What is the maximum number of points that a data center project can earn under indoor water use reduction credit excluding the exemplary performance?

The correct answer reflects the prescribed structure of the indoor water use reduction credit within the LEED rating system, specifically for data centers. Under this credit, projects can earn points by demonstrating a reduction in water use compared to a calculated baseline.

For standard projects seeking to achieve points under this credit, there are typically thresholds for water savings that correspond to specific point totals. In the case of data centers, which often exhibit unique water usage patterns due to their cooling systems and other operational needs, the credit framework allows for a maximum of four points. These points are awarded based on achieving significant reductions in water use, generally quantifying reductions through percentage decrease metrics.

Exemplary performance opportunities can allow projects to earn additional points beyond the standard metrics. However, the question specifies the maximum points for regular credit attainment, not including exemplary performance, affirming that while contributions to sustainability can be acknowledged further, the baseline cap for the indoor water use reduction remains at four points.