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  1. Light
  2. Daylight modeling

Daylight modeling

Features>Light>62. Daylight modeling

62. Daylight modeling

Exposure to appropriate amounts of natural light provides a connection to nature that reinforces circadian rhythms and reduces dependence on electricity for artificial lighting. Buildings can be designed to ensure that people who spend the majority of their time indoors still have access to daylight.

This feature requires that individuals inside a building receive ample exposure to natural sunlight.

Part 2: Healing Sunlight Exposure

Lighting simulations demonstrate that the following conditions are true:

a.1 Spatial daylight autonomy (sDA300,50%) is achieved for at least 75% of perimeter floor area.
b.1 Annual sunlight exposure (aSE1000,250) is achieved for no more than 10% of perimeter floor area.
Part 2: Sound Masking Limits

If sound masking systems are used, sound levels fall within the following range, when measured from the nearest workspace:

a.90 Open office spaces: 45 - 48 dBA.
b.90 Enclosed offices: 40 - 42 dBA.
Nervous
Lymphatic
Endocrine
Muscular
Cardiovascular
Digestive
Reproductive
Immune

Applicability Matrix

Core & Shell Tenant Improvement New Construction
Part 2: Healing Sunlight Exposure - - -
Part 2: Sound Masking Limits - O O
Commercial Kitchen Schools Multifamily Residential Restaurant Retail
Part 2: Healing Sunlight Exposure - - - - -
Part 2: Sound Masking Limits - - - - -

Verification Methods Matrix

Letters of Assurance Annotated Documents On-Site Checks
PART 2 (Performance)
Sound Masking Limits 		Performance Test

1

U.S. Green Building Council. LEED v4: Reference Guide for Building Design and Construction. Washington D.C.: U.S. Green Building Council; 2013: 37, 43-44, 541-552, 567, 605, 623, 645-53, 658-61, 682-3, 685-6, 723-4.
62.1.a

USGBC's LEED v4 EQ Credit: Daylight, Option 1 requires that at least 55% of space receives at least 300 lux of sunlight for an award of 2 points.
62.1.b

LUSGBC's LEED v4 EQ Credit: Daylight, Option 1 requires that annual sunlight exposure ASE(1000,250) is achieved for no more than 10% of regularly occupied space.
Features>Light>62. Daylight modeling