Improving your indoor air quality - http://www.camfilfarr.co.uk/Filter-technology/Indoor-Air-Quality-IAQ/

1. Improving your indoor air quality
C L E A N A I R S O L U T I O N S
Simon Birkett, Founder and Director,
Clean Air in London
www.cleanairinlondon.org
www.twitter.com/CleanAirLondon
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2. Lack of understanding C L E A N A I R S O L U T I O N S
• Buildings may have mechanical ventilation, air conditioning
and/or air filtration or none of these
• Lack of understanding among senior managers and others
• Few buildings comply with indoor air quality standard EN :
13779
– Some local authorities (LAs) in London have detailed
information about their buildings
– Other LAs do not know if their buildings comply
– Many LAs do not know about compliance in their schools
– Only eight of 15 TfL head office buildings by April 2012
• Significant opportunity to improve indoor air quality and reduce
energy costs
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3. Some practical issues C L E A N A I R S O L U T I O N S
• Need gas filtration and two-stage particle filters in the most-polluted
places
• Gas filters vary in type, quality and efficiency
• Glass fibre, bag filters can maintain performance and reduce energy
loss because they provide a solid barrier and offer much higher
surface air i.e. less resistance
• Synthetic air filters may rely on electrostatic charge initially but lose
their charge and efficiency over time
• Ultraviolet light may tackle bugs but not particles or gases
• Statutory requirement to inspect air conditioning systems at least
every five years
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4. Air filter groups and classes C L E A N A I R S O L U T I O N S
Group Filter class Example of use Average collection Average efficiency Average arrestance
efficiency for the for 0.4 mm particles of dust %
most penetrating %
particle size (MPPS)
%
Coarse G4 Warehouses Over 90
Medium M5 Protection of 40-59
ventilation systems
M6 60-79
Fine F7 Schools 80-89 (min 35)
F8 Laboratories 90-94 (min 55)
F9 Healthcare 95 and above
(min 70)
Efficiency particulate E10 Precision tooling 85
filters
E11 95
E12 99.5
High efficiency H13 and H14 Operating theatres Over 99.95
particulate filters
Ultra low penetration U15, U16 and U17 Space craft Over 99.9995
air filters
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5. European standard EN 13779 since April C L E A N A I R S O L U T I O N S
2007 for non-residential buildings
Outdoor Air Quality (ODA) Indoor Air Quality (IDA)
IDA 1 IDA 2 IDA 3 IDA 4
(High) (Medium) (Moderate) (Low)
ODA 1 F9 F8 F7 F5
Increasing pollution
eg countryside
ODA 2 F7 + F9 F6 + F8 F5 + F7 F5 + F6
eg smaller towns
ODA 3 F7 + GF + F9 F7 + GF + F9 F5 + F7 F5 + F6
eg city centres
GF = Gas filter (carbon filter) and/or chemical filter.
Table based on appendix A.3 “Use of air filters” in European standard EN 13779
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6. Ask Camfil Farr for an ‘Opportunity Assessment’
C L E A N A I R S O L U T I O N S
• Understand the system condition of your Air Handling Unit (AHU)
• Request a report at no cost that proposes an itemised solution
• Choose the best solution using low energy air filters
• Give your existing AHU plant a new and efficient lease of life
• Reduce running costs and get peace of mind
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7. Simple checklist C L E A N A I R S O L U T I O N S
• Use easy access mountings and ensure seals are effective
• Use low energy glass fibre bag filters, with high surface area, rather
than synthetic or ultraviolet type filters to extend life and reduce
energy cost
• Use carbon filters to reduce gaseous pollutants
• Consider upgrading fans as current ones may be energy inefficient
• Clean cooling coils and heat exchangers
• Clean air handling units and duct systems
• Use pressure gauges to monitor ongoing filter efficiency
• Regularly maintain the system and establish operating practices
Ask Camfil Farr to certify your building as complying with EN 13779
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8. We can protect ourselves from air pollution
C L E A N A I R S O L U T I O N S
for up to 90% of the time
If your office has a mechanical ventilation
system or air conditioning (i.e. it is likely to
contain the necessary ducting) please ask your
employer:
“Does our ventilation system include
regularly maintained air filters that
comply with European guideline
EN 13779 and, if not, why not?”
Any questions: visit www.camfilfarr.co.uk
or call 01706 238 000
Photo of soot particles in air filter
Photo: Lennart Nilsson
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9. 9
C L E A N A I R S O L U T I O N S
Sustainable product range
• Improved energy efficiency through
product Life Cycle Assessment and
product Eco-design
• Our most energy efficient filters
account for 60% of air filters for
ventilation systems in buildings sales
• Significant contribution to technical
standards improvement :
EN779:2012 now requires minimum
efficiency for fine filters
performance.
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10. Camfil Farr worldwide C L E A N A I R S O L U T I O N S
10
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