From the end of the line between the curves, dashed lines are drawn to the voltage on the left and the current directly below. The coefficient of performance is then calculated by dividing the heat load by the input power. If all of these parameters are within the desired specifications, the TEM is a good fit for the application. It is then time to decide the TEM options and product features needed for the system. The performance curves as well as the options and other useful information can be found on the datasheet.