ECM (electronically commutated motor) applications are becoming more prevalent as the motor abilities increase in size and application. VFD (variable frequency drive) motors are applied most typically when varying the speed of an induction motor. The question often heard currently is “which technology is better”? This topic can expand to subjects of motor loss differences, switching frequencies, and power factor correction to name a few. This document will address the questions from a further distance as we examine a common Fanwall application and look at overall costs and efficiencies.