Choosing the Quiet Performer for Your HVAC: Cross Flow vs. Centrifugal Fans

Noise pollution in hospitals, offices, or luxury hotels isn’t just annoying – it violates ISO 3744 standards and impacts well-being. The culprit? Often poorly selected fans.

Battle of the Blowers:

Cross Flow Fans:

Advantages: Flat structure, suitable for space limited places (such as air conditioning indoor unit, wind curtain); can produce wide and uniform airflow; can achieve low noise under specific design (especially in medium and low air volume).

Noise considerations: The noise spectrum is usually wide, and there may be a "howling" sound at specific frequencies when the design is not good. BLAUBERG emphasizes that the noise is reduced through blade optimization and balancing technology.

BLAUBERG’s solution: Curved blade design + vibration-damping mounts cuts noise by 15%

Centrifugal Fans:

Advantages: Higher pressure capacity, suitable for systems with ductwork or high resistance; usually achieves more concentrated airflow and better acoustic characteristics (especially at higher wind pressure/airflow), and the noise spectrum is easier to control.

Noise considerations: Backward centrifugal impellers are generally quieter and more efficient than forward ones. Emphasis is placed on the aerodynamic optimization and low vibration design of the BLAUBERG centrifugal fan.

BLAUBERG’s solution: Backward-curved impellers reduce turbulence noise

How to choose a silent fan?

Define application requirements (air volume, static pressure, space constraints).

Focus on product dB (A) sound power level/sound pressure level test data

Consider the installation of fans in the system and noise reduction measures.

BLAUBER's fans can perfectly meet these requirements: Focus on the aerodynamic acoustic optimization of fans, providing a variety of low noise design of axial flow and centrifugal fans to meet strict noise standards.

Welcome to contact the engineer team for more information!