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Quality views

EQ9 | Possible point

Intent

To provide building occupants a connection to the outdoors through the introduction of daylight and views into the regularly occupied areas of the building.

To provide building occupants a connection to the outdoors through the introduction of daylight and views into the regularly occupied areas of the building.

To provide building occupants a connection to the outdoors through the introduction of daylight and views into the regularly occupied areas of the building.

To provide building occupants a connection to the outdoors through the introduction of daylight and views into the regularly occupied areas of the building.

To provide for the building occupants a connection to the outdoors through the introduction of daylight and views into the regularly occupied areas1 of the building.

To provide the building occupants a connection to the outdoors through the introduction of daylight and views into the regularly occupied areas1 of the tenant space.

To provide building occupants a connection to the outdoors through the introduction of daylight and views into the regularly occupied areas of the building.

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

To provide a connection between indoor spaces and the outdoor environment through use of daylight and views in the occupied areas of the building.

Provide the occupants with a connection between indoor spaces and the outdoor environment through the introduction of daylight and views into the regularly occupied areas of the tenant space.

Provide a connection between indoor spaces and the outdoor environment through introduction of daylight and views into the occupied areas of the building.

Provide a connection between indoor spaces and the outdoor environment through introduction of daylight and views into the occupied areas of the building.

To provide a connection between indoor spaces and the outdoor environment through use of daylight and views in the occupied areas of the building.

Requirements

Achieve a direct line of sight to the outdoor environment via vision glazing between 30 inches and 90 inches (between 0.8 meters and 2.3 meters) above the finish floor for building occupants in 90% of all regularly occupied areas. Determine the area with a direct line of sight by totaling the regularly occupied floor area that meets the following criteria:

  • In plan view, the area is within sight lines drawn from perimeter vision glazing.
  • In section view, a direct sight line can be drawn from the area to perimeter vision glazing.

The line of sight may be drawn through interior glazing. For private offices, the entire floor area of the office may be counted if 75% or more of the area has a direct line of sight to perimeter vision glazing. For multi-occupant spaces, the actual floor area with a direct line of sight to perimeter vision glazing is counted.

Achieve a direct line of sight to the outdoor environment via vision glazing between 30 inches and 90 inches (between 0.8 meters and 2.3 meters) above the finish floor for building occupants in 90% of all regularly occupied areas. Determine the area with a direct line of sight by totaling the regularly occupied floor area that meets the following criteria:

  • In plan view, the area is within sight lines drawn from perimeter vision glazing.
  • In section view, a direct sight line can be drawn from the area to perimeter vision glazing.

The line of sight may be drawn through interior glazing. For private offices, the entire floor area of the office may be counted if 75% or more of the area has a direct line of sight to perimeter vision glazing. For multi-occupant spaces, the actual floor area with a direct line of sight to perimeter vision glazing is counted.

Credit substitution available

You may use the LEED v4 version of this credit on v2009 projects. For more information check out this article.

Achieve a direct line of sight to the outdoor environment via vision glazing between 30 inches and 90 inches above the finish floor for building occupants in 90% of all regularly occupied areas. Determine the area with a direct line of sight by totaling the regularly occupied square footage that meets the following criteria:

  • In plan view, the area is within sight lines drawn from perimeter vision glazing.
  • In section view, a direct sight line can be drawn from a point 42 inches above the floor (typical seated eye height) to perimeter vision glazing.

The line of sight may be drawn through interior glazing. For private offices, the entire square footage of the office may be counted if 75% or more of the area has a direct line of sight to perimeter vision glazing. If less than 75% of the area has a direct line of sight, only the area with the direct line of sigh count toward meeting the credit requirement. For multi-occupant spaces, the actual square footage with a direct line of sight to perimeter vision glazing is counted.

Credit substitution available

You may use the LEED v4 version of this credit on v2009 projects. For more information check out this article.

Achieve a direct line of sight to the outdoor environment via vision glazing between 30 inches and 90 inches (between 0.8 meters and 2.3 meters) above the finish floor for building occupants in 90% of all regularly occupied areas. Determine the area with a direct line of sight by totaling the regularly occupied floor area that meets the following criteria:

  • In plan view, the area is within sight lines drawn from perimeter vision glazing.
  • In section view, a direct sight line can be drawn from the area to perimeter vision glazing.

The line of sight may be drawn through interior glazing. For private offices, the entire floor area of the office may be counted if 75% or more of the area has a direct line of sight to perimeter vision glazing. For multi-occupant spaces, the actual floor area with a direct line of sight to perimeter vision glazing is counted.

The core and shell design must incorporate a feasible tenant layout(s) per the default occupancy counts (or some other justifiable occupancy count) that can be used in the analysis of this credit.

Achieve a direct line of sight to the outdoor environment via vision glazing between 30 inches and 90 inches above the finish floor for building occupants in 90% of all regularly occupied areas by stationary retail staff and/or customers.
Determine the area with a direct line of sight by totaling the regularly occupied square footage that meets the following criteria:

  • In plan view, the area is within sight lines drawn from perimeter vision glazing.
  • In section view, a direct sight line can be drawn from the area to perimeter vision glazing.

The line of sight may be drawn through interior glazing. For private offices, the entire square footage of the office may be counted if 75% or more of the area has a direct line of sight to perimeter vision glazing. If less than 75% of the area has a direct line of sight, only the area with the direct line of sight counts toward meeting the credit requirement. For multi-occupant spaces, the actual square footage with a direct line of sight to perimeter vision glazing is counted.

Achieve a direct line of sight to the outdoor environment via vision glazing between 30 inches and 90 inches above the finish floor for building occupants in 90% of all regularly occupied areas by stationary retail staff and/or customers.
Determine the area with a direct line of sight by totaling the regularly occupied square footage that meets the following criteria:

  • In plan view, the area is within sight lines drawn from perimeter vision glazing.
  • In section view, a direct sight line can be drawn from the area to perimeter vision glazing.

The line of sight may be drawn through interior glazing. For private offices, the entire square footage of the office may be counted if 75% or more of the area has a direct line of sight to perimeter vision glazing. If less than 75% of the area has a direct line of sight, only the area with the direct line of sight counts toward meeting the credit requirement. For multi-occupant spaces, the actual square footage with a direct line of sight to perimeter vision glazing is counted.

Provide access to views that meet the following criteria below.

INPATIENT UNITS (1 point)

A minimum of 90% of the inpatient units, staff areas, and public areas shall be within 20 feet—or twice the window head height, whichever is smaller—of the perimeter. All such perimeter areas must have windows that provide at least an 11° angle of unobstructed view in the vertical and horizontal direction.

NON-INPATIENT AREAS (1-2 points)

In the block planning stage, configure the building floor plates such that the area within 15 feet of the perimeter exceeds the perimeter area requirement as determined by the table outlined below.

Confirm at the conclusion of detailed planning that 90% of the perimeter rooms have windows that provide at least an 11° angle of unobstructed view in the vertical and horizontal direction.

Perimeter Non-IPU Area with Window Access Required      
Floor plate area (bgsf) Threshold A:
1 point
Threshold B:
2 points
Floor plate area (bgm2) Threshold A:
1 point
Threshold B:
2 points
Up to 15,000 7348 8248 Up to 1,395 683 766
20,000 8785 9985 1,800 816 928
25,000 10087 11587 2,325 937 1076
30,000 11292 13092 2,785 1,049 1,216
35,000 12425 14525 3,250 1,154 1,350
40,000 13500 15900 3,715 1,254 1,477
45,000 14528 17228 4,180 1,350 1,601
50,000 and larger 15516 18516 4,600 and larger 1,441 1,720

For both in-patient and non-inpatient areas, portions of side lit areas beyond the 15’ view area boundary that meet the requirements of IEQ Credit 8.1: Daylight and Views—Daylight may be included in the qualifying areas of this credit.

For calculation methodology for floor plates that vary in size and configuration, see the LEED Reference Guide for Green Building Design & Construction, 2009 Edition Healthcare Supplement.

Project teams must achieve the performance thresholds in either the daylight or views requirements below:

Option 1. Daylight

Through 1 of the 4 paths, achieve daylighting in at least 50% of all regularly occupied spaces.

Path 1. Simulation

Demonstrate through computer simulations that the applicable spaces achieve daylight illuminance levels of a minimum of 10 footcandles (fc) (108 lux) and a maximum of 500 fc (5,400 lux) in a clear sky condition on September 21 at 9 a.m. and 3 p.m.

Provide glare control devices to avoid high-contrast situations that could impede visual tasks. However, designs that incorporate view-preserving automated shades for glare control may demonstrate compliance for only the minimum 10 fc (108 lux) illuminance level.

OR

Path 2. Prescriptive

For sidelighting zones:

  • Achieve a value, calculated as the product of the visible light transmittance (VLT) and window-to-floor area ratio (WFR) of daylight zone between 0.150 and 0.180.
  • 0.150 <

    VLT x

    WFR

    < 0.180

  • The window area included in the calculation must be at least 30 inches (0.8 meters) above the floor.
  • In section, the ceiling must not obstruct a line in that extends from the window-head to a point on the floor that is located twice the height of the window-head from the exterior wall as measured perpendicular to the glass (see diagram below).
  • Provide glare control devices to avoid high-contrast situations that could impede visual tasks. However, designs that incorporate view-preserving automated shades for glare control may demonstrate compliance for only the minimum 0.150 value.

For toplighting zones:

  • The toplighting zone under a skylight is the outline of the opening beneath the skylight, plus in each direction the lesser of (see diagram below):
    • 70% of the ceiling height,
    • 1/2 the distance to the edge of the nearest skylight,
    • The distance to any permanent partition that is closer than 70% of the distance between the top of the partition and the ceiling.
    • Achieve skylight coverage for the applicable space (containing the toplighting zone) between 3% and 6% of the total floor area.
    • The skylight must have a minimum 0.5 VLT.
    • A skylight diffuser, if used, must have a measured haze value of greater than 90% when tested according to ASTM D1003.
Path 3. Measurement

Demonstrate through records of indoor light measurements that a minimum daylight illumination level of10 fc (108 lux) and a maximum of 500 fc (5,400 lux) has been achieved in applicable spaces. Measurements must be taken on a 10-foot (3-meter) grid and recorded on building floor plans.

Provide glare control devices to avoid high-contrast situations that could impede visual tasks. However, designs that incorporate view-preserving automated shades for glare control may demonstrate compliance for only the minimum 10 fc (108 lux) illuminance level.

Path 4. Combination

Any of the above calculation methods may be combined to document the minimum daylight illumination in the applicable spaces.

Option 2. For views

Achieve a direct line of sight to the outdoor environment via vision glazing between 30 inches and 90 inches above the finished floor for building occupants in 45% of all regularly occupied areas. Determine the area with direct line of sight by totaling the regularly occupied square footage that meets the following criteria:

  • In plan view, the area is within sight lines drawn from perimeter vision glazing.
  • In section view, a direct sight line can be drawn from the area to perimeter vision glazing.

The line of sight may be drawn through interior glazing. For private offices, the entire square footage of the office can be counted if 75% or more of the area has a direct line of sight to perimeter vision glazing. For multioccupant spaces, the actual square footage with a direct line of sight to perimeter vision glazing is counted.

  • EQ Credit 2.4 (1 point): Achieve a 2% daylight factor in 50% of all spaces occupied for critical visual tasks.
    OR
    Achieve direct line of sight to vision glazing for building occupants in 45% of regularly occupied spaces.
  • EQ Credit 2.5 (1 point): Achieve a 2% daylight factor in 75% of all spaces occupied for critical visual tasks
    OR
    Achieve direct line of sight to vision glazing for building occupants in 90% of regularly occupied spaces.
For daylight:

Achieve a minimum daylight factor of 2% (excluding all direct sunlight penetration) in space occupied for critical visual tasks, not including copy rooms, storage areas, mechanical, laundry and other low-occupancy support areas. Exceptions include those spaces where tasks would be hindered by daylight or enhanced by direct sunlight. Provide glare control for all windows where direct sunlight would interfere with normal activities. Choose one of the following options:

Option A. Measurement

Demonstrate, through records of indoor light measurements, that a minimum daylight illumination level of
25 foot-candles has been achieved in at least 50% (Credit 2.4) or 75% (Credit 2.5) of all regularly occupied areas. Measurements must be taken on a 10-foot grid for all occupied spaces and must be recorded on building floor plans.

Only the square footage associated with the portions of rooms or spaces meeting the minimum illumination requirements can be counted in the calculations.

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 daylight will be considered on their merits.

Option B. Calculation

Achieve a minimum glazing factor of 2% in a minimum of 50% (Credit 2.4) or 75% (Credit 2.5) of all regularly occupied areas. Calculate the glazing factor as follows:
[INSERT FIGURE HERE]

Option C. Simulation

Demonstrate, through computer simulation, that a minimum daylight illumination level of 25 foot-candles has been achieved in a minimum of 50% (Credit 2.4) or 75% (Credit 2.5) of all regularly occupied areas. Modeling must demonstrate 25 horizontal foot-candles under clear sky conditions, at noon on the equinox, at 30 inches above the floor.

For views:

Achieve direct line of sight to the outdoor environment via vision glazing between 2’6” and 7’6” above the finished floor for building occupants in 45% (Credit 2.4) or 90% (Credit 2.5) of all regularly occupied areas. Determine the area with direct line of sight by totaling the regularly occupied square footage that meets the following criteria:

  • In plan view, the area is within sight lines drawn from perimeter vision glazing.
  • In section view, a direct sight line can be drawn from the area to perimeter vision glazing.

Line of sight may be drawn through interior glazing. For private offices, the entire square footage of the office can be counted if 75% or more of the area has direct line of sight to perimeter vision glazing. For multioccupant spaces, the actual square footage with direct line of sight to perimeter vision glazing is counted.

Achieve direct line of sight to the outdoor environment (vision glazing between 2’-6” and 7’-6”) for building occupants in 90% of all regularly occupied areas. Determine the area with direct line of sight by totaling the regularly occupied square footage that meets the following criteria:

  • In plan view, the area is within sight lines drawn from perimeter vision glazing.
  • In section view, a direct sight line can be drawn from a point 42 in. above the floor to perimeter vision glazing.

Line of sight may be drawn through interior glazing. For private offices, the entire square footage of the office can be counted if 75% or more of the area has direct line of sight to perimeter vision glazing. If less than 75% of the area has direct line of sight then only the area with the direct line of sight will be counted towards meeting the credit requirement not the whole office area. For multi-occupant spaces, the actual square footage with direct line of sight to perimeter vision glazing is counted.

Develop and adopt a space churn renovation plan and policy that specifies the goal of achieving direct line of sight to vision glazing for building occupants from 90% of all regularly occupied spaces (not including copy rooms, storage areas, mechanical, laundry and other low-occupancy support areas).

AND
  • IEQ Credit 8.3: Achieve direct line of sight to vision glazing for building occupants from 45% of regularly occupied spaces. (1 point)
  • IEQ Credit 8.4: Achieve direct line of sight to vision glazing for building occupants from 90% of regularly occupied spaces. (1 point)

Regularly occupied spaces are considered as having access to views if they provide direct line of sight to vision glazing, where horizontal view angles to the vision glazing are not less than 10 degrees (must include partition base and glazing frame if appropriate). Vision glazing is vertical windows between 2’6” and 7’6” above the floor. Views to vision glazing may be direct or through interior windows.

Develop and adopt a space churn renovation plan and policy that specifies the goal of achieving direct line of sight to vision glazing for building occupants from 90% of all regularly occupied spaces (not including copy rooms, storage areas, mechanical, laundry and other low-occupancy support areas).

AND
  • IEQ Credit 8.3: Achieve direct line of sight to vision glazing for building occupants from 45% of regularly occupied spaces. (1 point)
  • IEQ Credit 8.4: Achieve direct line of sight to vision glazing for building occupants from 90% of regularly occupied spaces. (1 point)

Regularly occupied spaces are considered as having access to views if they provide direct line of sight to vision glazing, where horizontal view angles to the vision glazing are not less than 10 degrees (must include partition base and glazing frame if appropriate). Vision glazing is vertical windows between 2’6” and 7’6” above the floor. Views to vision glazing may be direct or through interior windows.

  • EQ Credit 2.4 (1 point): Achieve a 2% daylight factor in 50% of all spaces occupied for critical visual tasks.
    OR
    Achieve direct line of sight to vision glazing for building occupants in 45% of regularly occupied spaces.
  • EQ Credit 2.5 (1 point): Achieve a 2% daylight factor in 75% of all spaces occupied for critical visual tasks
    OR
    Achieve direct line of sight to vision glazing for building occupants in 90% of regularly occupied spaces.
For daylight:

Achieve a minimum daylight factor of 2% (excluding all direct sunlight penetration) in space occupied for critical visual tasks, not including copy rooms, storage areas, mechanical, laundry and other low-occupancy support areas. Exceptions include those spaces where tasks would be hindered by daylight or enhanced by direct sunlight. Provide glare control for all windows where direct sunlight would interfere with normal activities. Choose one of the following options:

Option A. Measurement

Demonstrate, through records of indoor light measurements, that a minimum daylight illumination level of
25 foot-candles has been achieved in at least 50% (Credit 2.4) or 75% (Credit 2.5) of all regularly occupied areas. Measurements must be taken on a 10-foot grid for all occupied spaces and must be recorded on building floor plans.

Only the square footage associated with the portions of rooms or spaces meeting the minimum illumination requirements can be counted in the calculations.

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 daylight will be considered on their merits.

Option B. Calculation

Achieve a minimum glazing factor of 2% in a minimum of 50% (Credit 2.4) or 75% (Credit 2.5) of all regularly occupied areas. Calculate the glazing factor as follows:
[INSERT FIGURE HERE]

Option C. Simulation

Demonstrate, through computer simulation, that a minimum daylight illumination level of 25 foot-candles has been achieved in a minimum of 50% (Credit 2.4) or 75% (Credit 2.5) of all regularly occupied areas. Modeling must demonstrate 25 horizontal foot-candles under clear sky conditions, at noon on the equinox, at 30 inches above the floor.

For views:

Achieve direct line of sight to the outdoor environment via vision glazing between 2’6” and 7’6” above the finished floor for building occupants in 45% (Credit 2.4) or 90% (Credit 2.5) of all regularly occupied areas. Determine the area with direct line of sight by totaling the regularly occupied square footage that meets the following criteria:

  • In plan view, the area is within sight lines drawn from perimeter vision glazing.
  • In section view, a direct sight line can be drawn from the area to perimeter vision glazing.

Line of sight may be drawn through interior glazing. For private offices, the entire square footage of the office can be counted if 75% or more of the area has direct line of sight to perimeter vision glazing. For multioccupant spaces, the actual square footage with direct line of sight to perimeter vision glazing is counted.

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