Choosing the right trumaxx Axial Fan: Top 5 things to consider

Choosing the correct axial fan for HVAC applications is crucial for ensuring efficient airflow and optimal performance. Here’s a simplified technical guide to help you through the selection process:

Airflow Requirements : Start by determining the amount of air your HVAC system needs to move, measured in cubic feet per minute (CFM) or cubic meter per hour (CMH). This calculation depends on factors like machine size, capacity, and ventilation standards.
Static Pressure : Consider the resistance to airflow in your machine, ductwork or system components, known as static pressure. The fan you choose should be able to provide sufficient airflow at the required static pressure to overcome this resistance. Choosing the right fan will depend on the exact airflow requirement at the operating pressure point for your system.
Axial Fan
Axial Airflow used to propellor Aircraft
Airflow requirement at a particular pressure point, indicated in red
Hence, we encourage our customer to ask questions! The more, the better. We believe in learning from our customers and that’s what helps us get better in the long-run.
Ask trumaxx questions like:
a. My total airflow requirement 4000 CMH at 0 Pa, can you achieve that with a 350 mm trumaxx Axial Fan?
b. My airflow requirement is 10000 CMH at 40 Pa. How many fans will I need?
Fan Size & Type : Choose the right axial fan size and type based on your system parameters such as space, volume, cooling requirement & other parameters. Axial fans come in various sizes and configurations.
One must choose the fan in the same phase as their system supply (in most cases). For example, if your system is designed for single phase (220-230V), then one must choose a single-phase fan indicated by ‘E’. Three-phase trumaxx fans are represented by ‘D’
Noise Levels : Consider the noise output of the axial fan, especially if it’s installed in a residential or noise-sensitive environment.trumaxx axial fans are designed for low noise levels & quiet operation.
Fans can cause inconvenience due to noise in residential areas
Our team had helped develop a special low-noise fan for heat pump applications since they were installed in a residential complex. The design and working of the fan were special since it operated at a lower speed at night & higher speed during the day.
Yes! trumaxx helps customize based on your needs.
Speed : Number of poles decides the speed of the fan. trumaxx Axial Fans are available in 2, 4 and 6 pole options. However, 6 pole options are more common in bigger sizes (630 mm and beyond). 2 pole options are more common in smaller sizes(up to 300 mm). Higher speed fans can provide a higher airflow but also result in more noise.
Hence, there is always a system trade-off required when one is selecting a fan for their system. The system designer must decide the priorities while selecting the right fan model.
By following these steps, you can confidently select the right trumaxx axial fan for your HVAC&R system, ensuring efficient operation and comfortable indoor environments.

Choosing the right trumaxx Axial Fan: Top 5 things to consider

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