Clean air solutions

EN779:2012 &Eurovent Energy Efficiency Classification

Steve Devine

Clean air solutions

Eurovent Energy Efficiency Classification

• Energy rating system using EN779:2012• Advantages

– Independent label• Makes filters comparable

– Escape price discussions• Talk about IAQ and• Energy

– Select best solution• Energy saving (Eurovent) • IAQ (EN779:2012) • Minimum efficiency (EN779:2012)

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Clean air solutions

What´s needed to be able to classify filters

• EN779:2012 test rig

• ASHRAE Dust feeding

• EN779:2012 Test Report

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Clean air solutions

Outdoor air ASHRAE DustAirborne Particulate Size

Average Diameter ~0.08mm Average Diameter ~7.7mm100x difference in size, so what does loading with ASHRAE dust tell you?

Answer: How your filter will perform when it is challenged with ASHRAE dust,Do you have ASHRAE dust in your system???

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ASHRAE Dust ΔP vs. Real Life ΔP

Simple averaging ΔP(DPI+DPF)/2 = 0.75” WG

DPI

DPF

Actual Average ΔP DPF

Dx DPI

DP ASHRAE Dust = 0.63” WGDP ”Real Life” = 0.46” WG

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So is ASHRAE Dust a Problem?• It is an acceptable compromise• This procedure is a Method of

Calculation using existing test data– EN779 uses ASHRAE test dust– Data is available

• Generally, a filter with a “better” ASHRAE loading curve will have a lower energy cost– Better than any alternative method

available at this time– Not 100% true– LCC Green will correct the ones that fail

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Clean air solutions

The system is available in Europe

”Low energy consumption in combination with a high indoor air quality.”

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Clean air solutions

ASHRAE and ISO?

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• ASHRAE – Guideline Project Committee is forming

• Proposed method is similar – Uses ASHRAE dust loading

• Proposed method is different– Data from 52.2, ISO 16890 or EN779

– 4-5 years minimum from a document• ISO

– Started a Work Item in 2011– Stopped the WI in 2012

• Project is on hold– If it gets started again, it will also be 4-5 years

from a document

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How would our USA products rate?

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Filter Class

G4 / MERV 8

M5 / MERV 9-10

M6 / MERV 11-12

F7 / MERV 13

F8 / MERV 14

Min Load 350g 250g 250g 100g 100g

Min Eff ≥ 35% ≥ 55%

A 0 – 600 0 – 650 0 – 800 0 – 1200 0 – 1600

B >600 – 700 >650 – 780 >800 – 950 >1200 – 1450 >1600 – 1950

C >700 – 800 >780 – 910 >950 – 1100 >1450 – 1700 >1950 – 2300

D >800 – 900 >910 – 1040 >1100 – 1250 >1700 – 1950 >2300 – 2650

E >900 – 1000 >1040 – 1170 >1250 – 1400 >1950 – 2200 >2650 – 3000

F >1000 – 1100 >1170 – 1300 >1400 – 1550 >2200 – 2450 >3000 – 3350

G >1100 >1300 >1550 >2450 >3350

• All Values are calculated kWh per Eurovent 4/11

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How would some USA products do in Eurovent 4/11?

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Filter Efficiency kWh Eurovent Rating

Hi-Flo ES, 22” M13 (F7) 1197 A

Hi-Flo ES, 12” M13 (F7) 2195 E

Durafil ES M13 M13 (F7) 959 A

Durafil 2V M13 M13 (F7) 1576 C

AAF VXL M13 (F7) 1117 A

Riga-Flo M13 (F7) 1666 C

AP-3 M8 (G4) 12980 G

30/30 M8 (G4) 4196 G

AAF PP HC M8 (G4) 24417 G• The lower the kWh value the better the performance • Why are any of you buying a 12” HF ES????• Difference between 4V and 2V• AAF VXL has a better kWh than the HF ES, but not in the field…• Aeropleat – Not Good, but What – 30/30???• AAF PP has same rating as a 30/30…

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The biggest issues facing ASHRAE and ISO

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• The USA uses pleated filters– Based on energy, pleats are horrible products

• The Eurovent methodology shows NO differentiation between any pleats– The AP3 and 30/30 are both a “G”– The AAF PP is also a “G” at ½ the 30/30 price

• This is the problem facing ASHRAE and ISO– The ASHRAE and ISO methods will have to show

differentiation of pleated filters– Similar to why there is an Arrestance test method

and a Particle Removal Efficiency test method – different levels of filtration

Clean air solutions

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