CALM S18-600-V
Product Information
The Colt CALM S18‑600V is the highest performing acoustic louvre in the range, designed for maximum noise attenuation with airflow. Its 600 mm chevron blade profile, formed by combining two S18‑300 units, achieves Rw (C, Ctr) 31 (‑2, ‑8) when tested to BS EN ISO 10140‑2:2021, while maintaining aerodynamic efficiency (Cv 0.142). With a solid metal appearance front and rear, modular construction, robust galvanised steel, and finish options, it ensures flexibility, durability, and long service life
Product Highlights
- 600 mm chevron blade profile delivers maximum acoustic attenuation
- Certified acoustic performance tested to BS EN ISO 10140‑2:2021
- Modular design enables walls or runs in any required width or height
- Pre‑punched fixing points allow safe, quick two‑person installation
- Panel joining kits support longer spans with fewer structural supports
- Integrates seamlessly with Colt UL systems; optional rear‑mounted screens
Technical Information
Acoustic Performance
| Octave Band Frequency (Hz) | Sound Reduction Index (dB) |
| 125 | 11.1 |
| 250 | 17.2 |
| 500 | 30.6 |
| 1000 | 49.5 |
| 2000 | 52.3 |
| 4000 | 42.4 |
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 | 7 |
| 1.0 | 30 |
| 1.5 | 67 |
| 2.0 | 119 |
| 2.5 | 186 |
| 3.0 | 268 |
| 3.5 | 365 |
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 S18-600-V, or to find out how Colt can help with your project, get in touch with our team today.