1. Changes and Challenges of 52.2 and ISO Update
Michael Corbat
April 16, 2015

2. Bio Senior Product Engineer with Filtration Group for 14 years
Bachelor of Science Engineering Management – Western Michigan University
MBA from Northern Illinois University
Chair of ASHRAE Standard 52.2
Chair of ASHRAE Technical Committee 2.4 Standards Subcommittee
Voting Member of ASHRAE Technical Committee 2.4
Voting Member of ASHRAE Guideline Committee 35
US Expert to ISO TC 142/Working Group 9 - Particulate air filter intake systems for rotary machinery and stationary internal combustion engines

3. Agenda 52.2 ISO 16890 Other ISO TC 142 Documents
Residential Test Standard
Energy Usage Guidelines

4. 2015 Supplement MERV Table Changes8
n/a
20 ≤ E2
70 ≤ E3 9
35 ≤ E2
75 ≤ E3 10
50 ≤ E2
80 ≤ E3 11
20 ≤ E1
65 ≤ E2
85 ≤ E3 12
35 ≤ E1
80 ≤ E2
90 ≤ E3 13
50 ≤ E1
85 ≤ E2 14
75 ≤ E1
90 ≤ E2
95 ≤ E3 15
85 ≤ E1 16
95 ≤ E1
95 ≤ E2

5. 2015 Supplement MERV Table Changes Reporting
Old Reports are allowed to be recalculated
Must be 2012 or newer
Must meet all requirements of 2015 supplement (Shedding and Humidity)
Must have “Recalculated” and reprint date on report
Must still contain original test information including date
All new reports must contain language “ with Supplement”

6. 2015 Supplement Relative Humidity
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

7. 2015 Supplement Shedding Calculation
Standardizes time for measuring shedding – 20 min
Downstream background shall be no more than 5% greater than upstream during challenge
Will not affect most tests

8. Approved Addendum Particle Counter Change
Resolution would require the use of Optical Particle Counter
Goal: Reduce variation
Will be published in June

9. 52.2 Proposed Items Items that will be discussed in June
Full test only to use MERV
Efficiency data must be included in report
E values included in reporting value
Example MERV 12-80/90
Optional Appendix for multi-stage filter testing
Mandatory Appendix J has been voted down

10. 52.2 Research Primary Project Independent Round Robin
Repeat of ASHRAE RP-1088
Will follow inclusion of all changes
Goal to determine ruggedness of test method

11. 52.2 Research 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

12. ISO 16890
Four Parts
Part 1
Classification System
Voted to Final Draft International Standard (FDIS) in March
Part 2
Efficiency Testing
Voted to FDIS in February
Part 3
Dust Loading
Voted to DIS in January
Part 4
Discharge Method
Likely fully published by end of 2015 or early 2016

13. ISO 16890 16890 - Testing Sequence 52.2 – Testing Sequence
Resistance vs Airflow
Fractional Efficiency – Run similarly to 52.2
IPA Vapor Discharge
Fractional Efficiency
Dust Loading on 20% Increments
52.2 – Testing Sequence
Resistance vs Airflow
Fractional Efficiency
Conditioning Load/Appendix J
25% Dust Load
50% Dust Load
75% Dust Load
100% Dust Load

14. ISO Data Calculation

15. ISO 16890 ≥ 50% ≥ 40% Group Name Requirement Class Reporting Value
Emin(PM1)
E(PM1)
Emin(PM2.5)
E(PM2.5)
E(PM10)
ISO Coarse
----
< 50%
Arrestance
ISO PM10
≥ 50%
ISO PM2.5
≥ 40%
ISO PM1

16. ISO 16890 16890 Outputs Filter Rating Read ISO__%PM__
PM value rounded to closest 5%
Initial Pressure Drop
PM1, PM2.5, PM10 (Average)
PM1 (min), PM2.5 (min)
Initial Arrestance
First 30g or 0.6”WC
Average Arrestance
DHC
52.2 Outputs
MERV
Initial Pressure Drop
E1, E2, and E3
Average Arrestance
DHC
Non-Required Outputs
MERV-A
E1, E2 and E3 per Appendix J

17. 16890 vs 52.2 Standard Capacity Pleat
Initial DP = 0.24” WC
Filter Rating ISO 90%Arrestance
PM1 = 9%
PM2.5 = 28%
PM10 = 42%
PM1(min) = 9%
PM2.5(min) = 28%
Initial Arrestance = 89%
Average Arrestance = 93%
DHC = 106g
52.2
Initial DP = 0.24” WC
MERV 1970 cfm
E1 = 10
E2 = 46
E3 = 57
Arrestance = 91.5%
1.5” = 94g

18. 16890 vs 52.2 95% Fiberglass V-bank 16890 52.2 Initial DP = 0.42” WC
Filter Rating ISO 80%PM1
PM1 = 80%
PM2.5 = 88%
PM10 = 94%
PM1(min) = 81%
PM2.5(min) = 88%
Initial Arrestance = 100%
Average Arrestance = 100%
1.5” = 502 g
52.2
Initial DP = 0.42” WC
MERV 1970 cfm
E1 = 81
E2 = 97
E3 = 100
Arrestance = 99.9%
1.5” = 446 g

19. 16890 vs 52.2 95% Synthetic V-bank 16890 52.2 Initial DP = 0.28” WC
Filter Rating ISO 70%PM2.5
PM1 = 56%
PM2.5 = 70%
PM10 = 83%
PM1(min) = 27%
PM2.5(min) = 50%
Initial Arrestance = 100%
Average Arrestance = 99%
DHC = 335g
*Average Effiency of Discharge & Initial = MERV 13
52.2
Initial DP = 0.28” WC
MERV 1970 cfm
E1 = 86
E2 = 97
E3 = 99
Arrestance = 99.6%
1.5” = 299 g
MERV A = 13-A
E1A = 67
E2A = 91
E3A = 98

20. ASHRAE Residential Standard
Will be formally proposed to ASHRAE in June
New committee will be formed
Outside scope of 52.2
Base will be from 52.2 with a primary focus of PM 2.5
Filter conditioning not likely
Minimum 2 years off
AHRI method a possibility

21. Other ISO Standard Work
Field testing of general ventilation filtration devices
Replaced ASHRAE GPC 26
ISO
High-efficiency filters and filter media for removing particles in air
5 parts
Testing of HEPA filters

22. Sustainability Both ISO and ASHRAE are handling ASHRAE GPC 35 ISO WG12
Both are in very early stages of work
GPC 35 is requesting a research project for new loading dust
Calculation portion is being worked on simultaneously