Ultra Quiet Fan
OVERVIEW The Ultra Quiet fan, offered by SPX Cooling Technologies, Inc., is designed for HVAC cooling tower applications where very low sound is a necessity.


The wide chord blade design is well suited for low sound operation, delivering superior air flow and pressure capability at reduced speed.

• The unique aerodynamic design optimizes the performance characteristics of the blade to offer significantly lower sound levels compared to low or quiet models.

• Up to 12 dBA reduction in 5’-above-the-fan sound levels vs. standard low sound fans.

• The aluminum construction of the Ultra Quiet fan is ideal for aftermarket retrofits, particularly in tight urban environments where cranes and other equipment cannot be used.

• Constructed from aluminum, the Ultra Quiet fan meets FM approval standards.

• The Ultra Quiet fan is designed for continuous duty in all cooling tower operating conditions. It utilizes marine grade quality 5052 aluminum alloy blades that are well suited for harsh cooling tower environments.

• Each blade is secured to the hub with a resilient mount attachment. By loosening the attachment hardware, blades are easily rotated to achieve desired pitch, delivering precise utilization of fan horsepower.


Genuine Marley OEM parts are precision-engineered to provide you with a reliable product. While other suppliers may offer parts at an initial savings, you risk lowering performance — and losing FM and CTI ratings. Marley OEM parts provide the durability you can trust because we design and manufacture them exclusively for cooling towers.

With plant operation relying on your cooling tower performance, it’s important to select the parts that are among the highest quality available — Marley OEM parts.

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Marley Ultra Quiet Fan Blade Pitch Adjustment
  • Designed to maximize cooling efficiency while minimizing sound levels

  • Up to 70% lighter than similar FRP fans

  • Reduced vibration potential

  • Easier handling and installation

  • Excellent for knockdown towers or urban retrofits

  • Durable marine grade aluminum blades resiliently mounted to machined aluminum hub

  • Fast, easy and precise pitch adjustment

  • Available in 66” to 156” diameters


Marley Cooling Tower Parts