Changes to ANSI/ASHRAE Standard 52.2. Now and What’s Coming! Michael Corbat April 4, 2014.
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Transcript of Changes to ANSI/ASHRAE Standard 52.2. Now and What’s Coming! Michael Corbat April 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
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MERV Table Changes & Clarifications
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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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