The fan performance is typically defined by its performance curve, a plot of developed pressure over a range of fan generated air flow and the Power required with respect to its efficiency range. Understanding this relationship is essential not only for design but also for operating a fan system and is the key to optimize the fan performance.

As mentioned above, the fan performance is always related with both Developed Pressure and Generated Air Flow. Obviously, the Power for this air flow is the product of Pressure and Flow, corrected for its unit consistency. Our Energy Conservation Methodology is not to touch upon dynamic part, the fan rotor, but to correlate with the air flow and pressure matrix and attempting in modifying the fan static part geometry and especially with inlet box geometry change to achieve pressure drop reduction by optimizing the velocity at its airflow for the rated production.