuring that indoor environments keep dangerous particles to a minimal and indoor air quality, or IAQ, at the highest possible level. To this end, the guide includes:

  • 40 strategies for achieving 8 critical IAQ objectives
  • Best practices for promoting optimal IAQ through design, construction, and building operation and maintenance.
  • In-depth information, organized by topic, to assist with implementing IAQ best practices.
  • Hundreds of links to resources to assist in the design, construction, and commissioning of buildings with optimal indoor air quality. Continue reading

Oxford Street named one of the most polluted places in the world

Oxford Street is now officially known as the area with the highest known concentration of Nitrogen Dioxide (NO2) in the world. A toxic pollutant that can trigger asthma and heart attacks.

shutterstock_53878849Kamira / Shutterstock.com

Our country’s showcase shopping area has been named a world leader for diesel pollution due to the shopping strip being permanently congested with taxis and buses, whose diesel engines release large amounts of this gas.

We now know just how bad it is, however, for years’ retail and catering staff, office workers, council and utility workers, shoppers and tourists on this and other busy and polluted roads have been completely unaware of the dangers and risks associated with this invisible killer.

Successive Governments and Mayors have avoided the hard steps to tackle this blight that not only affects Oxford Street, but large swathes of London. Instead, the Government and civil service has downplayed the seriousness of the problem and systematically mislead both its own population and the European Commission. Continue reading

Contaminant Sources – Air Pollutants

Air pollution can be categorised as being either particulate (solids) or molecular (gas). Particles are induced into the human respiratory system through breathing. Gaseous or molecular pollution also enters the body in breathing air, but it is able to penetrate beyond the lungs, into the bloodstream and around the entire body.

Camfil - ContaminantsParticulate and molecular pollutants are both present at airports. The principal source is the combustion of fossil fuels.  Jet and diesel engines both release fine particulates in their exhaust. For jet engines the particulates result from incomplete combustion of kerosene fuel. Combustion efficiency reduces at lower engine power levels which are used during landing, taxiing and idling. Diesel engines release high levels of particulates at all duties.

The particulates result from the combustion of both fuel and engine oil.

Diesel particulates fall into several categories:

  • Dry particles or soot
  • Semi-volatile aerosols that have carbon nuclei with oily hydrocarbons condensed on the surface.
  • Carbon particles with sulphur acid molecules condensed on the surface. The sulphur arises for impurities in the fuel. Continue reading