My start in the industry happened to coincide with the early days of the R-2000 Housing program. That program was the result of millions of dollars of Canadian research that demonstrated how to optimize energy performance in cold weather housing. The research, and the R-2000 program that came out of it in 1982, drove the early development of HRVs, insulated sheathing and window glazing options. I recall the passion and enthusiasm of the builders, energy professionals and manufacturers who participated in those early days. I am intrigued to see a similar passion and enthusiasm exhibited by proponents of the Passive House program that has been introduced to North America over the last decade or so.