First of all, there is only one person that holds the title of “The Godfather of Energy Efficiency.” If you would like to read about him, go to my earlier post (2021) summarized and linked in the Introduction to this paper.
However, there have been many other professionals that have made critical contributions to energy efficiency, and some of these have interesting back-stories. Thus, I decided to add a few parts to the original “Godfather” post and turn this into a series.