855773520-LEED-v5-ID-C-Reference-Guide-Launch-Edition-1 - Page 166
Extracted Content
o TSPR. Simplified model from ASHRAE 90.1-2022, Section 6.6.2.2 Mechanical
System Performance Rating Method. This only shows space heating efficiency. SWH compliance must be demonstrated using one of the other methods.
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Energy simulation used to document local code compliance
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Simplified energy simulation used to estimate energy consumption for EAp1: Operational Carbon Projection and Operational Carbon Projection, provided that the model inputs include sufficient detail relevant to equipment efficiencies, capacities, and loads estimations
METHOD 3. RATED CAPACITIES Calculate weighted average COP based on the capacity-weighted average rated equipment efficiency per Equation 2.
Equation 2. Weighted average COP
=
∑𝑟 𝑟 𝑟 𝑐 𝑐 𝑐 𝑐 𝑜 𝑒 𝑒ℎ 𝑒 𝑒 𝑒 𝑒 𝑒 × 𝑟 𝑟 𝑟 𝐶 𝐶 𝑜 𝑒 𝑒ℎ 𝑒 𝑒 𝑒 𝑒 𝑒
𝑡 𝑡 𝑡 𝑟 𝑟 𝑟 𝑒 𝑒 𝑒 𝑒 𝑒 𝑐 𝑐 𝑐 𝑐 𝑜 𝑎 𝑎 𝑒 𝑒 𝑒 𝑒 𝑒
𝑊 𝑊 ℎ𝑡 𝑡 𝐴 𝐴 𝐴 𝐴 𝐶 𝐶
If equipment has more than one rated condition, calculate the weighted average COP using the rated conditions closest to the following:
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Air source heat pumps . 17°F (-9°C) OA db
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Ground source heat pumps . 32°F (0°C) entering liquid temperature
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Liquid source heat pump and heat recovery water-chilling packages . 44 °F (6°C) heating source leaving liquid temperature
Reference ASHRAE 90.1, Section 6.8 tables to identify applicable rated conditions. For equipment with efficiency ratings using HSPF, AFUE, or any rating other than COP or COPH, convert these ratings to COP using Table 3 below before calculating weighted average COP.
Additional considerations For heat pump water-chilling packages or heat recovery water-chilling packages rated per ASHRAE 90.1, Table 6.8.1-16, COP may be adjusted using the equations from Table 3 below to align equipment ratings for entering/leaving heating liquid temperature at medium, high, or boost conditions with the default low ratings.
U.S. Green Building Council LEED v5 Reference Guide for Interior Design and Construction, April 2025 Launch Edition 155