The Content Of The Article:

A VMC can make noise for many reasons, the most common being due to improper installation of the device. In any case, effective solutions to these noise nuisances exist. Taking advice from a professional will solve the problem, whatever its cause.

Why is my VMC noisy?

In general, a noisy VMC is incorrectly installed. In order to prevent the risk of noise pollution from ventilation, it will be necessary to use a qualified professional to install it properly.

A properly installed ventilation system is rarely subject to this type of nuisance, except in the case of neglected maintenance. In this case, it is possible that several elements are dirty or that the engine is damaged. It is then necessary to inform the installer in order to carry out a control of the VMC device.

He will then be able to check:

  • the turbine (which must not be in contact with other elements)
  • the laying of the ducts (which can be cause of resonance)
  • fixing the box (responsible for vibrations)
  • ducts (which should not be clogged with dust)
  • air intakes (responsible for noise if they are not acoustic)
  • the adjustment itself of the ventilation (which can be noisy)

Solutions to the problem of VMC noisy

1) The noise comes from the engine of the VMC: the device is either subject to a manufacturing defect, or too old and no longer works properly. The only solution is then to have it replaced.

To note: leaving a faulty motor-fan in the state carries risks of fire.

2) Noise comes from ducts: the ducts are probably too tight. The installer will then have to modify the length of the ducts in order to make the installation more flexible.

A hissing sheath may have been crushed or punctured and again replaced.

To note: install isolated sheaths on a VMC will effectively deal with noise and condensation problems.

3) Solutions to other causes of noise:

  • The turbine is uncluttered (by a professional)
  • The box is refixeles ducts are cleaned
  • The air intakes are replaced by acoustic models
  • Ventilation is better regulated.


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