When evaluating materials that would help with heat-island reduction, which of t

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试卷: LEED v4 GA模拟题A卷[查看]
When evaluating materials that would help with heat-island reduction, which of the following is the MOST important material attribute?
A: An SRI
B: An SR
C: A three-year aged SR value
D: Thermal emittance

参考答案: C

本题解释:
C:New in LEED v4 is the three-year aged SRI value as a performance measurement of roofing/hardscape materials. The three-year aged SR or SRI value is ’a solar reflectance or solar reflectance index rating that is measured after three years of weather exposure.’ - USGBC What this indicates is how good the product is going to be performing after three years outside. Consider a highly reflective white roof. When it’s installed, it’s clean and bright white, but the sun beats down on it day after day, it gets rained on, dust in the air collects on it, etc. After a period of time, it’s no longer as bright, and thus performs less optimally. The three-year aged rating takes this into account.