The solution to reduce the level of unwanted sounds from the mechanical system.
- high level of noise reduction
- perforated inner layer of the duct
- polyester barrier preventing the glass fibres from getting to the air flow
- fireproof aluminium layer of 7 microns
- insulating material - mineral wool of 25 mm thickness
- multi-layered outer shell (polyester film of 12 microns)
- packed in 10-meter sections