The pressure produced by an axial fan is influenced by several key technical parameters:

1. Airflow Rate: Measured in cubic meters per hour (m³/h) or cubic feet per minute (CFM), the airflow rate impacts the pressure. Generally, as airflow increases, pressure decreases, assuming other factors are constant, because the fan must work harder to move a larger volume of air.
2. Fan Speed: The rotational speed of the fan directly affects the pressure. Higher speeds increase pressure by moving air more rapidly, but this must be balanced with considerations of energy efficiency and fan durability.
3. Fan Diameter: The diameter of the fan influences the blade’s surface area interacting with the air. Larger diameter fans can generate higher pressures due to their ability to move more air, though blade design is also crucial.
4. Blade Design: The shape, angle, and number of blades affect performance. Well-designed blades can enhance pressure generation and air movement efficiency.
5. Air Resistance: Resistance from ductwork, filters, and obstructions affects pressure. Greater resistance requires the fan to generate higher pressure to maintain the desired airflow.
6. Air Density: The density of the air impacts pressure. In denser air (e.g., at lower altitudes), the fan can achieve higher pressures compared to less dense air.
7. Motor Efficiency: The motor’s efficiency affects how well the fan performs. A more efficient motor supports better pressure generation and consumes less energy.

These factors interact to determine the overall performance and pressure of an axial fan. When designing or selecting a fan, all these parameters should be considered to achieve optimal performance.