LEED v5 BD+C Rating System_November 2025_clean - Page 169

Extracted Content

PATH 4. DAYLIGHT SIMULATION (1–4 POINTS)

Perform a daylight simulation analysis for the project to understand and optimize access to daylight and visual comfort. Use the calculation protocols in IES LM-83-23 with the following clarifications:

• Calculate s patial daylight autonomy300/50% (sDA300/50%) and annual sunlight exposure1000,250 (ASE1000,250) as defined in IES LM-83-23 for each regularly occupied space in the project. sDA 150/50% may be used for areas without visual tasks with design targets of 225 lux.

• For any regularly occupied spaces with ASEnet(1000,250h) greater than 20%, identify how the space is designed to address glare.

• Calculate the average sDA 300/50% or sDA 150/50% for the total regularly occupied floor area. Do not exclude spaces based on annual sunlight exposure (ASE). Points are awarded based on this calculation, according to Table 2.

Table 2. Points for D aylight Simulation

Average sDA or sDA Value 300/50% 150/50%	Points
≥ 40%	1
≥ 55%	2
≥ 65%	3
≥ 75%	4

U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, November 2025 Edition 162