Which statement best describes building orientation's influence on energy demand?

• A. Determines solar gains and shading, impacting heating/cooling needs.
• B. Only affects aesthetics.
• C. Has no impact on energy performance.
• D. Only affects acoustics.

Answer: (A)

How a building is oriented directly affects energy demand by shaping solar heat gains and shading. When a structure faces favorable directions, it can capture winter sun through windows, reducing the need for heating. At the same time, proper shading or overhangs on sun-facing facades—especially south-facing in many climates—limits summer solar gain, lowering cooling needs. East and west facades often get strong sun in the morning and afternoon, so designing effective shading for these sides helps control peak cooling loads. Orientation isn’t about looks or acoustics; it’s about how heat and light move into and around the building and how that influences the size and operation of the heating and cooling systems. The statement that orientation affects solar gains and shading, thereby impacting heating and cooling needs, best describes this relationship.