SORDO-B, -C (with 100 mm thick rock wool)

The SORDO-B, -C are isolated to comply with Fire- resistance Classes EI30/E60, EI60/EI20 and EI120 on condition that the tabulated safety distance to flammable material and/or persons in an escape route is complied with.

In the cases in which the safety distance to flammable material and/or persons in an escape route is not complied with, the SORDO-B, -C corresponds to Fire- resistance Class EI60/E120.

SORDO-P, -PF (with 100 mm thick mineral wool with aerodynamic centre body)

SORDO-P corresponds to Fire resistance Class E60

  • Mineral wool covered with special polyester woven fabric
  • 100 mm shorter
  • Tightness Class D (<400 mm dimension)
  • Excellent sound attenuation
  • Included in the MagiCAD database
  • Fire-resistance Classes EI30 and EI120
  • *See table for requisite safety distance


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A circular sound attenuator with circular connection spigots.

Unique properties regarding fire-resistance class, fibre- migration proof design and sound attenuation.

Patented self-supporting fibre-migration proof surface lining and end wall solution.


Producers in every line of trade are constantly in pursuit of ways to downsize their products yet retain the same performance. This is also the case in the indoor climate system field. The smaller the products we at Swegon are able to fabricate; the more installation options the sub- contractor will have at his disposal. Reduced sizes also make the products easier to handle and install.

It was with these prerequisites in mind that we began to develop the new SORDO, our popular round sound attenuator with circular connection spigots.

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