Diesel emergency generators, which are indispensable for data centers, continuously consume electricity through engine heaters to maintain a constant standby condition. This presentation will begin with an introduction of our company and an overview of our engine heater business, followed by an in-depth look at the actual standby power consumption of emergency generators throughout the year. Using a heat pump–based engine heater as a case study, we will demonstrate the energy-saving potential and operational benefits compared with conventional electric resistance heaters.