CALM S18-300
Product Information
The Colt CALM S18‑300 is a high‑performance acoustic louvre designed for environments needing both ventilation and noise control. Its 300 mm straight blade profile provides enhanced sound reduction, achieving Rw (C, Ctr) 22 (‑1, ‑5) as tested to BS EN ISO 10140‑2:2021, while maintaining excellent aerodynamic efficiency (Cv 0.161). With a modular design, robust steel construction, and optional finishes, it ensures flexibility, durability, and long service life.
Product Highlights
- 300 mm straight blade profile balances strong noise control with airflow
- 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 | 7.3 |
| 250 | 10.7 |
| 500 | 17.5 |
| 1000 | 29.0 |
| 2000 | 30.2 |
| 4000 | 24.4 |
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 | 6 |
| 1.0 | 23 |
| 1.5 | 52 |
| 2.0 | 93 |
| 2.5 | 145 |
| 3.0 | 208 |
| 3.5 | 284 |
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 S18-300, or to find out how Colt can help with your project, get in touch with our team today.