1. Resolving Common Problems with Developing Louver Catalogs

2. Table of Contents Purpose Free Area Chart Air Performance Rating
Water Penetration Rating
Wind-Driven Rain Rating
Sound Performance Rating
Catalog Identification
Seals and Statement
Resource and Contact

3. Purpose Help manufacturers develop the catalogs
Reduce catalog checking time

4. Free Area Chart

5. Horizontal Blade Louver Dimension
A = Minimum distance between the head and top blade B = Minimum distance between the sill and bottom blade C = Minimum distance between adjacent blades N = Number of C openings L = Minimum distance between louver jambs W = louver width H = louver height

6. Vertical Blade Louver Dimension
A = Minimum distance between the left jamb and left blade B = Minimum distance between the right jamb and right blade C = Minimum distance between adjacent blades N = Number of C openings L = Minimum distance between louver head and sill W = Louver width H = Louver height

7. Free Area Calculation
Free Area = L [A+B+ N X C ] Percent Free Area = L [A+B+ N X C ]100 W X H

8. Typical Free Area Chart
Louver catalog has to have a Free Area Chart. The maximum increment can not be more than 305 mm (12 in).
Typical Free Area Chart
Ref: AMCA (Rev ) Section 8.3.5

9. Air Performance

10. Air Performance Ratings
Air performance ratings have to include the following data:
Maximum pressure drop (ΔPs)
Flow direction intake and/or exhaust
Ref: AMCA (Rev ) Section 8.3.1

11. Air Performance Ratings
Following statements have to be in the catalog:
“Data corrected to standard air density”
AMCA figure or figures in which air performance was tested
Test sample size
Ref: AMCA (Rev ) Section 8.3.1

12. Drawing the Graph The line was plotted based on this data. Test Report
Approved Catalog
The line was plotted based on this data.

13. Test Mode (Flow Direction) in the Graph
Test Report
Approved Catalog

14. Figure No. in the Graph
Test Report
Approved Catalog

15. Rounding of data for y-axis
IP unit
Pressure drop ≥ in w.g. Data shall be rounded to maximum of two digits after the decimal point
Pressure drop ≤ in w.g. Data shall be rounded to maximum of three digits after the decimal point
Free Area Velocity
Pressure Drop
fpm
in wg
592
0.008
793
0.020
1191
0.042
1591
0.079
2002
0.121
Wrong
Free Area Velocity
Pressure Drop
fpm
in wg
592
0.008
793
0.02
1191
0.04
1591
0.08
2002
0.12
Right
Ref. AMCA (Rev ) Section 8.3.2

16. Rounding of data for y-axis
SI unit
Pressure drop ≥ 1 Pa Data shall be rounded to nearest Pascal
Pressure drop ≤ 1 Pa Data shall be rounded to one digit after the decimal point
Free Area Velocity
Pressure Drop
(m/s)
(Pa)
3.02
2.49
4.04
4.98
6.07
10.46
8.11
19.68
10.21
30.14
Wrong
Right
Free Area Velocity
Pressure Drop
(m/s)
(Pa)
3.02 2
4.04 5
6.07 10
8.11 20
10.21 30
Ref. AMCA (Rev ) Section 8.3.2

17. Extrapolation
The air performance curve can be extrapolated with broken line with smooth continuation of the adjacent portion.
The extrapolation shall not be more than 50% of the static pressure range of the test either upwards of downwards.

18. Extrapolation Example
Approved Catalog
The air performance curve can be extrapolated with broken line with smooth continuation of the adjacent portion. The extrapolation shall not be more than 50% of the static pressure range of the test either upwards of downwards.
Example: According to the test report below,
static pressure drop varies 0.023” to 0.409”. The curve can be extrapolated to ( )/2 = 0.193” more than 0.409”. The line can be extended to 0.409” ” = 0.602”.
Ref. AMCA (Rev ) Section 8.3.3

19. Water Penetration

20. Water Penetration
The Beginning point of water penetration (3.05 g/m2 or 0.01 oz/ft2) is defined as the free area velocity at which water begins to pass through the louver. It shall be in form of statement.
Example:
The beginning point of water penetration for Model ABC 007 is 913 fpm free area velocity.
Ref. AMCA (Rev ): Section

21. Water Penetration Curve
Approved Catalog
Published ratings may be shown as a curve of water penetration in accordance with the regression formula.
Ref. AMCA (Rev ): Section

22. Ordinate of Water Penetration Curve
Approved Catalog
Ordinate (y-axis): The ordinate shall be from 0 to 100 mL (0 to 0.3 oz) of water penetration m2 (ft2) free area.
Ref. AMCA (Rev ): Section

23. Abscissa of Water Penetration Curve
Approved Catalog
The minimum abscissa velocity shall start on an even 0.5m/s (100 fpm) more than 0.3 m/s (60 fpm) below the velocity at the beginning of water penetration.
For example, the beginning point of water penetration is 961 fpm.
961-60=901
The minimum abscissa velocity shall start on 900 fpm.
But if the beginning point of water penetration is 951 fpm, the minimum abscissa velocity shall start on 800 fpm.
Ref. AMCA (Rev ): Section

24. The beginning point of water penetration curve
Approved Catalog
The starting point of water penetration curve shall be marked and/or labelled.
AMCA (Rev ): Section

25. Louver Information in Water Penetration Curve
Approved Catalog
The Louver test size and test duration shall be included on the published results of each catalog series.
Ref. AMCA (Rev : Section

26. Beginning Point of Water Penetration in the Graph
Approved Catalog
Test Report

27. Wind Driven Rain

28. Wind-Driven Rain Approved Catalog
Published rating shall include the following:
Wind velocity
Rainfall rate
Core velocity
Effectiveness
Penetration class
Discharge loss
Ref. AMCA (Rev ): Section 9.3.1

29. WDR Data from Test Report
Approved Catalog

30. Sound Performance for Acoustical Louver

31. Sound Performance Rating Requirement
Acoustical ratings shall be as free field noise reduction (dB) in the 2nd through 7th octave bands.
Example from Approved Catalog
Ref. AMCA (Rev ): Section

32. Sound Transmission Loss
Test Report
Approved Catalog

33. Sound Performance Data
Test Report
Approved Catalog

34. Catalog Identification

35. Catalog Identification
Approved Catalog
Catalog identification reference (e.g. Catalog No. XXX Rev. 1), and unabbreviated current catalog date, (e.g. November 2004) shall be on the outside front or back cover.
Where ratings are on separate sheets or on loose leaf that may be removed from the cover, each sheet or loose leaf shall be identified and dated as above.
Ref. AMCA (Rev ): Section

36. Seal and Statements

37. Qualifying Statement
“(Licensee's name as shown on License Agreement) certifies that the (product description) shown herein is (or are) licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 511 and comply with the requirements of the AMCA Certified Ratings Program.”
ABC Corporation certifies that Models AB707; UA777 and AA631 are licensed to bear the AMCA
Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 511 and comply with the requirements of the AMCA Certified Ratings Program. The AMCA Certified Ratings Seal applies to water penetration, air performance and wind-driven rain.
Ref. AMCA (Rev ) Section 5.1 and Section 5.2

38. Other Statements
The qualifying statement shall be shown on the inside cover or first page, or prominently on a subsequent page.
Please indicate which products are licensed, and on what pages the certified ratings are shown.
If the catalog contains all licensed products, the seal and qualifying statement shall be prominently displayed either on the cover or in the catalog.
If the catalog contains both licensed and unlicensed products, the AMCA Seal and qualifying statement shall not be shown on the outside cover.
Ref. AMCA (Rev ) Section 11.4

39. Resource
AMCA Publication (Rev ) Certified Ratings Program Product Rating Manual for Air Control Devices AMCA Publication (R2008) (Rev. 10/13) Operating Manual