the wind is mostly from the north-northeast (NNE) and the north (N). The wind starts to change direction in January to the south-southwest (SSW) and the south (S). The wind direction changes completely into SSW and S in February. The wind speed in the winter months varies from
0.4 to 3.2 m/s. The five groups of climate conditions shown in Fig. 3 are plotted on a timetable in Fig. 4. Each climate condition is plotted with the corresponding prevailing wind speed. Since group 2 needs maximum ventilation, it is important to have sufficient wind velocities for this group. Fig. 4 indicates that the lowest wind speed for group 2 occurs in the evenings of January and February. The corresponding average wind speed is 1.4 m/s from the SSW direction. Hf a house can provide enough wind under this condition, it can be comfortable for all other conditions except group 1.