Pieces formed by fitting a smaller pipe inside a larger one. The inner piece is made from perforated sheet metal and acoustic insulation material is inserted between the inner and outer walls. These sections minimise any noise transmitted along the ductwork due to fans, airflows and/or the movement of materials and particles.
Pieces formed by fitting a smaller bend inside a larger one, with concentric axes. The inner piece is made from perforated sheet metal and acoustic insulation material is inserted between the inner and outer walls. These sections minimise any noise transmitted along the ductwork due to fans, airflows and/or the movement of materials and particles.