Article 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.
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