Round sound absorber used to suppress noise in ventilation and air conditioning duct installations.

properties

• Spiro rolled pipe
• damping layer made of mineral wool
• fiberglass fabric - protection against mineral wool getting into the installation
• galvanized steel sheet with perforation
• front edges finished with rimless casings - the element can be connected with Spiro cables
• muffler in cartridges made of sound-absorbing material
• standard damper lengths L = 500, 1000, 1250, 1500 mm
• connector length E: at least 45 mm for diameter 100-250 mm; at least 55 for a diameter of 315-400 mm

Possibility of making a muffler in other dimensions.