Daylight | U.S. Green Building Council
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LEED BD+C: New Construction | v4 - LEED v4

Daylight

Possible 3 points

Submittal Tips (click to expand)
Keep these important GBCI reviewer tips in mind when preparing your submittal documentation and avoid some of the common issues reviewers see during the LEED review process.

EQ Credit: Daylight

  • Be sure that the floor plans highlight regularly occupied spaces and daylit areas/zones. Reference the EQ Overview section of the LEED Reference Guide for examples of regularly occupied versus non-regularly occupied spaces. For LEED for Healthcare projects, the entire floor plate (except for the core) should be considered regularly occupied space.
  • Remember to provide the Supplemental Daylight and Views Calculation Spreadsheet and confirm that the results have been correctly input into the LEED Form.
  • Describe all glare control devices provided for all regularly occupied spaces and specify whether each device is manually controlled or automatic with manual override. If automatic with manual override, ensure the sequence of operation is described.
Option 1. Simulation: Spatial Daylight Autonomy
  • The daylight simulations should use the same building information and methodology, be performed at 30 inches above the floor (or at appropriate desk/work height for the space) at a two-foot or less calculation interval, and include permanent interior obstructions.
Option 2. Simulation: Illuminance Calculations
  • The daylight simulation model should be performed with clear sky conditions at 9 a.m. and 3 p.m. within 15 days of each equinox, using the project’s geographic location, and at 30 inches above the floor (or at appropriate desk/work height for the space) at five-foot or less calculation interval. Illuminance intensity for sun and sky should be calculated using typical meteorological year data for the nearest weather station (average of the hourly value for both equinox 15-day window). Permanent interior obstructions should be included but blinds/shades should be excluded.
Option 3. Measurement
  • Project drawings should include the recorded daylight measurements and show they were conducted at 30 inches above the floor (or at appropriate desk/work height for the space). Furniture, fixtures, and equipment must be in place during the testing.
Option 1 Simulation Method: Tips From a Daylight Modeler

Advice from the Experts