| Extruded Aluminum Louvers Formed Metal Specialized Other Products Accessories |
| Drainable Blades Extra Performance Series Storm Performance Hurricane Approved |
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EFFECTIVENESS RATINGS @ VARIOUS FREE AREA VELOCITIES*
Intake Free Area Velocity FPM (m/MIN) |
0
0 |
150
(45) |
300
(91) |
450
(137) |
600
(182) |
750
(228) |
900
(274) |
1050
(300) |
1200
(365) |
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| SP-437V |
Vertical |
.081 |
4" |
45% |
| Class A (478 FPM) |
Class B
(579 FPM) |
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| SP-537 |
Double
Slope
Drainable |
.081 |
5" |
50% |
| Class A (854 FPM) |
Class B
(1039 FPM) |
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| SP-737 |
Continuous
Line |
.063/.081 |
7" |
48.5% |
| Class A (575 FPM) |
Class B
(729
FPM) |
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| SP-837 |
Triple
Slope
Drainable |
.081 |
8" |
50% |
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AMCA Effectiveness Ratings:
A = Excellent 100 - 99% |
B = Good 98.9 - 95% |
C = Medium 94.9 - 80% |
D = Poor 79.9 - 0% |
*Louvers have been tested under the following simulated condiotions: Wind velocity - 29.1 mph; Rainfall rate 3 inches/hr |