Sound protection

to protect people and the environment

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Sound protection

experts since 1928

To protect the health of your staff, local residents and the environment, and to comply with legal requirements, your ventilation systems must not exceed the prescribed sound levels for operating noise.
If the necessary operating data produce excessive sound power, additional measures must be taken to reduce the sound transmission. To this end, HLU offers both standardised components and customer-specific bespoke solutions, calculated and manufactured based on setpoint values.
sound-enclosures-made-of-plastic

Sound enclosures made of plastic

Application
  • reduces the fan’s sound radiation
Features
  • sound level reduction approx. 10 dB at 250 Hz
  • available for fans of all types and series
sound-enclosures-made-of-steel

Sound enclosures made of steel

Application
  • reduces the fan’s sound radiation
Features
  • sound level reduction approx. 10 dB at 250 Hz
  • available for fans of all types and series
duct-silencer

Duct silencer

RSD

Application
  • for noise reduction in ventilation systems with small to medium flow rates
Features
  • volume flow from 20 to 8000 m³/h
  • available in 14 nominal diameters from 75 to 400 mm intake diameter
splitter-sound-attenuator

Splitter sound attenuator

Application
  • for noise reduction in ventilation systems with small to large flow rates
Features
  • dimensions are calculated individually based on the volume flow and desired sound reduction

Sound protection specifically for roof fans

silencer-for-roof-fans

Silencer for roof fans

Application
  • for sound attenuation in direct combination with HF roof fans: HF D …15 /17 D and HF D …-16 D
Features
  • available in 7 nominal diameters from 110 to 400 mm intake diameter
  • larger nominal diameters possible on request