LEED AP Building Design and Construction (BD+C) Practice Exam

Shade and architectural devices used for heat island reduction must have at least what three-year aged solar reflectance?

1. 0.25

2. 0.28

3. 0.30

4. 0.33

The correct answer is: 0.28

In the context of LEED certification, particularly with regard to heat island reduction strategies, the use of shading and architectural devices is crucial for minimizing the impact of urban heat islands. The solar reflectance of these materials is a key factor in their effectiveness at reducing heat absorption from solar radiation. The specific requirement established by the LEED (Leadership in Energy and Environmental Design) standards is that such shade and architectural devices must have a three-year aged solar reflectance of at least 0.28. This means that over a period of three years, the material should maintain a reflectance value of 28% or higher, which supports the performance metrics necessary for effective heat island reduction. Choosing materials with appropriate solar reflectance values helps to mitigate heat buildup in urban areas, which can lead to significantly lower surrounding temperatures and reduced energy demand for cooling. This aligns with broader sustainability goals and contributes to the overall energy efficiency of the building. The importance of these specifications lies in their capacity to influence both the immediate microclimate around a building and the larger urban environment, promoting better thermal comfort and reducing the energy load related to air conditioning and cooling needs.