This document discusses air pollution from traffic emissions and solutions for cleaning indoor air in buildings. It outlines the health risks posed by particulate matter (PM1) and nitrogen dioxide from outdoor air. New standards for testing particle and molecular air filters can ensure filters with over 95% efficiency are used in HVAC systems. These standards provide a means to select filters that clean indoor air and protect public health in cities.

1. THE CAMFIL GROUP
CLEAN AIR SOLUTIONS
How Molecular Air Filters work
NO2 removal for City Air
2018
Peter Dyment
peter.dyment@camfil.com

2. Dirty...
Emissions from diesel engines have
changed, some years ago diesel
engines were characterised by black
sooty smoke. Today, major advances
in engine technology mean that
emissions from diesel engines
...clean air?
appear cleaner than they used to be, to
the point of being invisible. In reality
however, the “clean air” contains billions
of harmful PM1 particles, which although
invisible to the eye can be measured by
sensitive instruments
City Traffic Air Pollution
Fine particles and gases coming from burning of fossil fuels

3. Looking for the solution
Clean air inside city
buildings with
minimum energy
And running costs
Risk to Health from
Traffic air pollution
NOx and PM1 2.5 10
SOx H2S O3 …..

4. Clean air solutions
We spend up to 90%
of our life indoors
This means that indoor air pollution can
substantially influence our health.
Source: European Union - ECA report no23 Ventilation,
Good Indoor Air Quality and Rational Use of Energy
Strategy?
Make our City Buildings
havens against outdoor
traffic air pollution

6. BS EN 16798-3:2017 IAQ Filter requirements
BS EN ISO 16890:2016 Particle filter testing
BS EN ISO 10121-2:2013 Molecular filter testing
Eurovent 4-23 Supply Air filter requirements
WHO guidelines Air pollution exposure limits
The convergence of standards and guidelines
now provides a means of selecting air filters to
ensure healthy clean air for people to breathe
inside city buildings – especially public
buildings offices schools and hospitals
There has also been published IAQ guidance by Well Building,
BREAM LEED and ASHRAE

7. BS EN 16798-3 classification of types of Building Air
1 Outdoor Air ODA 2 Supply Air SUP 3 Indoor Air IDA
are of the most interest for Air Filtration needs
Building Air Schematic

8. BS EN 16798-3 air classifications with Eurovent applications
PM1 Fine combustion particles

9. 9
Eurovent A+ rated particle filters to BS EN ISO 16890:2016 ?

10. BS EN 16798-3 air classifications with Eurovent applications
nitrogen dioxide NO2

12. http://www.bmj.com/company/newsroom/most-of-
londons-%E2%80%8Bnhs-facilities%E2%80%8B-
exceed-legal-air-pollution-limits/

13. BMJ – study annual data ODA3 is NO2 average 60 and above (over 70 sites listed)

14. Clean air solutions
ISO16890:2016
The new particle filter test standard
ISO10121-2:2013
The new molecular filter test standard
The aim should be to use air filters that have an 80% to 90%
Removal efficiency for PM1 particles and nitrogen dioxide

15. Examples require monitored data for ODA to calculate filter efficiency
For listed hospital annual PM2.5 concentrations 15µg/m3 and a reduction
to 2.5µg/m3 a filter particle removal efficiency of 83% would be required.
For listed hospital annual PM2.5 concentrations 20µg/m3 and a reduction
to 2.5µg/m3 a filter particle removal efficiency of 88% would be required.
Note : Supply air filtration does not take into account indoor sourced air
pollution

16. Examples require monitored data for ODA to calculate filter efficiency
For listed hospital annual NO2 concentration 60µg/m3 and a reduction
to 10µg/m3 a filter NO2 removal efficiency of 83% would be required.
For listed hospital annual NO2 concentration 80µg/m3 and a reduction
to 10µg/m3 a filter NO2 removal efficiency of 88% would be required.
Note : Supply air filtration does not take into account indoor sourced air pollution
NO2 is 40µg/m3)

18. HVAC Air Handling Unit solutions
Ducted housings
Camcube
Concealed fan cylinder
units CC300

19. Case study – Airflow conference suite AHU
Camcarb after
18 months
Supply Air NO2carb
NO2 Removal
Efficiency still 83%

20. BS EN ISO 10121-1:2014 BS EN ISO101-2:2013
International Standard
Test method for assessing the
1.performance of gas phase media and
2.air cleaning devices for general
ventilation (GPACD)
Testing based on four key parameters
Removal efficiency
Capacity
Retentivity
Operating pressure drop

21. Home Office test City S unit
Over 25 Minutes
Range 0.3 to 5 microns
97% - 98%
Particle
Reduction

22. Clean air solutions
Summary
Traffic air pollution is the greatest commonly experienced risk to public health in cities.
Poor air quality inside buildings is a significant threat to the health of occupants.
PM1 is the most dangerous particle size. Nitrogen dioxide is the gas pollutant of concern.
• BS EN ISO16890:2016 is the standard for performance testing of particle air filters.
• BS EN ISO 10121-2:2016 is the standard for performance testing of molecular air filters.
• Performance of over 95% efficiency can be achieved using tested HVAC filter solutions.
• These technical standards are close to real life with transparent notation and classification.
• Value for money solutions can be designed and specified with these standards.
• The people living and working in cities need these solutions as from today and
they are available to be used.