Spiro-SAFE premium silencer diameter 355 mm - length 900 mm with core (100 mm insulation)

Spiro-SAFE premium sound attenuator diameter 355 mm - length 900 mm with core (100 mm insulation)

The Spiro-SAFE premium sound attenuator diameter 355 mm - length 900 mm with core (100 mm insulation) is a cylindrical ventilation sound attenuator made from galvanized steel, specifically designed for use in ventilation and air handling ducts. This attenuator is engineered to effectively reduce noise generated by airflow and mechanical fans, keeping noise levels in living and technical spaces within acceptable limits.
The connections on both ends of the sound attenuator feature a male spigot with an integrated double EPDM lip seal, ensuring an airtight and reliable connection with round ventilation ducts.

Practical information

Sound absorption is achieved through glass wool positioned between the inner and outer shell of the attenuator. Depending on the version, the wool thickness is 50 mm for the standard model and 100 mm for the PREMIUM-100. The mineral wool is flexible and cut from roll material, allowing it to conform well to the shape of the attenuator and ensuring uniform sound attenuation along the entire length of the product. This guarantees consistent damping even with variable airflow rates and smaller duct dimensions.

The outer casing is made from high-quality galvanized steel to ensure durability and reliability, providing a robust and corrosion-resistant finish.

The construction is sturdy and functional, with a solid outer shell that withstands mechanical stresses during installation and use. The product code clearly indicates the attenuator type, insulation thickness, duct diameter (Ød1), and the length of the attenuator. This makes selecting the right attenuator for any ventilation project straightforward, from residential buildings to complex commercial applications.

Why is the premium variant better than the standard variant?

The premium sound attenuator offers several advantages over the standard version, making it better suited for certain applications:

1. Wool thickness: The premium sound attenuator uses 100 mm thick mineral wool cut from rolls. This allows the insulation to better conform to the inside shape of the attenuator, resulting in a more uniform sound attenuation.
2. Central core: From diameter 315 upwards, the premium attenuators include a central core. The core ensures that air flows through a perforated inner tube, increasing the contact of sound waves with the absorption layer. This particularly improves attenuation of mid and high frequencies.
3. More uniform sound reduction: The combination of flexible insulation, precise fittings, and thoughtful construction allows the premium variant to provide consistent sound attenuation across a wide frequency range. The standard variant’s sound reduction may be slightly less uniform, particularly at lower frequencies.