Camfil air filters reduced air pollution by up to 93% during worst smog episode

clean-air-logoArticle by Simon Birkett. Founder and Director, Clean Air in London.

On 18th March, the daily mean outdoor particle air pollution (PM2.5) hit 346 mg/m3 , nearly 14 times the World Health Organisation guideline.

Five air filter combinations were tested by Camfil. Additional standalone air filter units within an office can reduce office-generated pollutants and emissions e.g. volatile organic compounds

Camfil has sponsored Clean Air in London’s campaign to build public understanding of indoor air quality since 2011.

IAQ reportCamfil’s international testing team analysed air pollution in London between 16 and 20 March 2015.

They monitored ambient, or outdoor, air pollution and indoor air quality in Montague Place in central London and tested one or two air filter combinations each day in the office’s air handling unit. Camfil’s report can be downloaded here: Camfil IAQ London report

Camfil’s monitoring coincided with the worst air pollution episode so far this year.

On Wednesday 18 March, Camfil recorded a daily mean for fine particles (PM2.5) in outdoor air of 346 micrograms per cubic metre (mg/m3) which is nearly 14 times the World Health Organisation (WHO) guideline. They also recorded between 300,000,000 and 400,000,000 particles per cubic metre with a diameter between 0.3 microns (mm) and 0.5 mm. Continue reading

How improving indoor air quality can protect health, improve productivity and save money

Why is improving Indoor air quality so important?

  1. Better IAQ increases productivity in offices by 10% thanks to higher air supply rate and appropriate filter maintenance.
  2. Polaroid managed to reduce sick leave by 35% and save 400$ per employee by upgrading buildings HVAC Systems, equalling close to 1,5Million $ total savings per year.
  3. According to an Australian study, improving IAQ reduces sick leave rate by 39% and costs by 44%.
  4. Better IAQ improves schoolchildren reading test results by 13%
  5. Improving by 1% productivity with better ventilation system can save between 20 to 60€/m2, with benefit to cost ratio of 9.4 (productivity/HVAC investment, Energy and maintenance cost). Payback time was less than 2 years


Pages from Quick facts document

How to improve IAQ ?

1. Indoor pollutants source emission control

2. Appropriate ventilation system design and improvement

3. Air filter selection at air inlets according to EN13779

4. Additional molecular filtration or air cleaning for specific locations and pollutions Continue reading

How to improve your indoor air quality – Understand IAQ standard EN13779

Buildings may have mechanical ventilation, air conditioning and/or air filtration or none of these and few buildings comply with indoor air quality standard EN:13779.

A report by Campaign for Clean Air in London (CAL) highlighted the lack of understanding among senior managers and others that few buildings comply with indoor air quality standard EN: 13779.  

In London for example many Local Authorities do not know if their buildings comply and many Local Authorities do not know about compliance in their schools and that significant opportunity exists to improve indoor air quality and reduce energy costs.

So what can I do? Continue reading