Slide-in silencer - Sound absorber, around air duct SDE 8

Slide-in silencer - Sound absorber, around air duct SDE 8 – Maico – 0044.0213 – 4012799442134: Insertion silencer SDE 8 outer diameter 82mm, flexible, can be used as a silencer or for pressure regulation in flexible and spiral-seam pipes. Suitable for ventilation and ventilation. Can be flexibly adapted to the circumstances by removing the plugs. Small opening provided for air volume measurement. Little need for space. Easy to assemble. Can be installed later. Fire and mold resistant foam, in accordance with emission class M1 requirements. Easy to clean with a vacuum cleaner. Item: SDE 8, installation location: pipe, material: PU foam, weight: 0.028 kg, nominal width: 80 mm, suitable for nominal width: 80, outer diameter: 82 mm, width: 80 mm, height: 60 mm, depth: 50 mm , Insertion loss at 125 Hz: 9 dB / 4.5 dB / 4.5 dB, Insertion loss at 250 Hz: 5 dB / 3.5 dB / 2.5 dB, Insertion loss at 500 Hz: 11.5 dB / 7.5 dB / 5 dB, insertion loss at 1 kHz: 14.5 dB / 11.5 dB / 8 dB, insertion loss at 2 kHz: 18 dB / 10.5 dB / 9.5 dB, insertion loss at 4 kHz: 20 dB / 17 .5 dB / 13 dB, Insertion loss at 8 kHz: 24 dB / 21 dB / 15.5 dB, Insertion loss Note: Data for 1, 3 and 5 openings, Suitable for box fans: no, Suitable for roof fans: no, Suitable for tube fans : yes, Suitable for heat recovery systems: yes, Suitable for wall-mounted fans: no, Suitable for wall-mounted fans: no, Suitable for residential building fans: yes, Suitable for centrifugal fans: no, Suitable for circulation fans: no