OpenStudio. I want to show you 1- the left pic is the energy simulation of all south-west thermal zones of my building without anything (no hvac, no ventilation, no infilitration) just the building with loads, people, schedules ect. And then the right pic 2) the building using the "WindandStackOpenArea" measure, setting the minimum indoor T = 22 C, and the maximum indoor T = 26 C. I would have expected that this measure works only during the summer, but in my case temperatures go higher than 26C (the limit I set). Anyway it seems that it works (I don't know why) also during the winter, why? Have a look at the image: in the left case WindandStackOpenArea is not set, and the temperatures in January-February are in the range 20-25 C, but in the right case temperatures in Jan-Feb are LOWER than 22C. Why? I set the minimun indoor T should be 22C, not the maximum. I don't see why WindandStackOpenArea seems that has worked also in these cold months. Then, during the summer it seems that WindandStackOpenArea has no more effect because of the high temperatures, and I can understand it.