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Welcome to the Camfil Farr Training Academy

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By the end of this webinar you will have an update on the new EN779:2012 standard and the opportunity to have clean Indoor Air Quality and energy efficiency with Low Energy Air Filters

EN779:2012 will be arriving

Peter Dyment 07-02-2012

WHEN?

The latest indications are the standard will be due for publication later this year. The situation will be updated over the next few months.

We are all trusting that a decision to proceed will be forthcoming so that our industry can make progress and plan for the future.

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EN779 as a filter test standard has been with us since 1993and was updated in 2002.What is EN779:2012 about and why is it important?

It is the updated European Standard that gives a laboratory test and class to benchmark HVAC air filter particulate efficiency.

It uses a test aerosol of 0.4 micron and ASHRAE dust to load (not test) the filter and increase air filter resistance in stages.

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EN779:2002 Test Rig

The EN779:2002 test is usually performed by an independent test house on air filters up to F9 classification and a test report is issued. What is new in the 2012 update?

EN779 was revised in 2002 because of the problem regarding the inconsistent particulate life performance of synthetic media filters.

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SINTEF test results Norway (1995) show real lifetime performance losses

Synthetic F7 Class filters have been marketed for many years but some a have a working particulate efficiency dropping as low as 10%.

EN13779 advises that F7 is the minimum filter class required for cleaning air and thereby making it safe to inhale. Clearly this standard assumes a consistent F7 performance.

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EN779:2012 has set the minimum particulate efficiency (ME) of 35% on an F7 grade filter. This will exclude inferior synthetic media HVAC filters.

Min Effy. 35%

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Table 1— Classification of air filters1)

Group Class Final test pressure

drop

Average arrestance (Am) of synthetic dust

Average efficiency (Em)

of 0,4 µm particles

Minimum Efficiency2)

of 0,4 µm particles Pa % % %

Coarse G1 250 50 Am 65 - -

G2 250 65 Am 80 - -

G3 250 80 Am 90 - -

G4 250 90 Am - -

Medium M5 450 - 40 Em 60 -

M6 450 - 60 Em 80 -

Fine F7 450 - 80 Em 90 35

F8 450 - 90 Em 95 55

F9 450 - 95 Em 70

NOTE 1) The characteristics of atmospheric dust vary widely in comparison with those of the synthetic loading dust used in the tests. Because of this the test results do not provide a basis for predicting either operational performance or life. Loss of media charge or shedding of particles or fibres can also adversely affect efficiency. 2) Minimum efficiency is the lowest efficiency among the initial efficiency, discharged efficiency and the lowest efficiency throughout the loading procedure of the test.

Test standard for coarse and fine air filters

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Indoor Air Quality approach 2012Particulate Efficiency

ME (Minimum Efficiency) - F7 > 35% - F8 > 55% - F9 > 70%

Average efficiency – as before with caution - nothing to change

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Indoor Air Quality approach 2012

Keep the IAQ level high! Risk of decreasing efficiency from competitors!

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IAQ approach for 2012

When the outdoor air quality has been categorized, EN13779:2007 clearly specifies the filter class that is required to achieve preferred indoor air quality:

Recommendations in EN13779: 2007

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Indoor Air improvement during 50 years

2011 filters for good IAQ

Particulate

1961 filters for good IAQ

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Indoor Air improvement during 50 years

2011 filters for good IAQ

Particulate

1961

G4 – M6

F7

Protecting equipment

IAQ / healthF9

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Indoor Air improvement during 50 years

2011

Particulate

2012

1960 G4 – M6

F7 – F9

Protecting equipment

IAQ health

EN779:2012

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Indoor Air improvement during 50 years

2011

Particulate

2012

1961

G4 – F6F7 – F9

Protecting equipment

IAQ health

Risk ?Possibility!

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Why is there a risk during 2012 ?• Glass fibre media F7 >60% efficiency – optimum

• The new EN779:2012 ME = 35% for F7 (Minimum Efficiency)

• Could lead to over 40% less clean air

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Eurovent Energy Efficiency Rating Programme

Based on…… - EN779:2012

ME - F7 > 35% - F8 > 55% - F9 > 70%

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• ME - F7 50 > 35% - F8 70 > 55% - F9 80 > 70%

dP lower

Energy rating higher

Eurovent Energy Efficiency Rating Programme

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Why a is there a risk in 2012 ?

• Traditional glass fibre media F7 > 60% minimum efficiency – in built up environment• Synthetic F7 charged media – ME = 16-20%

• Synthetic media has to improve to reach minimum 35% ME (minimum efficiency) – with increased pressure drop

• New glass media >45% efficiency – lower pressure drop

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Check the Indoor Air Quality Factor (IAQ factor)

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The IAQ factor is found by dividing the LCC by the ME. It tells you have much filter performance you are getting for your money.

EG. M7 F7 bag = 24.7 IAQG4 S-Flo-F7 bag = 154.6 IAQ

IAQ Factor is 6.25 X

per % Minimum Efficiency (ME)

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HVAC Air Filtration Hi-Flo F7

Synthetic Competitor F7 S-Flo F7

All medias shown at the same magnification

Synthetic medias rely on electrostatic charge for good particulate efficiency

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What is the 2012 HVAC product opportunity?• Synthetic media filters will have to improve to reach 35% minimum

particulate efficiency (ME) – meaning an increased pressure drop

• Reduce pressure drop with LEAF – keep minimum efficiency high (ME) usually about 55% to 60% for F7.

• Never compromise on filter particulate efficiency !

• Save energy – better LCC – Eurovent Energy Classification Programme

• That is an improvement opportunity!

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THANK YOU for attending this webinar session

ANY QUESTIONS?Please do not hesitate to contact Camfil Farr for any additional information or to

arrange a visit.For more information about clean air solutions, improving air quality, low energy

air filters, CRC (Carbon Reduction Commitment), AHUs (Air Handling Units) and the EPBD, visit

www.keepthecityout.co.ukwww.lowenergyairfilter.co.uk

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