Certified Energy Auditor Practice Exam 2025 – All-in-One Resource to Achieve Exam Success!

The correct answer emphasizes the significant role that building orientation plays in the effectiveness of passive solar design, which is attributed to 80% of its overall effectiveness. Proper orientation of a building maximizes solar gain in winter while minimizing it in summer, directly influencing energy efficiency.

When a building is oriented correctly toward the sun, it can enhance natural heating, reduce the need for artificial lighting, and improve overall comfort by making the most of natural light and warmth throughout the day. The orientation determines how much sunlight enters the building and when, impacting temperature regulation and energy consumption.

In this context, understanding the importance of orientation helps energy auditors and builders design structures that optimize solar energy use, contributing to sustainability and reduced energy costs. The high percentage indicates that while other factors such as window design, thermal mass, and shading are also important, the orientation remains the most critical element in achieving effective passive solar energy performance.