Acoustical louvers are designed to reduce noise transmission while protecting air intake and exhaust openings. These non-drainable models feature airfoil blades filled with fire- and water-resistant, sound-absorbing insulation to attenuate noise from heavy equipment and mechanical systems. Available in a range of frame depths, blade angles, and spacings, they are constructed from aluminum or steel to meet both acoustic and architectural requirements.
| Model | Octave Band Frequency (Hz) |
63 | 125 | 250 | 500 | 1000 | 2000 | 4000 | 8000 |
|---|---|---|---|---|---|---|---|---|---|
| LAA-66 | Transmission Loss (dB) | 1 | 6 | 6 | 9 | 13 | 15 | 14 | 14 |
| Free Field Noise Reduction (dB) | 7 | 12 | 12 | 15 | 19 | 21 | 20 | 20 | |
| LAA-86 | Transmission Loss (dB) | 1 | 4 | 5 | 9 | 16 | 19 | 16 | 13 |
| Free Field Noise Reduction (dB) | 7 | 10 | 11 | 15 | 22 | 25 | 22 | 19 | |
| LAA-88 | Transmission Loss (dB) | 1 | 5 | 6 | 9 | 13 | 16 | 13 | 11 |
| Free Field Noise Reduction (dB) | 7 | 11 | 12 | 15 | 19 | 22 | 19 | 17 | |
| LAA-129 | Transmission Loss (dB) | 2 | 8 | 12 | 16 | 23 | 28 | 25 | 17 |
| Free Field Noise Reduction (dB) | 8 | 14 | 18 | 22 | 29 | 34 | 31 | 23 | |
| LAA-1212 | Transmission Loss (dB) | 5 | 7 | 8 | 13 | 19 | 14 | 11 | 9 |
| Free Field Noise Reduction (dB) | 15 | 13 | 14 | 19 | 25 | 20 | 17 | 15 | |
| LAA-1215 | Transmission Loss (dB) | 2 | 6 | 6 | 9 | 12 | 11 | 9 | 11 |
| Free Field Noise Reduction (dB) | 8 | 12 | 12 | 15 | 18 | 17 | 15 | 17 | |
| LAA-12AF | Transmission Loss (dB) | 7 | 6 | 7 | 13 | 15 | 13 | 10 | 9 |
| Free Field Noise Reduction (dB) | 14 | 12 | 14 | 19 | 21 | 19 | 16 | 15 |
| Model | Octave Band | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |
|---|---|---|---|---|---|---|---|---|---|---|
| Frequency (Hz) | 63 | 125 | 250 | 500 | 1000 | 2000 | 4000 | 8000 | ||
| LAA-66 | Transmission Loss (dB) | 1 | 6 | 6 | 9 | 13 | 15 | 14 | 14 | |
| Free Field Noise Reduction (dB) | 7 | 12 | 12 | 15 | 19 | 21 | 20 | 20 | ||
| LAA-86 | Transmission Loss (dB) | 1 | 4 | 5 | 9 | 16 | 19 | 16 | 13 | |
| Free Field Noise Reduction (dB) | 7 | 10 | 11 | 15 | 22 | 25 | 22 | 19 | ||
| LAA-88 | Transmission Loss (dB) | 1 | 5 | 6 | 9 | 13 | 16 | 13 | 11 | |
| Free Field Noise Reduction (dB) | 7 | 11 | 12 | 15 | 19 | 22 | 19 | 17 | ||
| LAA-129 | Transmission Loss (dB) | 2 | 8 | 12 | 16 | 23 | 28 | 25 | 17 | |
| Free Field Noise Reduction (dB) | 8 | 14 | 18 | 22 | 29 | 34 | 31 | 23 | ||
| LAA-1212 | Transmission Loss (dB) | 9 | 7 | 8 | 13 | 19 | 14 | 11 | 9 | |
| Free Field Noise Reduction (dB) | 15 | 13 | 14 | 19 | 25 | 20 | 17 | 15 | ||
| Model | Description | Blade | Frame | Free Area | Water Penetration Rating (WPR) Feet/minute |
Pressure Drop @ WPR inches W.C. |
Air Flow SCFM |
Material Thickness (Frame/Blade/Perf) Inches |
Certification Rating | Single Panel Size | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Orientation H - Horiz. V - Vert. |
Angle Deg. |
Spacing Inches |
Depth Inches |
Sq. Ft. | % | AMCA | STC Class | Min W x H Inches |
Max W x H Inches |
||||||
| LAA-66 | Fixed Non-drainable | H | 45.0 | 6.00 | 6.00 | 4.23 | 26 | 858 | 0.08 | 3629 | 0.080 / 0.061 / 0.032 | Y | 12 | 12 x 15 | 72 x 96 |
| LAA-86 | Fixed Non-drainable | H | 45.0 | 6.00 | 8.00 | 4.24 | 27 | 990* | 0.10 | 4198 | 0.080 / 0.061 / 0.032 | - | 14 | 12 x 17 | 72 x 96 |
| LAA-88 | Fixed Non-drainable | H | 45.0 | 8.00 | 8.00 | 4.01 | 25 | 956 | 0.09 | 3834 | 0.080 / 0.061 / 0.032 | Y | 12 | 12 x 20 | 72 x 96 |
| LAA-129 | Fixed Non-drainable | H | 45.0 | 9.00 | 12.00 | 2.38 | 15 | 990* | 0.10 | 2356 | 0.080 / 0.061 / 0.032 | - | 21 | 12 x 24 | 72 x 96 |
| LAA-1212 | Fixed Non-drainable | H | 45.0 | 12.00 | 12.00 | 3.46 | 22 | 1089 | 0.10 | 3931 | 0.080 / 0.061 / 0.032 | Y | 14 | 12 x 30 | 72 x 96 |
| LAA-1215 | Fixed Non-drainable | H | 45.0 | 15.00 | 12.00 | 5.53 | 35 | 1173* | 0.13 | 6487 | 0.080 / 0.061 / 0.032 | - | 10 | 12 x 36 | 72 x 96 |
| LAA-12AF | Fixed Non-drainable | H | 45.0 | 12.00 | 12.00 | 3.49 | 22 | 1127 | 0.06 | 4001 | 0.080 / 0.061 / 0.032 | Y | 13 | 12 x 24 | 72 x 96 |
At Ochoa Industries, we provide custom design solutions for industrial and marine applications. Our specialties include ventilation, noise control, and explosion-proof air conditioning, focusing on performance and safety.
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