What shows the relationship between the loads on a fan and its output in terms of volume delivered per unit time?

The fan characteristic curve is a crucial tool that illustrates the relationship between the fan's performance and the load it experiences. This curve effectively presents how the volume of air delivered by the fan changes in response to varying static pressures or loads. Specifically, the curve plots the airflow rate against the pressure drop, enabling engineers and operators to visualize how much air a fan can move at different resistance levels within a ventilation system.

Understanding this curve is vital for selecting the appropriate fan for a specific application, ensuring the system operates efficiently under expected load conditions. By examining the fan characteristic curve, one can determine optimal operating points and troubleshoot potential issues related to airflow and pressure.

Other options may be relevant in different contexts but do not specifically encapsulate the description requested. For example, while the fan load curve also illustrates loads, it does not focus exclusively on the relationship between loads and volume output. The fan performance chart generally provides a broader array of performance metrics but does not specifically zero in on the load-output relationship the characteristic curve emphasizes. Similarly, the fan output graph might illustrate basic output data, but its utility is less focused compared to the detailed insights provided by the characteristic curve.