In 2003, as part of their presentation (“Ventilation Myths and Misconceptions”) at the Affordable Comfort conference, Collin Olson and Paul Francisco debuted a software tool they developed called SEE STACK. (If you want to experiment with the software, you can safely click here to download the virus-free executable file and training manual from The Energy Conservatory).

Given the intense interest in the architectural community on health and wellness inside buildings, and in the related WELL building standard, you’ve probably heard someone tell you recently that we spend 90% of our time indoors. Usually this is followed by some assertion that we need to make our products, materials, and interior spaces healthier. (Is anyone reminding us to get outside a little more often?)

I’ve been hearing this statistic so much that I started to wonder if it was an urban legend. It’s not!