Crossflow fans have the following advantages over axial and centrifugal fans:

1. Smaller size: Crossflow fans are usually more compact and smaller in size than axial and centrifugal fans. This makes crossflow fans more suitable for applications with limited space and can be easily installed in systems with smaller equipment.

2. Uniform airflow distribution: The airflow generated by crossflow fans flows along a horizontal direction, and the airflow is evenly distributed throughout the channel. In contrast, axial and centrifugal fans may have strong airflow in the center, but weak airflow at the edges. The uniform airflow distribution of crossflow fans makes them more ideal in some applications, such as electronic equipment cooling and air conditioning systems.

3. Lower noise level: Due to the uniform airflow distribution of crossflow fans, they usually produce lower noise levels compared to axial and centrifugal fans. This makes crossflow fans suitable for applications that require a low noise environment, such as offices, medical equipment, etc.

4. Multi-directional airflow output: Crossflow fans are more advantageous in some specific applications, such as curtain wall ventilation, drying equipment, etc.

5. Simple structure and small moving parts: Crossflow fans usually have a relatively simple structure with fewer moving parts. This helps reduce failures and maintenance costs and improves reliability.

It should be noted that crossflow fans also have some limitations, such as lower pressure generation capabilities and relatively small air volumes. Therefore, when choosing a fan type, it is necessary to consider the specific application needs and performance requirements.