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 Arrangements, 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:
- Industrial Fans: Direct Drive or Belt Drive?
- Arrangement 1 Belt Drive Fans
- Arrangement 9 Belt Drive Fans