Acoustical louvers are designed to reduce noise transmission while protecting air intake and exhaust openings. These non-drainable models feature airfoil blades filled with 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 | Description | Orientation H – Horz, V – Vert |
Angle Deg. | Spacing Inches | Depth Inches | Sq. Ft. | % | Water Penetration Rating (WPR) Feet/minute |
Pressure Drop @ WPR inches W.C. |
Air Flow SCFM | Material Thickness (Frame/Blade/Perf) Inches |
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 | 6.43 | 26 | 898* | 0.08 | 3649 | 0.080 / 0.063 / 0.092 | Y | 12 | 12 x 12 | 72 x 96 |
| LAA-86 | Fixed Non-drainable | H | 45.0 | 6.00 | 8.00 | 6.76 | 27 | 950* | 0.10 | 4498 | 0.080 / 0.063 / 0.092 | Y | 14 | 12 x 12 | 72 x 96 |
| LAA-88 | Fixed Non-drainable | H | 45.0 | 8.00 | 8.00 | 7.08 | 28 | 926 | 0.09 | 3834 | 0.080 / 0.063 / 0.092 | Y | 13 | 12 x 12 | 72 x 96 |
| LAA-129 | Fixed Non-drainable | H | 45.0 | 10.00 | 8.00 | 7.94 | 31 | 930* | 0.13 | 3955 | 0.080 / 0.063 / 0.092 | – | 14 | 12 x 12 | 72 x 96 |
| LAA-1212 | Fixed Non-drainable | H | 45.0 | 12.00 | 12.00 | 6.32 | 25 | 1089 | 0.16 | 3695 | 0.080 / 0.063 / 0.092 | – | 13 | 12 x 12 | 72 x 96 |
| LAA-1215 | Fixed Non-drainable | H | 45.0 | 15.00 | 12.00 | 5.93 | 35 | 1173* | 0.13 | 6487 | 0.080 / 0.063 / 0.092 | – | 10 | 12 x 36 | 72 x 96 |
| LAA-12AF | Fixed Non-drainable | H | 45.0 | 12.00 | 12.00 | 4.63 | 22 | 1127 | 0.06 | 4001 | 0.080 / 0.063 / 0.092 | – | 10 | 12 x 14 | 72 x 96 |
Notes:
AMCA certified performance based on 4” x 4” louver
Standard construction designed for 25 PSF (100 mph) wind load for maximum single panel size
*Pressure drop velocity only
| Sound Attenuation Ratings | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Model | Octave Band | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 63 | 125 | 250 | 500 | 1000 | 2000 | 4000 | 8000 | ||
| LAA-66 | Transmission Loss (dB) | 1 | 6 | 5 | 9 | 13 | 15 | 14 | 14 |
| Free Field Noise Reduction (dB) | 7 | 12 | 15 | 19 | 21 | 21 | 21 | 20 | |
| LAA-86 | Transmission Loss (dB) | 1 | 4 | 4 | 8 | 13 | 14 | 13 | 13 |
| Free Field Noise Reduction (dB) | 7 | 10 | 13 | 18 | 22 | 25 | 25 | 23 | |
| LAA-88 | Transmission Loss (dB) | 1 | 5 | 6 | 9 | 13 | 16 | 13 | 11 |
| Free Field Noise Reduction (dB) | 7 | 11 | 14 | 18 | 22 | 25 | 22 | 20 | |
| LAA-129 | Transmission Loss (dB) | 2 | 8 | 11 | 13 | 22 | 28 | 25 | 17 |
| Free Field Noise Reduction (dB) | 8 | 14 | 18 | 22 | 29 | 34 | 31 | 23 | |
| LAA-1212 | Transmission Loss (dB) | 9 | 7 | 11 | 14 | 21 | 25 | 21 | 17 |
| Free Field Noise Reduction (dB) | 15 | 13 | 19 | 25 | 29 | 30 | 27 | 22 | |
| LAA-1215 | Transmission Loss (dB) | 2 | 6 | 10 | 12 | 20 | 26 | 24 | 19 |
| Free Field Noise Reduction (dB) | 8 | 12 | 17 | 23 | 28 | 33 | 31 | 26 | |
| LAA-12AF | Transmission Loss (dB) | 7 | 6 | 7 | 13 | 19 | 17 | 16 | 14 |
| Free Field Noise Reduction (dB) | 14 | 12 | 14 | 19 | 21 | 19 | 16 | 15 | |
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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