Changes to ANSI/ASHRAE Standard 52.2. Now and What’s Coming!Michael CorbatApril 4, 2014

Agenda

1. Current Approved Changes– Relative Humidity– MERV Table– Particle Counter– Shedding Calculation

2. Upcoming Research3. Proposed Changes– Mandatory Use of Appendix J– Elimination of Intermediate Dust Loadings– IPA Vapor Discharge– Change Reporting Values

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Previous Range 20-65% RH ASHRAE RP-1287 Showed

Major E2 and E3 Variations New Range 45% ± 10 Measured at filter under

flow Fully Incorporated into

Standard

Relative Humidity

3

MERV Table Changes & Clarifications

4

MERV E1 E2 E38 n/a 20 ≤ E2 70 ≤ E3

9 n/a 35 ≤ E2 75 ≤ E3

10 n/a 50 ≤ E2 80 ≤ E3

11 20 ≤ E1 65 ≤ E2 85 ≤ E3

12 35 ≤ E1 80 ≤ E2 90 ≤ E3

13 50 ≤ E1 85 ≤ E2 90 ≤ E3

14 75 ≤ E1 90 ≤ E2 95 ≤ E3

15 85 ≤ E1 90 ≤ E2 95 ≤ E3

16 95 ≤ E1 95 ≤ E2 95 ≤ E3

Resolution would require the use of Optical Particle Counter

Goal: Reduce variation 3 Open Public Review Comments to Address No major implication to test results

Particle Counter Change

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Standardizes time for measuring shedding – 20 min

Downstream shall be no more than 5% greater than upstream

Will not affect most tests One committee member opposed Public Review Closed

Shedding Calculation

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ASHRAE SSPC 52.2 has created a formal research committee

Keith Chesson, Clarcor Air Filtration is Chair First SPC to be have its own Research Committee Separate work for 52.2 specific from general TC 2.4 work

Research

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Primary Project Independent Round Robin Repeat of ASHRAE RP-1088 Will follow inclusion of all changes Goal to determine ruggedness of test method

Research Project

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Second Project Independent round robin of Appendix J Compare with IPA Vapor standard being developed by

ISO Goal – to determine repeatability and reproducibility for

both methods Awaiting completion of the formal IPA Vapor method

Research Project

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Appendix J was proposed to become mandatory Has been tabled until June meeting Would directly replace current conditioning step Motion was amended to remove intermediate dust

loadings

Possible Upcoming Changes – Appendix J

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Continued pursuit of IPA Vapor Discharge Would use protocol being developed at ISO Reported value would be determined based on average

of initial and discharge–Early data has shown this to represent Appendix J

conditioningBenefits –Speed –Cost –Repeatabily

Possible Upcoming Changes – IPA Vapor

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Elimination of MERV Reduction of number of MERVs More relatable to EPA PM1, PM2.5 and PM10–E1, E2 and E3 line up very closely

Discussions on how to approach–New classification system–Simply percent at each (e.g. PM1-90%)

Possible Upcoming Changes – Reporting Value

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Research has shown ASHRAE dust no longer reflects “real life”

ASHRAE dust does not support depth loading products ASHRAE test dust can fall off during testing Working with GPC-35 to determine dust for energy

classification Complicated by MERVs 1-4

Possible Upcoming Changes – Loading Dust

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Filters tested as system – Prefilter/Final Filter Nano Particulate Testing Filter Shedding ISO 16890 will likely be released mid-2015

Possible Upcoming Changes - Other

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