The problem: vibrations and lack of space
Rigid ducts are great for airflow, but they are also great at transmitting sound. Every vibration from the fan travels through the metal pipe straight into your rooms. Additionally, when installing ventilation in low ceiling voids, there is often not enough space to align rigid elbows perfectly.
Installation errors turn into noise. Trying to force-fit slightly misaligned rigid ducts creates tension, which later turns into resonating sound. Flexibility here is not just a convenience, but a necessity.
The solution: a flexible acoustic barrier
A flexible silencer acts as the system's shock absorber. It physically separates the ventilation unit from the ductwork, preventing vibrations from traveling further. The mineral wool filling effectively absorbs aerodynamic noise, while the flexible construction allows you to easily bypass beams or other obstacles.
This is a renovator's best friend. When you need to connect a new heat recovery unit to old ducts or when a diffuser location shifts slightly, a flexible silencer solves the problem without complex rework.
Double benefit: a flexible silencer not only dampens sound but also compensates for installation inaccuracies, acting as a vibration-absorbing connector.