Basic Overview: Arrangement 4 Direct Driven Fan

What is an Arrangement 4 Fan?

Fan arrangements, based on AMCA standards, define the way a motor drives the fan, and how the motor mounts to the fan. An Arrangement 4 Fan is a direct driven fan with the fan wheel mounted to the motor shaft.

There are a number of reasons you might choose this arrangement, including:

  • Lower Maintenance
  • Tighter Footprint
  • Less Expensive Design

Components of an Arrangement 4 Fan

This is the most basic fan arrangement, where the fan wheel mounts directly on the motor shaft. There are no other drive components.

Additional items such as a damper, silencer, or vibration isolators may be available depending on the details of your application.

Other Fan Arrangements

  • Belt Driven: Arrangements 1 and 9
  • Direct Driven: Arrangement 4V
  • Belt Driven OR Direct Driven: Arrangements 3, 7, 8 and Plug

For an overview of all Fan Arrangments, visit Centrifugal Fans & Blowers and click on Arrangements

Hear it from the Application Engineer

Senior Application Engineer Chet White outlines the key differences in this 30-second video.

When you’re ready to start your project, reach out and connect with one of our application engineers to discuss the details of your specification.

Related Content: More on Fan Arrangements

To see the fans referenced above, take a look at these additional videos:

We welcome comments and questions via our LinkedIn Page, and you can always Contact Us or Request a Quote for more details.