855773644-LEED-v5-BD-C-Reference-Guide-Launch-Edition - Page 393

Extracted Content

These GWP benchmarks are primarily derived from GWP limits in the EPA 2023 AIM Act Technology Transitions Rule, which are like those in the EU F-Gas Regulations and other regulations following the Montreal Protocol and Kigali Agreement.

Calculations

Use equipment data and the project’s total weighted average GWP reported in the refrigerant inventory completed for EAp5: Fundamental Refrigerant Management .

For each refrigerant-using equipment, determine the GWP benchmark using the equipment’s refrigerant charge reported in the refrigerant inventory, and the Table 1 GWP benchmark for the equipment:

Equation 1. GWP benchmark for each piece of equipment

𝐺𝑊𝑃𝐸𝑞𝑢𝑖𝑝𝑚𝑒𝑛𝑡_𝐵𝑒𝑛𝑐ℎ𝑚𝑎𝑟𝑘 = 𝑅𝐶𝐸𝑞𝑢𝑖𝑝𝑚𝑒𝑛𝑡 × 𝐺𝑊𝑃𝐵𝑒𝑛𝑐ℎ𝑚𝑎𝑟𝑘

Calculate the total benchmark GWP by summing the GWP benchmark for each piece of equipment.

Equation 2. Total GWP benchmark

𝐺𝑊𝑃𝑇𝑜𝑡𝑎𝑙_𝐵𝑒𝑛𝑐ℎ𝑚𝑎𝑟𝑘 = 𝛴 𝐺𝑊𝑃𝐸𝑞𝑢𝑖𝑝𝑚𝑒𝑛𝑡_𝐵𝑒𝑛𝑐ℎ𝑚𝑎𝑟𝑘

Calculate the weighted average GWP benchmark by dividing the total GWP benchmark by the sum of refrigerant charge for all equipment.

Equation 3. Weighted average GWPBenchmark calculation

𝐺𝑊𝑃𝑇𝑜𝑡𝑎𝑙_𝐵𝑒𝑛𝑐ℎ𝑚𝑎𝑟𝑘 𝑊𝑒𝑖𝑔ℎ𝑡𝑒𝑑 a𝑣𝑒𝑟𝑎𝑔𝑒 𝐺𝑊𝑃 𝐵𝑒𝑛𝑐ℎ𝑚𝑎𝑟𝑘 = 𝛴𝑅𝑐 𝑓𝑜𝑟 𝑎𝑙𝑙 𝑒𝑞𝑢𝑖𝑝𝑚𝑒𝑛𝑡

Total weighted average GWP for the project cannot exceed 80% of the weighted average GWP benchmark for 1 point; and cannot exceed 50% of weighted average GWP to achieve both points.

Equation 4. Percentage (%) threshold calculations

𝑊𝑒𝑖𝑔ℎ𝑡𝑒𝑑 a𝑣𝑒𝑟𝑎𝑔𝑒 𝐺𝑊𝑃 % 𝑜𝑓 𝑏𝑒𝑛𝑐ℎ𝑚𝑎𝑟𝑘= 𝑊𝑒𝑖𝑔ℎ𝑡𝑒𝑑 a𝑣𝑒𝑟𝑎𝑔𝑒 𝐺𝑊𝑃𝐵𝑒𝑛𝑐ℎ𝑚𝑎𝑟𝑘

U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, April 2025 Launch Edition 383