A building elongated in the east-west direction exposes the shorter east and west sides to maximum solar heat gain and high afternoon temperatures during warm months.

Design a building to take advantage of natural site energy flows by minimizing solar heat gain and allowing naturally occurring air currents to cool indoor spaces.

Shape a building so that it:

  • Is elongated in the east-west direction; and
  • Has a narrow floor plate for incorporating cross or stack ventilation.

Shade east and west walls and all glazed openings during the summer – all year in hot climates – and make the roof a light color.

In hot-humid climates, create forms that shed water and shade both exterior walls and outdoor living spaces. In hot-dry climates, admit cooler outdoor air through shaded outdoor living areas or courtyards.