855773520-LEED-v5-ID-C-Reference-Guide-Launch-Edition-1 - Page 150

Extracted Content

Table 2. Refrigerant-containing equipment

Application	Equipment/System Type
HVAC, Space Cooling Equipment	Stationary Air Conditioners and Heat Pump Chillers Computer Room Air Conditioning Units
Service Water Heaters	Heat pump Service Water Heaters
Retail	Food Refrigeration Cold Storage
Commercial	Vending Machines Ice Machines
Industrial Process Refrigeration	Process Chillers Ice Rink Chillers Other Process Refrigeration

Data collection For each piece of equipment, document the refrigerant properties, including type of refrigerant, refrigerant GWP (GWPREFRIGERANT), and refrigerant charge (Rc).

When the project design includes field-assembled refrigerant piping with long pipe lengths or large pressure drops (e.g., variable refrigerant flow (VRF) systems, industrial process equipment), teams must account for additional required Rc in the calculations per manufacturer’s specifications or confirm that the manufacturer’s default charge or referenced submittals already account for this additional charge.

Calculate the total equipment GWP for each equipment using Equation 1.

Equation 1. GWPEQUIPMENT calculation

calculation

𝐸 𝐸 𝐸 𝐸 𝐸𝐸 [= 𝑅𝑅] 𝐶𝐶 [× 𝐺] 𝑅 𝑅 𝑅 𝑅 𝑅 𝑅𝑅 𝐺 𝐺𝐺 𝐺𝐺

The project’s total GWP is the sum of the GWP s for all refrigerant-using equipment in the project:

Equation 2. GWPTOTAL calculation

𝑇 𝑇 𝑇𝑇 𝐸 𝑈𝑈𝐼 𝐼 𝐼 𝐺 𝐺𝐺 = � 𝐺 𝐺𝐺

Determine the weighted average GWP for the project by dividing the project’s total GWP by the sum of refrigerant charge for all equipment:

Equation 3. Weighted average GWP calculation

𝑇 𝑇 𝐿 𝐺 𝑊 𝑊 ℎ𝑡 𝑡𝑡 𝐴 𝐴 𝐴 𝐴𝐴 𝐺 𝐺𝐺 = [𝐺] 𝐶 𝛴𝑅

U.S. Green Building Council LEED v5 Reference Guide for Interior Design and Construction, April 2025 Launch Edition 139