Using the attached polar (horizontal) sunpath diagram for 48o North Latitude (Figure 1), shade
the time of the year when the sun hits the NW facade of a rectangular building with an azimuth
angle of 160o East (East of South).
[Note: The building’s azimuth angle is the angle between
true south and the direction the front façade of the building.]
add 90 to the 160, so that the NW face of the building is facing 250 degrees measured from the south counterclockwise, i.e., the NW façade faces 110 degrees west of south (110 degrees clockwise starting from the south).