855773520-LEED-v5-ID-C-Reference-Guide-Launch-Edition-1 - Page 239
Extracted Content
These GWP benchmarks are primarily derived from GWP limits in the EPA 2023 AIM Act Technology Transitions Rule, which are similar to those in the European Union F-Gas Regulations [57] , 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
𝐸 𝐸 𝐸 𝐸 𝐸𝐸_𝐵 𝐵 ℎ𝑚 𝑚 [= 𝑅𝑅] 𝐶𝐶𝐸 𝐸 𝐸 𝐸 𝐸𝐸 [ × 𝐺] 𝐵 𝐵 ℎ𝑚 𝑚 𝐺 𝐺𝐺 𝐺𝐺
Calculate the total benchmark GWP by summing the GWP benchmark for each piece of equipment:
Equation 2. Total GWP benchmark
𝑇 𝑇 𝑇𝑇_𝐵 𝐵 ℎ𝑚 𝑚 𝐸 𝐸 𝐸 𝐸 𝐸𝐸_𝐵 𝐵 ℎ𝑚 𝑚 𝐺 𝐺𝐺 = 𝛴𝛴 𝐺 𝐺𝐺
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
Benchmark calculation
𝑇𝑜 𝑜 _𝐵 𝐵 ℎ𝑚 𝑚
𝐺 𝐺
𝐵 𝐵 ℎ𝑚 𝑚
𝑊 𝑊 ℎ𝑡 𝑡𝑡 𝑎 𝑎 𝑎 𝑎𝑎 𝐺 𝐺𝐺 =
𝛴 𝛴 𝑓 𝑓 𝑎 𝑎 𝑒 𝑒 𝑒 𝑒 𝑒
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
𝑊 𝑊 ℎ𝑡 𝑡 𝑎 𝑎 𝑎 𝑎 𝐺 𝐺
% 𝑜 𝑏 𝑏 ℎ𝑚 𝑚 = 𝐵 𝐵 ℎ𝑚 𝑚
𝑊 𝑊 ℎ𝑡 𝑡 𝑎 𝑎 𝑎 𝑎 𝐺 𝐺
57 “European Union, Regulation (EU) 2024/573 of the European Parliament and of the Council of 7 February 2024 on Fluorinated Greenhouse Gases, Amending Directive (EU) 2019/1937 and Repealing Regulation (EU) No. 517/2014,” European Parliament, Council of the European Union, February 7, 2024, https://eur-lex.europa.eu/eli/reg/2024/573/oj.
U.S. Green Building Council LEED v5 Reference Guide for Interior Design and Construction, April 2025 Launch Edition 228