If you are reading this, it is likely you clicked a link from our email series explaining energy modeling and it's benefits. Specifically, the email "How does Energy modeling save energy?"
In this case, R-50 insulation used more energy than R-25 in a building in Denver, Colorado.
The main issue was that the R-25 building did not need heating or cooling for most hours when the outdoor air temperature was between 50 and 67 degrees. The building with the extra insulation, on the other hand, did not need heating or cooling between 50 and 58 degrees (the sweet spot was half the size when adding the extra insulation).
In this example, R-50 used MORE energy than R-25. Here's why:
The extra insulation did save...