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LEED BD+C: Schools | v2 - Schools 2007

Daylight & views: daylight 75% of spaces

EQc8.1 | Possible 3 points

Intent

Provide for the building occupants a connection between indoor spaces and the outdoors through the introduction of daylight and views into the regularly occupied areas of the building.

Requirements

Through one of the three optional methodologies, achieve daylighting through one of the three options below in at least the following spaces:

  • 75% of all classroom spaces (1 point), or
  • 90% of all classroom spaces (2 points), or
  • 75% of all other regularly occupied spaces (1 additional point). Project teams can only achieve a point for these other spaces if they have also achieved at least one point for classroom spaces.
Option 1 — Calculation

Achieve a minimum glazing factor of 2%. The glazing factor is calculated as follows:

Glazing Factor Window Area [SF] Window Geometry Factor Actual T vis Window Height Factor
= x x x
Floor Area [SF] Minimum T vis

Option 2 — Simulation

Demonstrate, through computer simulation, that a minimum daylight illumination level of 25 footcandles has been achieved. Modeling must demonstrate 25 horizontal footcandles under clear sky conditions, at noon, on the equinox, at 30 inches above the floor.

Option 3 — Measurement

Demonstrate, through records of indoor light measurements, that a minimum daylight illumination level of 25 footcandles has been achieved. Measurements must be taken on a 10-foot grid for all occupied spaces and must be recorded on building floor plans.

In all cases, only the square footage associated with the portions of rooms or spaces meeting the minimum illumination requirements can be applied towards the calculation required to qualify for this credit.

In all cases, provide daylight redirection and/or glare control devices to avoid high-contrast situations that could impede visual tasks. Exceptions for areas where tasks would be hindered by the use of daylight will be considered on their merits.

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2 commentsLeave a comment

President, BuildingGreen, Inc.

The heading for this credit says one point is possible, but in the details it shows up to three points possible.

I'm also looking at a PDF printed from LEED Online that shows 4 points being possible--was that ever the case? Or was that a mistake in that version of LEED Online? The PDF is dates 8/8/2011, and it's identified as LEED for Schools 2.0.

Manager, LEED, U.S. Green Building Council

Hi Nadav, thanks for catching that. I've corrected the points. As far as I know, there were never 4 points available here (maybe the combination of 8.1 & 8.2 was being shown?).

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