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The long facades of a building in the northern hemisphere are best oriented

  • A.along the prevailing wind direction
  • B.toward the nearest road for access
  • C.north and south, so the east and west walls are short
  • D.east and west, so the north and south walls are short

Answer: C

Correct answer: north and south, so the east and west walls are short

South glazing receives a high sun that an overhang can shade in summer and admit in winter, and north glazing gets diffuse light with almost no gain. East and west receive a low sun that is very hard to shade, so those elevations are made as short as possible. Orientation is the cheapest of all energy measures, since it costs nothing at design stage.

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