Climate Consultant has a fantastic tool to calculate the effectiveness of passive and active building design strategies. That means it will plot and count all hours that are within the comfort zone of the chosen model (e.g. ASHRAE 55). Then the user can click on strategies, such as "High Thermal Mass" and it will plot an extension of the area and count the hours that are within. However, not all hours are being counted (see red dots in yellow area).
I am trying to get a better understanding on how the tool is calculating these hours. I had a look at all the references that I was able to hunt down (Menu "Help" > "User Help..." > "Bibliography"), but I could only find general descriptions of the concepts, whereas I am interested in actual formulas.
Does anybody know where to find those or also similar models?