855773667-LEED-v5-O-M-Reference-Guide-Launch-Edition-1 - Page 149
Extracted Content
gas (NG) (Table B-4), referenced to U.S. EPA published values, and the operating shift multiplier (S) from ASHRAE 100-2024, Table 7-7. [74]
For mixed-use properties with more than one building activity, calculate a weighted average onsite combustion emissions intensity target based on gross floor area and operating shift multiplier of each building activity per Equation 1.
Equation 1.
=
𝑇 𝑇 𝑇 𝑁
∑�𝐺 𝐺 × 𝑁 𝐸 𝐼 × 𝐺 𝐺 𝑒 𝑒 𝑒 𝑒 𝑒 𝑓 𝑓 𝑓𝑟 × 𝑆�𝑓 𝑓 𝑎 𝑎 𝑏 𝑏 𝑏 𝑏 𝑎 𝑎 𝑎 𝑎 𝑎
∑(𝐺 𝐺) 𝑓 𝑓 𝑎 𝑎 𝑏 𝑏 𝑏 𝑏 𝑎 𝑎 𝑎 𝑎 𝑎
𝐺 𝐺 _𝑇 𝑇 𝑇
For more information, refer to the guidance from EAp3: Minimum Energy Performance, Option 2. Energy Use Intensity Targets.
Calculation of project on-site combustion emissions for all Option 1 paths For projects where only one fuel is used for on-site combustion, such as natural gas, total annual on-site combustion emissions are equal to the annual fuel consumption, multiplied by the GHG emissions conversion factor for that fuel.
If multiple fuels are used in the project, sum together the total annual on-site combustion emissions for each fuel.
Refer to the additional guidance in Option 3. Total Greenhouse Gas Emissions from Building Energy Use below addressing GHG emissions conversion factors for fuels.
District heating systems For projects supplied with district heating, either refer to District Energy System (DES) compliance paths in the Project Priorities Library or assign the combustion emissions associated with district heating generation to the project.
Use the published district heating combustion emissions factor, if available, when assigning combustion emissions. A default district heating on-site combustion GHG emissions factor of 66.4 kg/MBTU (227 g/kWh) may be used if this information is unavailable. District energy provider information on the fuel energy input per unit of delivered district heat for each nonelectric fuel used in the district plant(s) can also be used in conjunction with the GHG
74 ASHRAE, “ASHRAE Standards Addenda, Errata, and Interpretations,” n.d., https://www.ashrae.org/technical- resources/standards-and-guidelines/read-only-versions-of-ashrae-standards.
U.S. Green Building Council LEED v5 Reference Guide for Operations and Maintenance, April 2025 Launch Edition 139