CALM S18-150
Product Information
The Colt CALM S18-150 is a high-performance acoustic louvre designed to balance noise reduction with maximum ventilation. Its 150 mm straight blade profile provides the highest airflow in the CALM range and achieves Rw (C, Ctr) 16 (-1, -3) when tested to BS EN ISO 10140-2:2021. Combining robust acoustic performance with aerodynamic efficiency (Cv 0.200), its modular steel design ensures flexibility, safe installation, and long service life.
Product Highlights
- 150mm thick straight blade profile delivering maximum ventilation within the CALM range
- Tested to BS EN ISO 10140-2:2021 for certified acoustic attenuation
- Modular system allows for walls or runs of virtually any width or height
- Easy two-person installation with pre-punched fixing points
- Panel joining kits enable longer spans with reduced need for intermediate supports
- Compatible with COLT Universal Louvre (UL) systems for integrated weather protection and visual consistency
- Available with optional bird guard, insect mesh or fly screens to suit application needs
Technical Information
Acoustic Performance
| Octave Band Frequency (Hz) | Sound Reduction Index (dB) |
| 125 | 5.9 |
| 250 | 8.4 |
| 500 | 10.7 |
| 1000 | 17.8 |
| 2000 | 18.5 |
| 4000 | 16.9 |
Contact our dedicated acoustic louvre team by email at louvre@uk.coltgroup.com for specific calculations based on your project requirements
Aerodynamic Performance
| Face Velocity (m/s) | Pressure Drop (Pa) |
| 0.0 | 0 |
| 0.5 | 4 |
| 1.0 | 15 |
| 1.5 | 34 |
| 2.0 | 60 |
| 2.5 | 94 |
| 3.0 | 135 |
| 3.5 | 184 |
Contact our dedicated acoustic louvre team by email at louvre@uk.coltgroup.com for specific calculations based on your project requirements
Contact Us
For more information about the Calm S18-150, or to find out how Colt can help with your project, get in touch with our team today.