Clean air solutions

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.orgwww.twitter.com/CleanAirLondon

Improving your indoor air quality

Clean air solutions

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

Lack of understanding

Clean air solutions

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

Some practical issues

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C L E A N A I R S O L U T I O N SAir filter groups and classesGroup Filter class Example of use Average collection

efficiency for the most penetrating particle size (MPPS) %

Average efficiency for 0.4 mm particles %

Average arrestance of dust %

Coarse G4 Warehouses Over 90

Medium M5 Protection of ventilation systems

40-59

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 filters

E10 Precision tooling 85

E11 95

E12 99.5

High efficiency particulate filters

H13 and H14 Operating theatres Over 99.95

Ultra low penetration air filters

U15, U16 and U17 Space craft Over 99.9995

Clean air solutions

C L E A N A I R S O L U T I O N SEuropean standard EN 13779 since April 2007 for non-residential buildingsOutdoor Air Quality (ODA) Indoor Air Quality (IDA)

IDA 1(High)

IDA 2 (Medium)

IDA 3 (Moderate)

IDA 4(Low)

Increasing pollution

ODA 1 eg countryside

F9 F8 F7 F5

ODA 2eg smaller towns

F7 + F9 F6 + F8 F5 + F7 F5 + F6

ODA 3eg city centres

F7 + GF + F9 F7 + GF + F9 F5 + F7 F5 + F6

GF = Gas filter (carbon filter) and/or chemical filter.Table based on appendix A.3 “Use of air filters” in European standard EN 13779

Clean air solutions

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

Ask Camfil Farr for an ‘Opportunity Assessment’

Clean air solutions

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

Simple checklist

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C L E A N A I R S O L U T I O N SWe can protect ourselves from air pollution 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 includeregularly 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 filterPhoto: Lennart Nilsson

Clean air solutions

C L E A N A I R S O L U T I O N S

Sustainable product range9

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MFIL

FARR 2023-04-12

• 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.

Clean air solutions

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MFIL

FARR 2023-04-12

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