Understanding the new Air Filtration Standard

EN 779 2012amp

Eurovent 411A guide to

Energy Classification of Air Filters for General Ventilation Purposes

air filtration excellence for buildings

EN 779 2012 A New Test Standard for Filter Efficiency

Air filters generally rely on two lsquomainrsquo principles for capturing particulatecontamination one being lsquomechanicalrsquo and the other lsquoelectrostaticrsquo

Mechanical filtration basically relies on a lsquobarrierrsquo of fibres interwoven to form a matrixthrough which the air has to pass the closer or lsquotighterrsquo the matrix the higher the filterefficiency

The electrostatic principle is employed to lsquochargersquo material fibres (often with a moreopen matrix) during production in order to enhance filter efficiency It has beenestablished beyond doubt that certain types of lsquochallengersquo such as combustionparticles in normal atmospheric air may neutralise such charges resulting in seriousloss of filter efficiency

This has led to three fundamental changes within the 2012 standard (differing from the2002 version)

Classification of Air Filters according to EN 779 2012

Class Final Pressuredrop (Pascals

Average Arestanceof Synthetic dust

Average Efficiencyof 04 microm particles

Min Efficiency of 04 microm particles

G1 250 50 le Am lt 65 -

G2 250 65 le Am lt 80 -

G3 250 80 le Am lt 90 -

G4 250 90 le Am -

M5 450 40 le Am lt 60 -

M6 450 60 le Am lt 80 -

F7 450 80 le Am lt 90 35

F8 450 90 le Am lt 95 55

F9 450 95 le Am 70

1 Compulsory discharge of all media High efficiency filters of F7 - F9 are subject to a lsquodischargeprocessrsquo to remove any electrostatic charge inorder to establish an initial lsquountreated efficiencyrsquo

2 Minimum Efficiency value introduced Filter grades F7 - F9 were previously determined by anaverage efficiency The new standard requires that in addition to this minimum efficiency valuesmust also be met The minimum efficiency value is defined as lsquothe lowest efficiency among thedischarged efficiency initial (clean filter) efficiency and that established throughout the full dustloading test The minimum efficiency values required to be met are detailed in the table below

3 Medium Grade classification introduced Filter grades previously defined as lsquofine grade filtersrsquo F5amp F6 are now classified purely as lsquomedium grade filtersrsquo M5 amp M6 (no minimum efficiencyrequirement is applied to the M grades

EUROVENT 411 Guideline on Energy Efficiency

Eurovent 411 is a guideline that defines a method of air filter classification with regardto energy-efficient operation The method allows for an energy rating classification offilter grades G4 M5 amp M6 and F7 to F9 and is based on the testing of air filters againstEN 779 2012 with a calculation that encompasses three set and one variable criterion

Set criteria A rated air volume (0944 M3s) a filter operation time based on 12 months(6000 hours) and a fan efficiency of 50

Variable value an average operating pressure loss determined by establishing alsquonominated finalrsquo filter pressure loss at a given test dust holding capacity (this variesfor different grades and is detailed as MG MM and MF in the table below) The averagepressure loss is the mean between the initial (clean filter) pressure loss and thelsquonominated finalrsquo pressure loss The calculation used is

W = qV∆p t

Ƞ 1000

Where qV = 0944 M3s t = 6000 h and Ƞ = 05

Where W = qV (air volume 0944) x ∆ p (average pressure loss) x t (timehours 6000)

Ƞ x 1000 (fan efficiency 500)

The resultant W being the lsquocomparative valuersquo for energy use as kWhyear This value is then applied to kWh values in table 2 to determine an lsquoEnergy Classrsquo (A to G)

Energy efficiency class limits for each filter class to EN 779 measured at 0944 M3s are below

Filter class G4 M5 M6 F7 F8 F9

MTE - - - ge 35 ge 55 ge 70

ASHRAE MG = 350 g MM = 250 g MF = 100 g

kWh kWh kWh kWh kWh kWh

A 0 ndash 600 0 ndash 650 0 ndash 800 0 ndash 1200 0 ndash 1600 0 - 2000

B gt600 ndash 700 gt650 ndash 780 gt800 ndash 950 gt1200 ndash 1450 gt1600 ndash 1950 gt2000 - 2500

C gt700 ndash 800 gt780 ndash 910 gt950 ndash 1100 gt1450 ndash 1700 gt1950 ndash 2300 gt2500 - 3000

D gt800 ndash 900 gt910 ndash 1040 gt1100 ndash 1250 gt1700 ndash 1950 gt2300 ndash 2650 gt3000 - 3500

E gt900 ndash 1000 gt1040 ndash 1170 gt1250 ndash 1400 gt1950 ndash 2200 gt2650 ndash 3000 gt3500 - 4000

F gt1000 ndash 1100 gt1170 ndash 1300 gt1400 ndash 1550 gt2200 ndash 2450 gt3000 - 3350 gt4000 - 4500

G gt 1100 gt 1300 gt 1550 gt 2450 gt 3350 gt 4500

The Unique Bacticell Air Filter CartridgeTESTIMONIALS

ldquoThe Bacticell Filters we have fitted in our plant have not only increased the air quality in our food processing facility it has helped us reduce our carbon footprint in 3 ways

1 Reduced our running costs by between 9 to 12 whilst helping us realise cost savings of gtpound7k due to the increased surface area

2 The requirement for filter changes has reduced which means less waste to dispose of

3 Less changes mean less service visits so less fuel used in running vehicles

We are very satisfied with the continued support and innovation provided by the team at Nationwide and hope to continue our partnership with themrdquo

ldquoWe installed the first batch 2 years ago and following their performance we have now changed all our bag filter plants in favour of the BacticellCartridge The installed life of the Bacticells is working out to be virtually 3 times greater than that of the bag filters (as you indicated it would) My filter change labour costs have been reduced considerably as has our waste filter disposalrdquo

ldquoOur site has been upgrading all their Air Handling Units as parts of their energy reduction programme

The upgrade includes replacing bag filters with Bacticell filters which have significantly lower pressure drop and reduce the energy required to run the units

The additional benefit is that they need replacing less often and the modular design reduces the manual handling of the filters

This AHU upgrade programme has currently contributed to a 7 energy reduction across the site rdquo

A

3 filter grades 3 standard face sizes 3 header depths

Initial pressure loss 86 Pascals (F7)100 Pascals (F8) 105 Pascals (F9)

Standard filter depth of only 300mm ndashvaluable space-saving opportunities atdesign stage

Completely interchangeable as replacementsfor standard size bag filters

NFC is the only UK manufacturer to produce acartridge with a re-usable housing reducing wasteat disposal and cost in supplying and fittingreplacement cells

Bacti-G treated water-repellent glass paper isuniformly pleated and sealed into individual cellsthen fitted in a lsquovee-formationrsquo within the housingThe totally rigid structure ensures that the filter willnot sag or collapse under reduced or nil airfloweliminating the possibility of particulate lsquosievingrsquocaused by air turbulence

Energy performancedetail in conjunctionwith Eurovent 411 fora Grade F8 Bacticelltested in accordancewith EN 779 2012

Nominal Air flow 0944 m3s EN779Initial efficiency 04 microm 68 Minimum efficiency 04 microm 68 Annual energy consumption 1345 kWhannum

Environmental Features Unique Benefits from the Bacticell Air Filter Cartridge

Re-usable housing Lower waste disposal costs

Replacable filter cells Less down-time at filter changeLighter and less bulky to transport

Bacti-G anti-microbial protection

Eradicates bacterialfungal growth on contact to reduce contamination of ductwork and occupied areas and reduces health risk for engineers at filter change

Energy consumption Uses up to 30 less fan energy compared to an equivalent grade bag filter

Flammability amp toxicsmoke emission

Entire filter conforms to stringent independent test standards in respect offlammability and toxic smoke emission Full test certificate available

This list represents some of the micro-organisms that can be eradicated upon contact with the Bacticell CartridgeBACTERIASalmonellaE-coliListeria SpPseudomonas SpProteus SpKlebsiella SpFlavobacterium SpBacillus SpAlcaligenes SpStrep faecalisStaph aureus

Aeromonas SpAchrombacteria SpProt vulgarisClost welchiiStrep mutansMRSAEcoli lsquo0157rsquoLegionella

FUNGIStreptomyces SpAspergillus Sp

Cephalosporium SpFusarium SpPaecilomyces SpCladosporium SpPenicillum Sp

ALGAEChlorella SpOscillatoriaNaviculaScenedesmusMelsira

YEASTConiophgoraputeanaMonilia albicansCandida SpRhodotorula SpCryptococcusSacchromyces

VIRAL CHALLENGEMS2 coliphage(synthetic test virus)

ldquothe benefits of the Bacticell Air Filter Cartridge extend beyond its primary function as an alternative

to the conventional bag filter rdquo(HampV News Judges 2012)

This cartridge provides a low-cost option for clients wishing to receive the benefits of a rigidstructure to avoid the risk of bags deflating or sagging and the potential to make some energysavings as a result of a lower initial pressure loss However the unit requires completedisposal

The filter is constructed from high efficiency glass paper close pleated and separated by lsquohot-meltrsquo beeds The pleat packs are then sealed within a heat resistant plastic case with anintegral header frame

FOR FURTHER INFORMATIONNORTHERN OFFICE SCOTLAND OFFICE SOUTHERN OFFICESales amp Technical Enquiries Manufacture TelFax 01355 226811 Contract ManagementTel 01524 389713 Fax 01524 555769 Tel 01372 728548 Fax 01372 742831 NFC House Vickers Industrial Estate infonationwidefilterscom Unit 16 First Quarter Business Park Mellishaw Lane Morecambe wwwnationwidefilterscom Blenheim Road Epsom Lancashire LA3 3EN Surrey KT19 9QN

F6-F9 Rigid Pack CartridgePerformance DetailInitial pressure loss ranging from 80 to 105 Pascals dependent on grade selectionThe NFC lsquoRigid Pack cartridge is available in energy class A or B dependent on grade

Environmental Features Rigid Pack Benefits

Standard depth ndash 300mm Standard depth for all grades provides opportunities for space-saving at AHU design stage

Life-span Can last up to 3 times longer than a conventional bag filter

Energy consumption Lower energy consumption compared with a conventional bag filter due to increased media filtration area

M6-F8 ESB Micro-safe Glass Bags

In some circumstances the ability to switch to a cartridge filter is not feasible

Nationwidersquos ESB Micro-safe Glass Bags provide greater consistency in performancecompared with synthetic bags and in the case of Nationwide they conform to stringentindependent test standards in respect of flammability and toxic smoke emission Full testcertificate available

Performance DetailWhilst installed life and environmental benefits may not be as great as with the BacticellCartridge NFCrsquos lsquostandard classrsquo ESB (Energy Saving Bags ) Micro-safe glass bagfilters can also provide an alternative energy saving option

The range is also available as an NFC lsquoClass Arsquo option catering for additional levels ofprotection against flammability and toxic smoke emission

All NFC ESB (Energy Saving Bags) are manufactured from micro-safe glass fibre tomeet energy class A B or C ndash dependent on number and length of pockets (greatermaterial area reducing operational pressure loss)

Applying EN 779 2012 in conjunction with Eurovent 411 (Energy classification)

Due to the requirement for F7 to F9 filter grades to meet minimum efficiency requirements certain filter types previously available willundoubtedly undergo re-classification

Bag filters manufactured from synthetic materials are most likely as the majority rely on electrostatic properties to enhanceperformanceefficiency Independent tests conducted on many of these products indicate minimum efficiency levels (after discharge) tobe well under 30 for previously graded F7 and F8 classes (Minimum efficiencies now required to be met are 35 for F7 55 for F8and 70 for F9)

Products relying mainly on lsquomechanical propertiesrsquo to achieve filter efficiency requirements (such as glass bag filters and cartridgesmanufactured from filter paper materials) are less likely to require re-classification as these typically achieve minimum efficiency levels(after discharge) in the order of gt50 for F7 and gt70 for F8

In addition to meeting the above requirements air filter manufacturers and suppliers must now support product claims withindependent testing by a laboratory authorised to test products against EN 779 2012 Without such tests being conducted an lsquoenergyrating classificationrsquo to Eurovent 411 cannot be applied

NFC

EN

779-

411

Issu

e 1

EN 779 2012 A New Test Standard for Filter Efficiency

Air filters generally rely on two lsquomainrsquo principles for capturing particulatecontamination one being lsquomechanicalrsquo and the other lsquoelectrostaticrsquo

Mechanical filtration basically relies on a lsquobarrierrsquo of fibres interwoven to form a matrixthrough which the air has to pass the closer or lsquotighterrsquo the matrix the higher the filterefficiency

The electrostatic principle is employed to lsquochargersquo material fibres (often with a moreopen matrix) during production in order to enhance filter efficiency It has beenestablished beyond doubt that certain types of lsquochallengersquo such as combustionparticles in normal atmospheric air may neutralise such charges resulting in seriousloss of filter efficiency

This has led to three fundamental changes within the 2012 standard (differing from the2002 version)

Classification of Air Filters according to EN 779 2012

Class Final Pressuredrop (Pascals

Average Arestanceof Synthetic dust

Average Efficiencyof 04 microm particles

Min Efficiency of 04 microm particles

G1 250 50 le Am lt 65 -

G2 250 65 le Am lt 80 -

G3 250 80 le Am lt 90 -

G4 250 90 le Am -

M5 450 40 le Am lt 60 -

M6 450 60 le Am lt 80 -

F7 450 80 le Am lt 90 35

F8 450 90 le Am lt 95 55

F9 450 95 le Am 70

1 Compulsory discharge of all media High efficiency filters of F7 - F9 are subject to a lsquodischargeprocessrsquo to remove any electrostatic charge inorder to establish an initial lsquountreated efficiencyrsquo

2 Minimum Efficiency value introduced Filter grades F7 - F9 were previously determined by anaverage efficiency The new standard requires that in addition to this minimum efficiency valuesmust also be met The minimum efficiency value is defined as lsquothe lowest efficiency among thedischarged efficiency initial (clean filter) efficiency and that established throughout the full dustloading test The minimum efficiency values required to be met are detailed in the table below

3 Medium Grade classification introduced Filter grades previously defined as lsquofine grade filtersrsquo F5amp F6 are now classified purely as lsquomedium grade filtersrsquo M5 amp M6 (no minimum efficiencyrequirement is applied to the M grades

EUROVENT 411 Guideline on Energy Efficiency

Eurovent 411 is a guideline that defines a method of air filter classification with regardto energy-efficient operation The method allows for an energy rating classification offilter grades G4 M5 amp M6 and F7 to F9 and is based on the testing of air filters againstEN 779 2012 with a calculation that encompasses three set and one variable criterion

Set criteria A rated air volume (0944 M3s) a filter operation time based on 12 months(6000 hours) and a fan efficiency of 50

Variable value an average operating pressure loss determined by establishing alsquonominated finalrsquo filter pressure loss at a given test dust holding capacity (this variesfor different grades and is detailed as MG MM and MF in the table below) The averagepressure loss is the mean between the initial (clean filter) pressure loss and thelsquonominated finalrsquo pressure loss The calculation used is

W = qV∆p t

Ƞ 1000

Where qV = 0944 M3s t = 6000 h and Ƞ = 05

Where W = qV (air volume 0944) x ∆ p (average pressure loss) x t (timehours 6000)

Ƞ x 1000 (fan efficiency 500)

The resultant W being the lsquocomparative valuersquo for energy use as kWhyear This value is then applied to kWh values in table 2 to determine an lsquoEnergy Classrsquo (A to G)

Energy efficiency class limits for each filter class to EN 779 measured at 0944 M3s are below

Filter class G4 M5 M6 F7 F8 F9

MTE - - - ge 35 ge 55 ge 70

ASHRAE MG = 350 g MM = 250 g MF = 100 g

kWh kWh kWh kWh kWh kWh

A 0 ndash 600 0 ndash 650 0 ndash 800 0 ndash 1200 0 ndash 1600 0 - 2000

B gt600 ndash 700 gt650 ndash 780 gt800 ndash 950 gt1200 ndash 1450 gt1600 ndash 1950 gt2000 - 2500

C gt700 ndash 800 gt780 ndash 910 gt950 ndash 1100 gt1450 ndash 1700 gt1950 ndash 2300 gt2500 - 3000

D gt800 ndash 900 gt910 ndash 1040 gt1100 ndash 1250 gt1700 ndash 1950 gt2300 ndash 2650 gt3000 - 3500

E gt900 ndash 1000 gt1040 ndash 1170 gt1250 ndash 1400 gt1950 ndash 2200 gt2650 ndash 3000 gt3500 - 4000

F gt1000 ndash 1100 gt1170 ndash 1300 gt1400 ndash 1550 gt2200 ndash 2450 gt3000 - 3350 gt4000 - 4500

G gt 1100 gt 1300 gt 1550 gt 2450 gt 3350 gt 4500

The Unique Bacticell Air Filter CartridgeTESTIMONIALS

ldquoThe Bacticell Filters we have fitted in our plant have not only increased the air quality in our food processing facility it has helped us reduce our carbon footprint in 3 ways

1 Reduced our running costs by between 9 to 12 whilst helping us realise cost savings of gtpound7k due to the increased surface area

2 The requirement for filter changes has reduced which means less waste to dispose of

3 Less changes mean less service visits so less fuel used in running vehicles

We are very satisfied with the continued support and innovation provided by the team at Nationwide and hope to continue our partnership with themrdquo

ldquoWe installed the first batch 2 years ago and following their performance we have now changed all our bag filter plants in favour of the BacticellCartridge The installed life of the Bacticells is working out to be virtually 3 times greater than that of the bag filters (as you indicated it would) My filter change labour costs have been reduced considerably as has our waste filter disposalrdquo

ldquoOur site has been upgrading all their Air Handling Units as parts of their energy reduction programme

The upgrade includes replacing bag filters with Bacticell filters which have significantly lower pressure drop and reduce the energy required to run the units

The additional benefit is that they need replacing less often and the modular design reduces the manual handling of the filters

This AHU upgrade programme has currently contributed to a 7 energy reduction across the site rdquo

A

3 filter grades 3 standard face sizes 3 header depths

Initial pressure loss 86 Pascals (F7)100 Pascals (F8) 105 Pascals (F9)

Standard filter depth of only 300mm ndashvaluable space-saving opportunities atdesign stage

Completely interchangeable as replacementsfor standard size bag filters

NFC is the only UK manufacturer to produce acartridge with a re-usable housing reducing wasteat disposal and cost in supplying and fittingreplacement cells

Bacti-G treated water-repellent glass paper isuniformly pleated and sealed into individual cellsthen fitted in a lsquovee-formationrsquo within the housingThe totally rigid structure ensures that the filter willnot sag or collapse under reduced or nil airfloweliminating the possibility of particulate lsquosievingrsquocaused by air turbulence

Energy performancedetail in conjunctionwith Eurovent 411 fora Grade F8 Bacticelltested in accordancewith EN 779 2012

Nominal Air flow 0944 m3s EN779Initial efficiency 04 microm 68 Minimum efficiency 04 microm 68 Annual energy consumption 1345 kWhannum

Environmental Features Unique Benefits from the Bacticell Air Filter Cartridge

Re-usable housing Lower waste disposal costs

Replacable filter cells Less down-time at filter changeLighter and less bulky to transport

Bacti-G anti-microbial protection

Eradicates bacterialfungal growth on contact to reduce contamination of ductwork and occupied areas and reduces health risk for engineers at filter change

Energy consumption Uses up to 30 less fan energy compared to an equivalent grade bag filter

Flammability amp toxicsmoke emission

Entire filter conforms to stringent independent test standards in respect offlammability and toxic smoke emission Full test certificate available

This list represents some of the micro-organisms that can be eradicated upon contact with the Bacticell CartridgeBACTERIASalmonellaE-coliListeria SpPseudomonas SpProteus SpKlebsiella SpFlavobacterium SpBacillus SpAlcaligenes SpStrep faecalisStaph aureus

Aeromonas SpAchrombacteria SpProt vulgarisClost welchiiStrep mutansMRSAEcoli lsquo0157rsquoLegionella

FUNGIStreptomyces SpAspergillus Sp

Cephalosporium SpFusarium SpPaecilomyces SpCladosporium SpPenicillum Sp

ALGAEChlorella SpOscillatoriaNaviculaScenedesmusMelsira

YEASTConiophgoraputeanaMonilia albicansCandida SpRhodotorula SpCryptococcusSacchromyces

VIRAL CHALLENGEMS2 coliphage(synthetic test virus)

ldquothe benefits of the Bacticell Air Filter Cartridge extend beyond its primary function as an alternative

to the conventional bag filter rdquo(HampV News Judges 2012)

This cartridge provides a low-cost option for clients wishing to receive the benefits of a rigidstructure to avoid the risk of bags deflating or sagging and the potential to make some energysavings as a result of a lower initial pressure loss However the unit requires completedisposal

The filter is constructed from high efficiency glass paper close pleated and separated by lsquohot-meltrsquo beeds The pleat packs are then sealed within a heat resistant plastic case with anintegral header frame

FOR FURTHER INFORMATIONNORTHERN OFFICE SCOTLAND OFFICE SOUTHERN OFFICESales amp Technical Enquiries Manufacture TelFax 01355 226811 Contract ManagementTel 01524 389713 Fax 01524 555769 Tel 01372 728548 Fax 01372 742831 NFC House Vickers Industrial Estate infonationwidefilterscom Unit 16 First Quarter Business Park Mellishaw Lane Morecambe wwwnationwidefilterscom Blenheim Road Epsom Lancashire LA3 3EN Surrey KT19 9QN

F6-F9 Rigid Pack CartridgePerformance DetailInitial pressure loss ranging from 80 to 105 Pascals dependent on grade selectionThe NFC lsquoRigid Pack cartridge is available in energy class A or B dependent on grade

Environmental Features Rigid Pack Benefits

Standard depth ndash 300mm Standard depth for all grades provides opportunities for space-saving at AHU design stage

Life-span Can last up to 3 times longer than a conventional bag filter

Energy consumption Lower energy consumption compared with a conventional bag filter due to increased media filtration area

M6-F8 ESB Micro-safe Glass Bags

In some circumstances the ability to switch to a cartridge filter is not feasible

Nationwidersquos ESB Micro-safe Glass Bags provide greater consistency in performancecompared with synthetic bags and in the case of Nationwide they conform to stringentindependent test standards in respect of flammability and toxic smoke emission Full testcertificate available

Performance DetailWhilst installed life and environmental benefits may not be as great as with the BacticellCartridge NFCrsquos lsquostandard classrsquo ESB (Energy Saving Bags ) Micro-safe glass bagfilters can also provide an alternative energy saving option

The range is also available as an NFC lsquoClass Arsquo option catering for additional levels ofprotection against flammability and toxic smoke emission

All NFC ESB (Energy Saving Bags) are manufactured from micro-safe glass fibre tomeet energy class A B or C ndash dependent on number and length of pockets (greatermaterial area reducing operational pressure loss)

Applying EN 779 2012 in conjunction with Eurovent 411 (Energy classification)

Due to the requirement for F7 to F9 filter grades to meet minimum efficiency requirements certain filter types previously available willundoubtedly undergo re-classification

Bag filters manufactured from synthetic materials are most likely as the majority rely on electrostatic properties to enhanceperformanceefficiency Independent tests conducted on many of these products indicate minimum efficiency levels (after discharge) tobe well under 30 for previously graded F7 and F8 classes (Minimum efficiencies now required to be met are 35 for F7 55 for F8and 70 for F9)

Products relying mainly on lsquomechanical propertiesrsquo to achieve filter efficiency requirements (such as glass bag filters and cartridgesmanufactured from filter paper materials) are less likely to require re-classification as these typically achieve minimum efficiency levels(after discharge) in the order of gt50 for F7 and gt70 for F8

In addition to meeting the above requirements air filter manufacturers and suppliers must now support product claims withindependent testing by a laboratory authorised to test products against EN 779 2012 Without such tests being conducted an lsquoenergyrating classificationrsquo to Eurovent 411 cannot be applied

NFC

EN

779-

411

Issu

e 1

EUROVENT 411 Guideline on Energy Efficiency

Eurovent 411 is a guideline that defines a method of air filter classification with regardto energy-efficient operation The method allows for an energy rating classification offilter grades G4 M5 amp M6 and F7 to F9 and is based on the testing of air filters againstEN 779 2012 with a calculation that encompasses three set and one variable criterion

Set criteria A rated air volume (0944 M3s) a filter operation time based on 12 months(6000 hours) and a fan efficiency of 50

Variable value an average operating pressure loss determined by establishing alsquonominated finalrsquo filter pressure loss at a given test dust holding capacity (this variesfor different grades and is detailed as MG MM and MF in the table below) The averagepressure loss is the mean between the initial (clean filter) pressure loss and thelsquonominated finalrsquo pressure loss The calculation used is

W = qV∆p t

Ƞ 1000

Where qV = 0944 M3s t = 6000 h and Ƞ = 05

Where W = qV (air volume 0944) x ∆ p (average pressure loss) x t (timehours 6000)

Ƞ x 1000 (fan efficiency 500)

The resultant W being the lsquocomparative valuersquo for energy use as kWhyear This value is then applied to kWh values in table 2 to determine an lsquoEnergy Classrsquo (A to G)

Energy efficiency class limits for each filter class to EN 779 measured at 0944 M3s are below

Filter class G4 M5 M6 F7 F8 F9

MTE - - - ge 35 ge 55 ge 70

ASHRAE MG = 350 g MM = 250 g MF = 100 g

kWh kWh kWh kWh kWh kWh

A 0 ndash 600 0 ndash 650 0 ndash 800 0 ndash 1200 0 ndash 1600 0 - 2000

B gt600 ndash 700 gt650 ndash 780 gt800 ndash 950 gt1200 ndash 1450 gt1600 ndash 1950 gt2000 - 2500

C gt700 ndash 800 gt780 ndash 910 gt950 ndash 1100 gt1450 ndash 1700 gt1950 ndash 2300 gt2500 - 3000

D gt800 ndash 900 gt910 ndash 1040 gt1100 ndash 1250 gt1700 ndash 1950 gt2300 ndash 2650 gt3000 - 3500

E gt900 ndash 1000 gt1040 ndash 1170 gt1250 ndash 1400 gt1950 ndash 2200 gt2650 ndash 3000 gt3500 - 4000

F gt1000 ndash 1100 gt1170 ndash 1300 gt1400 ndash 1550 gt2200 ndash 2450 gt3000 - 3350 gt4000 - 4500

G gt 1100 gt 1300 gt 1550 gt 2450 gt 3350 gt 4500

The Unique Bacticell Air Filter CartridgeTESTIMONIALS

ldquoThe Bacticell Filters we have fitted in our plant have not only increased the air quality in our food processing facility it has helped us reduce our carbon footprint in 3 ways

1 Reduced our running costs by between 9 to 12 whilst helping us realise cost savings of gtpound7k due to the increased surface area

2 The requirement for filter changes has reduced which means less waste to dispose of

3 Less changes mean less service visits so less fuel used in running vehicles

We are very satisfied with the continued support and innovation provided by the team at Nationwide and hope to continue our partnership with themrdquo

ldquoWe installed the first batch 2 years ago and following their performance we have now changed all our bag filter plants in favour of the BacticellCartridge The installed life of the Bacticells is working out to be virtually 3 times greater than that of the bag filters (as you indicated it would) My filter change labour costs have been reduced considerably as has our waste filter disposalrdquo

ldquoOur site has been upgrading all their Air Handling Units as parts of their energy reduction programme

The upgrade includes replacing bag filters with Bacticell filters which have significantly lower pressure drop and reduce the energy required to run the units

The additional benefit is that they need replacing less often and the modular design reduces the manual handling of the filters

This AHU upgrade programme has currently contributed to a 7 energy reduction across the site rdquo

A

3 filter grades 3 standard face sizes 3 header depths

Initial pressure loss 86 Pascals (F7)100 Pascals (F8) 105 Pascals (F9)

Standard filter depth of only 300mm ndashvaluable space-saving opportunities atdesign stage

Completely interchangeable as replacementsfor standard size bag filters

NFC is the only UK manufacturer to produce acartridge with a re-usable housing reducing wasteat disposal and cost in supplying and fittingreplacement cells

Bacti-G treated water-repellent glass paper isuniformly pleated and sealed into individual cellsthen fitted in a lsquovee-formationrsquo within the housingThe totally rigid structure ensures that the filter willnot sag or collapse under reduced or nil airfloweliminating the possibility of particulate lsquosievingrsquocaused by air turbulence

Energy performancedetail in conjunctionwith Eurovent 411 fora Grade F8 Bacticelltested in accordancewith EN 779 2012

Nominal Air flow 0944 m3s EN779Initial efficiency 04 microm 68 Minimum efficiency 04 microm 68 Annual energy consumption 1345 kWhannum

Environmental Features Unique Benefits from the Bacticell Air Filter Cartridge

Re-usable housing Lower waste disposal costs

Replacable filter cells Less down-time at filter changeLighter and less bulky to transport

Bacti-G anti-microbial protection

Eradicates bacterialfungal growth on contact to reduce contamination of ductwork and occupied areas and reduces health risk for engineers at filter change

Energy consumption Uses up to 30 less fan energy compared to an equivalent grade bag filter

Flammability amp toxicsmoke emission

Entire filter conforms to stringent independent test standards in respect offlammability and toxic smoke emission Full test certificate available

This list represents some of the micro-organisms that can be eradicated upon contact with the Bacticell CartridgeBACTERIASalmonellaE-coliListeria SpPseudomonas SpProteus SpKlebsiella SpFlavobacterium SpBacillus SpAlcaligenes SpStrep faecalisStaph aureus

Aeromonas SpAchrombacteria SpProt vulgarisClost welchiiStrep mutansMRSAEcoli lsquo0157rsquoLegionella

FUNGIStreptomyces SpAspergillus Sp

Cephalosporium SpFusarium SpPaecilomyces SpCladosporium SpPenicillum Sp

ALGAEChlorella SpOscillatoriaNaviculaScenedesmusMelsira

YEASTConiophgoraputeanaMonilia albicansCandida SpRhodotorula SpCryptococcusSacchromyces

VIRAL CHALLENGEMS2 coliphage(synthetic test virus)

ldquothe benefits of the Bacticell Air Filter Cartridge extend beyond its primary function as an alternative

to the conventional bag filter rdquo(HampV News Judges 2012)

This cartridge provides a low-cost option for clients wishing to receive the benefits of a rigidstructure to avoid the risk of bags deflating or sagging and the potential to make some energysavings as a result of a lower initial pressure loss However the unit requires completedisposal

The filter is constructed from high efficiency glass paper close pleated and separated by lsquohot-meltrsquo beeds The pleat packs are then sealed within a heat resistant plastic case with anintegral header frame

FOR FURTHER INFORMATIONNORTHERN OFFICE SCOTLAND OFFICE SOUTHERN OFFICESales amp Technical Enquiries Manufacture TelFax 01355 226811 Contract ManagementTel 01524 389713 Fax 01524 555769 Tel 01372 728548 Fax 01372 742831 NFC House Vickers Industrial Estate infonationwidefilterscom Unit 16 First Quarter Business Park Mellishaw Lane Morecambe wwwnationwidefilterscom Blenheim Road Epsom Lancashire LA3 3EN Surrey KT19 9QN

F6-F9 Rigid Pack CartridgePerformance DetailInitial pressure loss ranging from 80 to 105 Pascals dependent on grade selectionThe NFC lsquoRigid Pack cartridge is available in energy class A or B dependent on grade

Environmental Features Rigid Pack Benefits

Standard depth ndash 300mm Standard depth for all grades provides opportunities for space-saving at AHU design stage

Life-span Can last up to 3 times longer than a conventional bag filter

Energy consumption Lower energy consumption compared with a conventional bag filter due to increased media filtration area

M6-F8 ESB Micro-safe Glass Bags

In some circumstances the ability to switch to a cartridge filter is not feasible

Nationwidersquos ESB Micro-safe Glass Bags provide greater consistency in performancecompared with synthetic bags and in the case of Nationwide they conform to stringentindependent test standards in respect of flammability and toxic smoke emission Full testcertificate available

Performance DetailWhilst installed life and environmental benefits may not be as great as with the BacticellCartridge NFCrsquos lsquostandard classrsquo ESB (Energy Saving Bags ) Micro-safe glass bagfilters can also provide an alternative energy saving option

The range is also available as an NFC lsquoClass Arsquo option catering for additional levels ofprotection against flammability and toxic smoke emission

All NFC ESB (Energy Saving Bags) are manufactured from micro-safe glass fibre tomeet energy class A B or C ndash dependent on number and length of pockets (greatermaterial area reducing operational pressure loss)

Applying EN 779 2012 in conjunction with Eurovent 411 (Energy classification)

Due to the requirement for F7 to F9 filter grades to meet minimum efficiency requirements certain filter types previously available willundoubtedly undergo re-classification

Bag filters manufactured from synthetic materials are most likely as the majority rely on electrostatic properties to enhanceperformanceefficiency Independent tests conducted on many of these products indicate minimum efficiency levels (after discharge) tobe well under 30 for previously graded F7 and F8 classes (Minimum efficiencies now required to be met are 35 for F7 55 for F8and 70 for F9)

Products relying mainly on lsquomechanical propertiesrsquo to achieve filter efficiency requirements (such as glass bag filters and cartridgesmanufactured from filter paper materials) are less likely to require re-classification as these typically achieve minimum efficiency levels(after discharge) in the order of gt50 for F7 and gt70 for F8

In addition to meeting the above requirements air filter manufacturers and suppliers must now support product claims withindependent testing by a laboratory authorised to test products against EN 779 2012 Without such tests being conducted an lsquoenergyrating classificationrsquo to Eurovent 411 cannot be applied

NFC

EN

779-

411

Issu

e 1

The Unique Bacticell Air Filter CartridgeTESTIMONIALS

ldquoThe Bacticell Filters we have fitted in our plant have not only increased the air quality in our food processing facility it has helped us reduce our carbon footprint in 3 ways

1 Reduced our running costs by between 9 to 12 whilst helping us realise cost savings of gtpound7k due to the increased surface area

2 The requirement for filter changes has reduced which means less waste to dispose of

3 Less changes mean less service visits so less fuel used in running vehicles

We are very satisfied with the continued support and innovation provided by the team at Nationwide and hope to continue our partnership with themrdquo

ldquoWe installed the first batch 2 years ago and following their performance we have now changed all our bag filter plants in favour of the BacticellCartridge The installed life of the Bacticells is working out to be virtually 3 times greater than that of the bag filters (as you indicated it would) My filter change labour costs have been reduced considerably as has our waste filter disposalrdquo

ldquoOur site has been upgrading all their Air Handling Units as parts of their energy reduction programme

The upgrade includes replacing bag filters with Bacticell filters which have significantly lower pressure drop and reduce the energy required to run the units

The additional benefit is that they need replacing less often and the modular design reduces the manual handling of the filters

This AHU upgrade programme has currently contributed to a 7 energy reduction across the site rdquo

A

3 filter grades 3 standard face sizes 3 header depths

Initial pressure loss 86 Pascals (F7)100 Pascals (F8) 105 Pascals (F9)

Standard filter depth of only 300mm ndashvaluable space-saving opportunities atdesign stage

Completely interchangeable as replacementsfor standard size bag filters

NFC is the only UK manufacturer to produce acartridge with a re-usable housing reducing wasteat disposal and cost in supplying and fittingreplacement cells

Bacti-G treated water-repellent glass paper isuniformly pleated and sealed into individual cellsthen fitted in a lsquovee-formationrsquo within the housingThe totally rigid structure ensures that the filter willnot sag or collapse under reduced or nil airfloweliminating the possibility of particulate lsquosievingrsquocaused by air turbulence

Energy performancedetail in conjunctionwith Eurovent 411 fora Grade F8 Bacticelltested in accordancewith EN 779 2012

Nominal Air flow 0944 m3s EN779Initial efficiency 04 microm 68 Minimum efficiency 04 microm 68 Annual energy consumption 1345 kWhannum

Environmental Features Unique Benefits from the Bacticell Air Filter Cartridge

Re-usable housing Lower waste disposal costs

Replacable filter cells Less down-time at filter changeLighter and less bulky to transport

Bacti-G anti-microbial protection

Eradicates bacterialfungal growth on contact to reduce contamination of ductwork and occupied areas and reduces health risk for engineers at filter change

Energy consumption Uses up to 30 less fan energy compared to an equivalent grade bag filter

Flammability amp toxicsmoke emission

Entire filter conforms to stringent independent test standards in respect offlammability and toxic smoke emission Full test certificate available

This list represents some of the micro-organisms that can be eradicated upon contact with the Bacticell CartridgeBACTERIASalmonellaE-coliListeria SpPseudomonas SpProteus SpKlebsiella SpFlavobacterium SpBacillus SpAlcaligenes SpStrep faecalisStaph aureus

Aeromonas SpAchrombacteria SpProt vulgarisClost welchiiStrep mutansMRSAEcoli lsquo0157rsquoLegionella

FUNGIStreptomyces SpAspergillus Sp

Cephalosporium SpFusarium SpPaecilomyces SpCladosporium SpPenicillum Sp

ALGAEChlorella SpOscillatoriaNaviculaScenedesmusMelsira

YEASTConiophgoraputeanaMonilia albicansCandida SpRhodotorula SpCryptococcusSacchromyces

VIRAL CHALLENGEMS2 coliphage(synthetic test virus)

ldquothe benefits of the Bacticell Air Filter Cartridge extend beyond its primary function as an alternative

to the conventional bag filter rdquo(HampV News Judges 2012)

This cartridge provides a low-cost option for clients wishing to receive the benefits of a rigidstructure to avoid the risk of bags deflating or sagging and the potential to make some energysavings as a result of a lower initial pressure loss However the unit requires completedisposal

The filter is constructed from high efficiency glass paper close pleated and separated by lsquohot-meltrsquo beeds The pleat packs are then sealed within a heat resistant plastic case with anintegral header frame

FOR FURTHER INFORMATIONNORTHERN OFFICE SCOTLAND OFFICE SOUTHERN OFFICESales amp Technical Enquiries Manufacture TelFax 01355 226811 Contract ManagementTel 01524 389713 Fax 01524 555769 Tel 01372 728548 Fax 01372 742831 NFC House Vickers Industrial Estate infonationwidefilterscom Unit 16 First Quarter Business Park Mellishaw Lane Morecambe wwwnationwidefilterscom Blenheim Road Epsom Lancashire LA3 3EN Surrey KT19 9QN

F6-F9 Rigid Pack CartridgePerformance DetailInitial pressure loss ranging from 80 to 105 Pascals dependent on grade selectionThe NFC lsquoRigid Pack cartridge is available in energy class A or B dependent on grade

Environmental Features Rigid Pack Benefits

Standard depth ndash 300mm Standard depth for all grades provides opportunities for space-saving at AHU design stage

Life-span Can last up to 3 times longer than a conventional bag filter

Energy consumption Lower energy consumption compared with a conventional bag filter due to increased media filtration area

M6-F8 ESB Micro-safe Glass Bags

In some circumstances the ability to switch to a cartridge filter is not feasible

Nationwidersquos ESB Micro-safe Glass Bags provide greater consistency in performancecompared with synthetic bags and in the case of Nationwide they conform to stringentindependent test standards in respect of flammability and toxic smoke emission Full testcertificate available

Performance DetailWhilst installed life and environmental benefits may not be as great as with the BacticellCartridge NFCrsquos lsquostandard classrsquo ESB (Energy Saving Bags ) Micro-safe glass bagfilters can also provide an alternative energy saving option

The range is also available as an NFC lsquoClass Arsquo option catering for additional levels ofprotection against flammability and toxic smoke emission

All NFC ESB (Energy Saving Bags) are manufactured from micro-safe glass fibre tomeet energy class A B or C ndash dependent on number and length of pockets (greatermaterial area reducing operational pressure loss)

Applying EN 779 2012 in conjunction with Eurovent 411 (Energy classification)

Due to the requirement for F7 to F9 filter grades to meet minimum efficiency requirements certain filter types previously available willundoubtedly undergo re-classification

Bag filters manufactured from synthetic materials are most likely as the majority rely on electrostatic properties to enhanceperformanceefficiency Independent tests conducted on many of these products indicate minimum efficiency levels (after discharge) tobe well under 30 for previously graded F7 and F8 classes (Minimum efficiencies now required to be met are 35 for F7 55 for F8and 70 for F9)

Products relying mainly on lsquomechanical propertiesrsquo to achieve filter efficiency requirements (such as glass bag filters and cartridgesmanufactured from filter paper materials) are less likely to require re-classification as these typically achieve minimum efficiency levels(after discharge) in the order of gt50 for F7 and gt70 for F8

In addition to meeting the above requirements air filter manufacturers and suppliers must now support product claims withindependent testing by a laboratory authorised to test products against EN 779 2012 Without such tests being conducted an lsquoenergyrating classificationrsquo to Eurovent 411 cannot be applied

NFC

EN

779-

411

Issu

e 1

This cartridge provides a low-cost option for clients wishing to receive the benefits of a rigidstructure to avoid the risk of bags deflating or sagging and the potential to make some energysavings as a result of a lower initial pressure loss However the unit requires completedisposal

The filter is constructed from high efficiency glass paper close pleated and separated by lsquohot-meltrsquo beeds The pleat packs are then sealed within a heat resistant plastic case with anintegral header frame

FOR FURTHER INFORMATIONNORTHERN OFFICE SCOTLAND OFFICE SOUTHERN OFFICESales amp Technical Enquiries Manufacture TelFax 01355 226811 Contract ManagementTel 01524 389713 Fax 01524 555769 Tel 01372 728548 Fax 01372 742831 NFC House Vickers Industrial Estate infonationwidefilterscom Unit 16 First Quarter Business Park Mellishaw Lane Morecambe wwwnationwidefilterscom Blenheim Road Epsom Lancashire LA3 3EN Surrey KT19 9QN

F6-F9 Rigid Pack CartridgePerformance DetailInitial pressure loss ranging from 80 to 105 Pascals dependent on grade selectionThe NFC lsquoRigid Pack cartridge is available in energy class A or B dependent on grade

Environmental Features Rigid Pack Benefits

Standard depth ndash 300mm Standard depth for all grades provides opportunities for space-saving at AHU design stage

Life-span Can last up to 3 times longer than a conventional bag filter

Energy consumption Lower energy consumption compared with a conventional bag filter due to increased media filtration area

M6-F8 ESB Micro-safe Glass Bags

In some circumstances the ability to switch to a cartridge filter is not feasible

Nationwidersquos ESB Micro-safe Glass Bags provide greater consistency in performancecompared with synthetic bags and in the case of Nationwide they conform to stringentindependent test standards in respect of flammability and toxic smoke emission Full testcertificate available

Performance DetailWhilst installed life and environmental benefits may not be as great as with the BacticellCartridge NFCrsquos lsquostandard classrsquo ESB (Energy Saving Bags ) Micro-safe glass bagfilters can also provide an alternative energy saving option

The range is also available as an NFC lsquoClass Arsquo option catering for additional levels ofprotection against flammability and toxic smoke emission

All NFC ESB (Energy Saving Bags) are manufactured from micro-safe glass fibre tomeet energy class A B or C ndash dependent on number and length of pockets (greatermaterial area reducing operational pressure loss)

Applying EN 779 2012 in conjunction with Eurovent 411 (Energy classification)

Due to the requirement for F7 to F9 filter grades to meet minimum efficiency requirements certain filter types previously available willundoubtedly undergo re-classification

Bag filters manufactured from synthetic materials are most likely as the majority rely on electrostatic properties to enhanceperformanceefficiency Independent tests conducted on many of these products indicate minimum efficiency levels (after discharge) tobe well under 30 for previously graded F7 and F8 classes (Minimum efficiencies now required to be met are 35 for F7 55 for F8and 70 for F9)

Products relying mainly on lsquomechanical propertiesrsquo to achieve filter efficiency requirements (such as glass bag filters and cartridgesmanufactured from filter paper materials) are less likely to require re-classification as these typically achieve minimum efficiency levels(after discharge) in the order of gt50 for F7 and gt70 for F8

In addition to meeting the above requirements air filter manufacturers and suppliers must now support product claims withindependent testing by a laboratory authorised to test products against EN 779 2012 Without such tests being conducted an lsquoenergyrating classificationrsquo to Eurovent 411 cannot be applied

NFC

EN

779-

411

Issu

e 1