855773644-LEED-v5-BD-C-Reference-Guide-Launch-Edition - Page 289

Extracted Content

Core and Shell only

Path 1. No On-site Combustion and Path 2. No On-site Combustion Except at Low Temperatures . Assess weighted average COP based on the total capacity necessary to meet project loads, regardless of whether the project scope installs the equipment. Use a COP of 1.0 for future heating or service water heating capacity that is not in the project scope.

Path 3. No On-Site Combustion — Limited Scope . Assess weighted average COP based on the project scope of work.

METHODOLOGIES FOR WEIGHTED AVERAGE COP DETERMINATION

Projects may determine weighted average COP using a streamlined method, rated capacities, or energy simulation.

Method 1. Streamlined Weighted Average COP Determination

The streamlined method conservatively estimates compliance based on ASHRAE 90.1, Section 6.8 mandatory rated heating efficiencies of at least 2.0 COP for heat pumps and heat recovery chillers.

• To confirm a weighted average COP of at least 1.8, document that at least 80% of equipment capacity consists of heat pumps, heat recovery chillers, or solar heating.

• To confirm a weighted average COP of at least 1.3, document that at least 30% of equipment capacity consists of heat pumps, heat recovery chillers, or solar heating.

For New Construction and Core and Shell Path 3, assess compliance based on total installed equipment capacity.

For Core and Shell Paths 1 and 2, assess compliance based on the total capacity necessary to meet project loads.

Method 2. Energy Simulation

Calculate the COP by dividing total annual heating generation by total annual heating energy consumption (using consistent units in numerator and denominator) per Equation 1.

U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, April 2025 Launch Edition 279