What are the three paths to demonstrate energy code compliance?

The correct answer emphasizes the three recognized methods for demonstrating compliance with energy codes, specifically focusing on the prescriptive path, component path (UA), and software analysis.

The prescriptive path involves following predefined criteria established by the code, which allows builders and designers to meet requirements by adhering to specific standards regarding insulation levels, window performance, and other building elements. It provides clear requirements that must be met without needing in-depth calculations or modeling.

The component path, formally referred to as the UA path, focuses on evaluating the energy performance of individual building components, like walls or roofs, through consideration of their thermal properties. By summing the U-values (a measure of thermal transmittance) of these components, one can demonstrate that the building's overall energy performance meets or exceeds the energy code requirements.

Software analysis is another pathway that utilizes computer simulations and modeling to assess a building's energy performance against the energy code's criteria. This method allows for more complex and tailored energy efficiency strategies, accommodating different scenarios and building designs that may not fit neatly into prescriptive or single-component assessments.

Collectively, these three paths provide comprehensive and flexible avenues for ensuring that buildings meet energy code standards, making the answer concise and accurate within the context of energy compliance methodologies.