How to reduce noise from ventilation systems?

Why does ventilation systems make noise?

Ventilation noise can negatively affect comfort in an apartment or office. It occurs for several reasons:

• Incorrect installation of the ventilation system

• Insufficient sound insulation of air ducts

• High level of fan vibration

• Powerful air flow in ventilation shafts

Depending on the source, noise can be mechanical, aerodynamic or structural.

What types of noise are there?

To effectively reduce noise in residential premises, it is important to use fans with a low noise level (up to 25-30 dB) and to properly design ventilation systems using sound insulation inserts in ventilation ducts and air ducts.

In order to To eliminate noise and vibration of air flows, special installations and fans with speed control should be installed, as well as flexible ducts should be used to minimize sound in ventilation duct systems with a diameter of mm.

• Mechanical noise — occurs due to the operation of the fan motor, wear of parts or insufficient sound insulation of the device housing.

• Aerodynamic noise — caused by the speed of air flow through the ducts. The narrower the cross-section of the ducts, the higher the noise level.

• Structural noise — transmitted through the building structure if the ventilation system does not have vibration-isolating inserts.

How to reduce the noise level of ventilation systems?

• Choosing quiet equipment
  Choose fans with a low noise level (up to 25-30 dB). Flexible ducts should be used to reduce duct vibration.

• Proper installation and insulation
  Fans should be mounted on vibration-absorbing mounts to eliminate vibration of the ventilation system. Use soundproofing materials for air ducts.

• Using silencers
  Silencers effectively reduce noise levels in ventilation systems by absorbing aerodynamic fluctuations in the air flow.

• Ventilation system inspection
  Air ducts should be checked for blockages that can increase noise. If necessary, install exhaust fans with improved noise insulation.

• Ventilation system design
  When designing, it is important to take into account the speed of air movement: use larger diameter air ducts to reduce noise from the flow.

Recommendations for apartments, houses and offices

• Apartments — install low-noise exhaust fans, especially in bathrooms and kitchens.

• Houses — use ventilation systems with soundproofed ducts.

• Offices — additionally install soundproofing screens on ventilation shafts.

To reduce the noise level in ventilation systems, you should choose a fan with optimal characteristics for your air duct, because vibration and irregular air flow can significantly increase noise.

Conclusion

To reduce ventilation noise and improve air quality, you need to properly install ventilation systems, select low-noise equipment, and apply noise and vibration insulation. If you need to find a solution for your home or office — the Ventilator.ua team is always ready to help!