Hello everybody, I would like your comments on my findings and perhaps prompt me to look at relevant literature. Consider an enclosed airspace 1m length, 1m height, 0.5m width. At the center of its one 0.5 side a fan is drawing air out of the chamber through an aperture(steady, low air extraction) . At its other end a heater is used to produce different thermal conditions (through another aperture). I have placed 3 thermocouples at the fan's side, 1 at the center of the aperture and 2 at the lower corners. For a full heat input, the temperature elevation at the second hour is 4.5 C for the right corner and 1.7C for the left corner. This must mean that the left corner is better ventilated than the right corner, but, if that is the case, why does the elevation at the fan aperture is 8.1C, since it is definitely a point in space always under ventilation??