Which design strategy is most directly influenced by an energy performance assessment?

• A. Only changes to the color of exterior walls influence energy performance.
• B. The energy performance assessment has no bearing on design choices.
• C. It informs envelope optimization, efficient systems, and daylighting strategies to meet targets.
• D. It is used solely for compliance documentation after construction.

Answer: (C)

An energy performance assessment is a design tool that predicts how much energy a building will use given the proposed design, climate, and usage. That prediction directly guides the decisions that shape the building’s efficiency. It informs envelope optimization—choices about insulation, airtightness, glazing type and area, and shading—to reduce heat loss or gain. It also steers the selection and sizing of efficient systems, including HVAC equipment, insulation of mechanical runs, and lighting with controls to lower energy demand. Additionally, it shapes daylighting strategies—building form, placement of openings, skylights, and daylight controls—to harness natural light and reduce reliance on artificial lighting. Because these design moves are driven by the performance targets the assessment sets, this option best reflects how the assessment directly influences design strategy. Choices about color have only minor, indirect effects, and the assessment is not merely for post-construction documentation or no bearing on design.