LEED AP with Operations and Maintenance (O+M ) Practice Exam

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What is the existing buildings water use baseline for buildings with a certificate of occupancy dated 2000 regarding Indoor Water Use Reduction?

100%
120%
80%
150%

The correct answer is: 120%

The existing buildings water use baseline for buildings with a certificate of occupancy dated 2000 is established at 100%. This baseline is critical for determining the reduction in indoor water use, which is necessary for earning credits in the Indoor Water Use Reduction category under the LEED for Existing Buildings: Operations and Maintenance rating system. To clarify the concept of a baseline: it serves as a reference point against which water usage reductions are measured. In this context, for buildings that have been occupied since the year 2000, the standard is set at 100% of their water use before any reduction measures are implemented. The goal of the Indoor Water Use Reduction credit is to minimize water consumption by implementing water-efficient fixtures and fittings. By knowing the baseline, project teams can accurately calculate the percentage reduction achieved and determine if they meet the requirements for certification. In summary, the correct response reflects that the baseline for assessing reductions in indoor water use is initially set at 100%, against which water-efficient strategies are compared to identify the overall savings achieved by the building operations.