Attenuator with recessed connection for rectangular ducts

CALMO is, due to its unique design with connection facing the side baffles, is suitable for use both in ducts and in direct connection to the air handling unit.

  • Very compact rectangular attenuator
  • Excellent aerodynamic characteristics
  • Very low pressure drop through tapered splitters
  • Environmentally friendly acoustic material, approved by independent test institute: ISOVER Cleantec® PLUS
  • Washable surface layer ISOVER Cleantec® PLUS
  • Available with inspection hatch
  • Fire protected version with 50 mm mineral wool also available
  • Connection dimensions from 400 x 300 to 2200 x 2200
  • Included in the databases Magic CAD and Point


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Article Name Type Size Date Add to bucket
Page < 1 >
Acoustics  Overview Brochures 2.60MB 9/18/2019 Add to bucket
CALMO  Attenuator with recessed connection for rectangular ducts Catalogue/Product sheets 463.13kB 11/8/2017 Add to bucket
CALMO  Building product declaration Declarations 179.00kB 1/10/2009 Add to bucket
ISOVER Cleantec PLUS  Approval 2706/92, Duct insulation Declarations 3.06MB 11/13/2017 Add to bucket
MORENDO, CALMO, CADENZA, LARGO, LENTO  Installation, commissioning, maintenance Instructions/Manuals 99.64kB 11/8/2017 Add to bucket