Determining the performance of a fan to be used in an engineering application is an important process, especially when manufacturing or designing a complex system. The fan in this performance test was a centrifugal fan housed in Dougherty M-16 on the Engineering Campus at the University of Tennessee. Using the Air Moving and Conditioning Association's Test Code 210-67, the fan's performance was determined, and curves were generated for both forward and backward facing impellers. The fan tested was first fitted with a forward facing impeller, and set to its highest speed. The air flow was unrestricted first, then limited to 80%, 60%, 40%, and 20% of the original flow rate, successively. At each point, data was recorded, including the horsepower, airflow, and pressure along the length of the test apparatus. This process was repeated using the forward facing impeller at 75% of its maximum speed, the backward facing impeller at full speed, and the backward facing impeller at 75% speed. Data was taken like before, and the ambient temperature and pressure were recorded. Using the pressure data along the test apparatus, average static and total pressures were calculated by the computer program, FAN.BAS. This program also computed the flow rate, horsepower, and efficiency at each data collection point. Finally, these data points were used to generate performance curves for each impeller at each speed (100% and 75%). Comparing these performance curves yielded interesting results. The curves followed roughly the same shape as expected based on their type (forward or backward facing impellers), with the exception of the 75% flow reading on the forward curved impeller