1. What Has the New MERV Table Done to My Products?
Michael Corbat, CAFS Engineering Manager
Custom Filter LLC

2. What Has the New MERV Table Done to My Products?!
Custom Filter LLC
What Has the New MERV Table Done to My Products?!
Michael Corbat
April 7, 2016

3. Bio Engineering Manager at Custom Filter LLC
15 Years Experience in Filtration Development
Bachelor of Science Engineering Management – Western Michigan University
MBA from Northern Illinois University
Chair of ASHRAE Standard 52.2
Secretary 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

4. Agenda 52.2 ISO 16890 Update Energy Usage Guidelines
MERV Table Changes
Other Changes
ISO Update
Energy Usage Guidelines

5. 2015 Supplement MERV Table Changes8
n/a
70 ≤ E3 9
E2 < 50
85 ≤ E3 10
50 ≤ E2 < 65 11
65 ≤ E2 <80 12
80 ≤ E2
90 ≤ E3 13
50 ≤ E1< 75
90 ≤ E2 14
75 ≤ E1 < 85 15
85 ≤ E1 < 95 16
95 ≤ E1
95 ≤ E2
95 ≤ E3

6. 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

7. PLEATS - MERV Before MERV 8 MERV 8 MERV 8 E1 = 5 E2 = 35 E3 = 70

8. PLEATS - MERV After MERV 8 MERV 9 MERV 10 E1 = 5 E2 = 35 E3 = 70

9. MERV 13 is Easier
MERV 12
E1 = 50
E2 = 85
E3 = 90
NOW IS A MERV 13!!

10. What to Look For 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 2015 Supplement”

11. Approved Addendum Addendum C – Must use optical particle counters
Addendum E – Full test must be performed to use MERV
Addendum F – All efficiency data sets must be published (12 channels at 6 efficiency tests)

12. 52.2 Proposed Items Optional Appendix for multi-stage filter testing
E values included in reporting value
MERV 14 (E1>=75%, E2>=90%, 1970 CFM
52.3?

13. 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

14. 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

15. ISO Data Calculation

16. 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

17. ISO 16890 Outputs Filter Rating Read ISO__%ePM__ Initial Pressure Drop
PM value rounded down to closest 5%
Initial Pressure Drop
ePM1, ePM2.5, ePM10 (Average)
ePM1 (min), ePM2.5 (min)
Initial Arrestance
First 30g or 0.6”WC
Average Arrestance
DHC

18. 16890 Sample Data Initial DP = 0.35” WC Filter Rating ISO 70% ePM1
ePM1(min) = 41%
ePM2.5(min) = 53%
Initial Arrestance = 95%
Average Arrestance = 99%
DHC = 300g

19. 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