855773644-LEED-v5-BD-C-Reference-Guide-Launch-Edition - Page 290

Extracted Content

Equation 1. COP calculation using energy simulation data

𝐶𝑂𝑃= [T𝑜𝑡𝑎𝑙 𝑎𝑛𝑛𝑢𝑎𝑙 ℎ𝑒𝑎𝑡𝑖𝑛𝑔 𝑔𝑒𝑛𝑒𝑟𝑎𝑡𝑖𝑜𝑛]

T𝑜𝑡𝑎𝑙 𝑎𝑛𝑛𝑢𝑎𝑙 ℎ𝑒𝑎𝑡𝑖𝑛𝑔 𝑐𝑜𝑛𝑠𝑢𝑚𝑝𝑡𝑖𝑜𝑛

Include all applicable space heating and service water heating energy used at the plant, system, and zone levels.

Projects may use any of the following to document the weighted average COP:

• Modeling used for EAp2: Minimum Energy Efficiency

o ASHRAE 90.1, Appendix G Performance Rating Method, proposed model.

o ASHRAE 90.1, Energy Cost Budget Method design energy cost model.

o Total System Performance Ratio (TSPR). Simplified model from ASHRAE 90.1-2022,

Section 6.6.2.2 Mechanical System Performance Rating Method. This only shows space heating efficiency. Demonstrate service water heating compliance using one of the other methods.

• Energy simulation used to document local code compliance.

• Simplified energy simulation used to estimate energy consumption for EAp1: Operational Carbon Projection and Decarbonization Plan, provided the model inputs include sufficient detail relevant to equipment efficiencies, capacities, and loads estimations.

For Core and Shell Paths 1 and 2, modifications to these models or post-processing of modeled results may be necessary to show a COP of 1.0 for all future capacities not in the project scope of work.

Method 3. Rated Capacities

Calculate the weighted average COP based on the capacity-weighted average rated equipment efficiency per Equation 2.

Equation 2. Weighted average COP

𝑊𝑒𝑖𝑔ℎ𝑡𝑒𝑑 a𝑣𝑒𝑟𝑎𝑔𝑒 𝐶𝑂𝑃

=

∑𝑟𝑎𝑡𝑒𝑑 𝑐𝑎𝑝𝑎𝑐𝑖𝑡𝑦 𝑜𝑓 𝑒𝑎𝑐ℎ 𝑒𝑞𝑢𝑖𝑝𝑚𝑒𝑛𝑡 × 𝑟𝑎𝑡𝑒𝑑 𝐶𝑂𝑃 𝑜𝑓 𝑒𝑎𝑐ℎ 𝑒𝑞𝑢𝑖𝑝𝑚𝑒𝑛𝑡

𝑡𝑜𝑡𝑎𝑙 𝑟𝑎𝑡𝑒𝑑 𝑒𝑞𝑢𝑖𝑝𝑚𝑒𝑛𝑡 𝑐𝑎𝑝𝑎𝑐𝑖𝑡𝑦 𝑜𝑓 𝑎𝑙𝑙 𝑒𝑞𝑢𝑖𝑝𝑚𝑒𝑛𝑡

If equipment has more than one rated condition, calculate the weighted average COP using the rated conditions closest to the following:

• Air source heat pumps . 17°F (-9°C) OA db

U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, April 2025 Launch Edition 280