Obstructions to sunlight
Obstructions can have a significant effect
on solar potential. For low- to mid-rise
buildings, obstructions are usually
buildings, terrain or trees. For larger
buildings, obstructions are usually other
large buildings.
Obstructions can be identified on the sun
path chart in figure 8. East and west
obstructions can reduce solar gain in the
summer and admit energy in the winter,
when the sun rises in the southeast and sets
in the southwest.