"Meet the minimum requirements of Sections 4 through 7 of ASHRAE Standard 62.1-2007, Ventilation for Acceptable Indoor Air Quality (with errata but without addenda¹).

AND

CASE 1. Mechanically Ventilated Spaces
Mechanical ventilation systems must be designed using the ventilation rate procedure or the applicable local code, whichever is more stringent.

CASE 2. Naturally Ventilated Spaces
Naturally ventilated buildings must comply with ASHRAE Standard 62.1-2007, Paragraph 5.1 (with errata but without addenda¹).

¹ Project teams wishing to use ASHRAE approved addenda for the purposes of this prerequisite may do so at their discretion. Addenda must be applied consistently across all LEED credits."

- LEED 2009 for New Construction and Major Renovations Rating System, page 57

"Meet the minimum requirements of Sections 4 through 7 of ASHRAE 62.1-2004, Ventilation for Acceptable Indoor Air Quality. Mechanical ventilation systems shall be designed using the Ventilation Rate Procedure or the applicable local code, whichever is more stringent. Naturally ventilated buildings shall comply with ASHRAE 62.1-2004, paragraph 5.1."

- LEED for New Construction Version 2.2 Reference Guide, page 289

"Meet the minimum requirements of voluntary consensus standard ASHRAE 62-1999, Ventilation for Acceptable Indoor Air Quality, and approved Addenda (see ASHRAE 62-2001, Appendix H, for a complete compilation of Addenda) using the Ventilation Rate Procedure."

- LEED-NC Version 2.1 Reference Guide, page 241

• "Demonstrate compliance with the applicable sections of ASHRAE 62.1-2007; see Calculations."

- LEED-NC version 3 Reference Guide, page 412

(Complete descriptions of documentation requirements are on LEED-Online)

• "Design narrative describing the project's ventilation design. Include specific information regarding fresh air intake volumes and any special conditions that affected the project's ventilation design.

AND

• For Mechanically Ventilated Buildings: confirmation that the project has been designed to meet the minimum requirements of ASHRAE Standard 62.1-2004, Ventilation for Acceptable Indoor Air Quality, using the Ventilation Rate Procedure.

OR

• For Naturally Ventilated Buildings: confirmation that the project has been designed to comply with the requirements for location and size of window openings per ASHRAE Standard 62.1-2004, Section 5.1."

- LEED for New Construction Version 2.2 Reference Guide, page 292

"Provide the LEED Letter Template, signed by the mechanical engineer or responsible party, declaring that the project is fully compliant with ASHRAE 62-1999 and all published Addenda and describing the procedure employed in the IAQ analysis (Ventilation Rate Procedure)."

- LEED-NC Version 2.1 Reference Guide, page 241

"CASE 1. All Projects

OPTION 1
Prohibit smoking in the building.

Prohibit on-property smoking within 25 feet of entries, outdoor air intakes and operable windows. Provide signage to allow smoking in designated areas, prohibit smoking in designated areas or prohibit smoking on the entire property.

OR

OPTION 2
Prohibit smoking in the building except in designated smoking areas.

Prohibit on-property smoking within 25 feet of entries, outdoor air intakes and operable windows. Provide signage to allow smoking in designated areas, prohibit smoking in designated areas or prohibit smoking on the entire property.

Provide designated smoking rooms designed to contain, capture and remove ETS from the building. At a minimum, the smoking room must be directly exhausted to the outdoors, away from air intakes and building entry paths, with no recirculation of ETS-containing air to nonsmoking areas and enclosed with impermeable deck-to-deck partitions. Operate exhaust sufficient to create a negative pressure differential with the surrounding spaces of at least an average of 5 Pascals (Pa) (0.02 inches of water gauge) and a minimum of 1 Pa (0.004 inches of water gauge) when the doors to the smoking rooms are closed.

Verify performance of the smoking rooms’ differential air pressures by conducting 15 minutes of measurement, with a minimum of 1 measurement every 10 seconds, of the differential pressure in the smoking room with respect to each adjacent area and in each adjacent vertical chase with the doors to the smoking room closed. Conduct the testing with each space configured for worst-case conditions of transport of air from the smoking rooms (with closed doors) to adjacent spaces.

CASE 2. Residential and Hospitality Projects Only

Prohibit smoking in all common areas of the building.

Locate any exterior designated smoking areas, including balconies where smoking is permitted, at least 25 feet from entries, outdoor air intakes and operable windows opening to common areas.

Prohibit on-property smoking within 25 feet of entries, outdoor air intakes and operable windows. Provide signage to allow smoking in designated areas, prohibit smoking in designated areas or prohibit smoking on the entire property.

Weather-strip all exterior doors and operable windows in the residential units to minimize leakage from outdoors.

Minimize uncontrolled pathways for ETS transfer between individual residential units by sealing penetrations in walls, ceilings and floors in the residential units and by sealing vertical chases adjacent to the units.

Weather-strip all doors in the residential units leading to common hallways to minimize air leakage into the hallway¹.

Demonstrate acceptable sealing of residential units by a blower door test conducted in accordance with ANSI/ ASTM-E779-03, Standard Test Method for Determining Air Leakage Rate By Fan Pressurization.

Use the progressive sampling methodology defined in Chapter 4 (Compliance Through Quality Construction) of the Residential Manual for Compliance with California’s 2001 Energy Efficiency Standards (http://www.energy. ca.gov/title24/residential_manual). Residential units must demonstrate less than 1.25 square inches leakage area per 100 square feet of enclosure area (i.e., sum of all wall, ceiling and floor areas).

¹ If the common hallways are pressurized with respect to the residential units then doors in the residential units leading to the common hallways need not be weather-stripped provided that the positive differential pressure is demonstrated as in Case 1, Option 2 above, considering the residential unit as the smoking room."

- LEED 2009 for New Construction and Major Renovations Rating System, page 58-59

"OPTION 1

• Prohibit smoking in the building.
• Locate any exterior designated smoking areas at least 25 feet away from entries, outdoor air intakes and operable windows.

OR

OPTION 2

• Prohibit smoking in the building except in designated smoking areas.
• Locate any exterior designated smoking areas at least 25 feet away from entries, outdoor air intakes and operable windows.
• Locate designated smoking rooms to effectively contain, capture and remove ETS from the building. At a minimum, the smoking room must be directly exhausted to the outdoors with no re-circulation of ETS-containing air to the non-smoking area of the building, and enclosed with impermeable deck-to-deck partitions. With the doors to the smoking room closed, operate exhaust sufficient to create a negative pressure with respect to the adjacent spaces of at least an average of 5 Pa (0.02 inches of water gauge) and with a minimum of 1 Pa (0.004 inches of water gauge).
• Performance of the smoking room differential air pressures shall be verified by conducting 15 minutes of measurement, with a minimum of one measurement every 10 seconds, of the differential pressure in the smoking room with respect to each adjacent area and in each adjacent vertical chase with the doors to the smoking room closed. The testing will be conducted with each space configured for worst case conditions of transport of air from the smoking rooms to adjacent spaces with the smoking rooms’ doors closed to the adjacent spaces.

OR

OPTION 3 (For residential buildings only)

• Prohibit smoking in all common areas of the building.
• Locate any exterior designated smoking areas at least 25 feet away from entries, outdoor air intakes and operable windows opening to common areas.
• Minimize uncontrolled pathways for ETS transfer between individual residential units by sealing penetrations in walls, ceilings and floors in the residential units, and by sealing vertical chases adjacent to the units.
• All doors in the residential units leading to common hallways shall be weather-stripped to minimize air leakage into the hallway.
• If the common hallways are pressurized with respect to the residential units then doors in the residential units leading to the common hallways need not be weather-stripped provided that the positive differential pressure is demonstrated as in Option 2 above, considering the residential unit as the smoking room. Acceptable sealing of residential units shall be demonstrated by a blower door test conducted in accordance with ANSI/ASTM-E779-03, Standard Test Method for Determining Air Leakage Rate By Fan Pressurization, AND use the progressive sampling methodology defined in Chapter 4 (Compliance Through Quality Construction) of the Residential Manual for Compliance with California’s 2001 Energy Efficiency Standards (www.energy.ca.gov/title24/residential_manual). Residential units must demonstrate less than 1.25 square inches leakage area per 100 square feet of enclosure area (i.e. sum of all wall, ceiling and floor areas)."

- LEED-NC Version 2.2 Reference Guide, pages 295-296

"Zero exposure of non-smokers to ETS [Environmental Tobacco Smoke] by EITHER:

• prohibiting smoking in the building and locating any exterior designated smoking areas away from entries and operable windows;

OR

• providing a designated smoking room designed to effectively contain, capture and remove ETS from the building. At a minimum, the smoking room must be directly exhausted to the outdoors with no recirculation of ETS-containing air to the non-smoking area of the building, enclosed with impermeable deck-to-deck partitions and operated at a negative pressure compared with the surrounding spaces of at least 7 PA (0.03 inches of water gauge).
• Performance of the smoking rooms shall be verified by using tracer gas testing methods as described in the ASHRAE Standard 129-1997. Acceptable exposure in non-smoking areas is defined as less than 1% of the tracer gas concentration in the smoking room detectable in the adjoining non-smoking areas. Smoking room testing as described in ASHRAE Standard 129-1997 is required in the contract documents and critical smoking facility systems testing results must be included in the building commissioning plan and report or as a separate document."

- LEED-NC Version 2.1 Reference Guide, page 245

• "Develop an environmental tobacco smoke policy that details areas where smoking is prohibited.
• Maintain documentation (e.g., site plans and renderings) that visually indicates how the smoking policy has been implemented on-site.
• Track and record testing data for any interior smoking rooms to verify that there is no cross contamination to adjacent spaces."

- LEED-NC version 3 Reference Guide, page 419

(Complete descriptions of documentation requirements are on LEED-Online)

• "Confirmation that the project has met the requirements for the appropriate project category: Non-Smoking Building; Building with Designated Smoking Rooms; or Residential Project
• For buildings with interior smoking rooms or for residential projects, provide appropriate copies of construction drawings to document the location of the smoking rooms, designed area separations, and dedicated ventilation systems.
• An option narrative may be provided to further describe the testing protocols/results and compliance methods implemented by the project."

- LEED-NC Version 2.2 Reference Guide, pages 297-298

• "Provide the LEED Letter Template, signed by the building owner or responsible party, declaring that the building will be operated under a policy prohibiting smoking.

OR

• Provide the LEED Letter Template, signed by the mechanical engineer or responsible party, declaring and demonstrating that designated smoking rooms are exhausted to the outdoors with no recirculation of ETS-containing air to the nonsmoking area of the building, enclosed with impermeable deck-to-deck partitions, operated at a negative pressure compared with the surrounding spaces of at least 7 PA (0.03 inches of water gauge), and performance has been verified using the method described in the credit requirements."

- LEED-NC Version 2.1 Reference Guide, page 245

"Install permanent monitoring systems to ensure that ventilation systems maintain design minimum requirements. Configure all monitoring equipment to generate an alarm when airflow values or carbon dioxide (CO2) levels vary by 10% or more from the design values via either a building automation system alarm to the building operator or a visual or audible alert to the building occupants

AND

CASE 1. Mechanically Ventilated Spaces
Monitor CO2 concentrations within all densely occupied spaces (those with a design occupant density of 25 people or more per 1,000 square feet). CO2 monitors must be between 3 and 6 feet above the floor.

Provide a direct outdoor airflow measurement device capable of measuring the minimum outdoor air intake flow with an accuracy of plus or minus 15% of the design minimum outdoor air rate, as defined by ASHRAE Standard 62.1-2007 (with errata but without addenda¹) for mechanical ventilation systems where 20% or more of the design supply airflow serves nondensely occupied spaces.

CASE 2. Naturally Ventilated Spaces
Monitor CO2 concentrations within all naturally ventilated spaces. CO2 monitors must be between 3 and 6 feet above the floor. One CO2 sensor may be used to monitor multiple nondensely occupied spaces if the natural ventilation design uses passive stack(s) or other means to induce airflow through those spaces equally and simultaneously without intervention by building occupants.²

¹ Project teams wishing to use ASHRAE approved addenda for the purposes of this credit may do so at their discretion. Addenda must be applied consistently across all LEED credits.
² CO2 monitoring is required in densely occupied spaces, in addition to outdoor air intake flow measurement."

- LEED 2009 for New Construction and Major Renovations Rating System, page 60

"Install permanent monitoring systems that provide feedback on ventilation system performance to ensure that ventilation systems maintain design minimum ventilation requirements. Configure all monitoring equipment to generate an alarm when the conditions vary by 10% or more from setpoint, via either a building automation system alarm to the building operator or via a visual or audible alert to the building occupants.

FOR MECHANICALLY VENTILATED SPACES

• Monitor carbon dioxide concentrations within all densely occupied spaces (those with a design occupant density greater than or equal to 25 people per 1000 sq.ft.). CO2 monitoring locations shall be between 3 feet and 6 feet above the floor.
• For each mechanical ventilation system serving non-densely occupied spaces, provide a direct outdoor airflow measurement device capable of measuring the minimum outdoor airflow rate with an accuracy of plus or minus 15% of the design minimum outdoor air rate, as defined by ASHRAE 62.1-2004.

FOR NATURALLY VENTILATED SPACES

Monitor CO2 concentrations within all naturally ventilated spaces. CO2 monitoring shall be located within the room between 3 feet and 6 feet above the floor. One CO2 sensor may be used to represent multiple spaces if the natural ventilation design uses passive stack(s) or other means to induce airflow through those spaces equally and simultaneously without intervention by building occupants."

- LEED-NC Version 2.2 Reference Guide, page 301

"Install a permanent carbon dioxide (CO2) monitoring system that provides feedback on space ventilation performance in a form that affords operational adjustments. Refer to the CO2 differential for all types of occupancy in accordance with ASHRAE 62- 2001, Appendix C."

- LEED-NC Version 2.1 Reference Guide, page 249

• "Incorporate airflow monitors and CO₂ sensors into floor plans, schematics, elevations (where applicable), and mechanical schedules.
• Commission ventilation systems to monitor for excess energy use.
• Alarm systems should be checked to verify settings according to ANSI/ASHRAE 62.1-2007 for mechanical ventilation systems.
• Any automated building systems used for the project should be calibrated according to manufacturer guidellines. Routine function checks of alarm systems are recommended."

- LEED-NC version 3 Reference Guide, page 440

(Complete descriptions of documentation requirements are on LEED-Online)

• "Confirmation of the type of ventilation system and installed controls.
• Design narrative describing the project's ventilation design and CO2 monitoring system. Include specific information regarding location and quantity of installed monitors, operational parameters and setpoints.
• Provide copies of the applicable project drawings to document the location and type of installed sensors. Drawings should also show natural ventilation components (operable windows, air intakes, etc.) as applicable."

- LEED-NC Version 2.2 Reference Guide, page 304

"Provide the LEED Letter Template, signed by the mechanical engineer or responsible party, declaring and summarizing the installation, operational design and controls/zones for the carbon dioxide monitoring system. For mixed-use buildings, calculate CO2 levels for each separate activity level and use."

- LEED-NC Version 2.1 Reference Guide, page 249

"CASE 1. Mechanically Ventilated Spaces
Increase breathing zone outdoor air ventilation rates to all occupied spaces by at least 30% above the minimum rates required by ASHRAE Standard 62.1-2007 (with errata but without addenda1) as determined by IEQ Prerequisite 1: Minimum Indoor Air Quality Performance.

CASE 2. Naturally Ventilated Spaces
Design natural ventilation systems for occupied spaces to meet the recommendations set forth in the Chartered Institution of Building Services Engineers (CIBSE) Applications Manual 10: 2005, Natural Ventilation in Nondomestic Buildings. Determine that natural ventilation is an effective strategy for the project by following the flow diagram process shown in Figure 2.8 of the CIBSE Applications Manual 10.

AND

OPTION 1
Use diagrams and calculations to show that the design of the natural ventilation systems meets the recommendations set forth in the CIBSE Applications Manual 10: 2005, Natural Ventilation in Non-domestic Buildings, CIBSE AM 13 (Mixed Mode Ventilation), or natural ventilation/mixed mode ventilation related sections of the CIBSE Guide B2 (Ventilation and Air Conditioning).

OR

OPTION 2
Use a macroscopic, multizone, analytic model to predict that room-by-room airflows will effectively naturally ventilate, defined as providing the minimum ventilation rates required by ASHRAE 62.1-2007 Chapter 6 (with errata but without addenda¹), for at least 90% of occupied spaces.

¹ Project teams wishing to use ASHRAE approved addenda for the purposes of this credit may do so at their discretion. Addenda must be applied consistently across all LEED credits."

- LEED 2009 for New Construction and Major Renovations Rating System, page 61

"FOR MECHANICALLY VENTILATED SPACES

• Increase breathing zone outdoor air ventilation rates to all occupied spaces by at least 30% above the minimum rates required by ASHRAE Standard 62.1-2004 as determined by EQ Prerequisite 1.

FOR NATURALLY VENTILATED SPACES

• Design natural ventilation systems for occupied spaces to meet the recommendations set forth in the Carbon Trust “Good Practice Guide 237” [1998]. Determine that natural ventilation is an effective strategy for the project by following the flow diagram process shown in Figure 1.18 of the Chartered Institution of Building Services Engineers (CIBSE) Applications Manual 10: 2005, Natural ventilation in non-domestic buildings.

AND

• Use diagrams and calculations to show that the design of the natural ventilation systems meets the recommendations set forth in the CIBSE Applications Manual 10: 2005, Natural ventilation in non-domestic buildings.

OR

• Use a macroscopic, multi-zone, analytic model to predict that room-by-room airflows will effectively naturally ventilate, defined as providing the minimum ventilation rates required by ASHRAE 62.1-2004 Chapter 6, for at least 90% of occupied spaces."

- LEED-NC Version 2.2 Reference Guide, page 307

"For mechanically ventilated buildings, design ventilation systems that result in an air change effectiveness (Eac) greater than or equal to 0.9 as determined by ASHRAE 129-1997. For naturally ventilated spaces demonstrate a distribution and laminar flow pattern that involves not less than 90% of the room or zone area in the direction of air flow for at least 95% of hours of occupancy."

- LEED-NC Version 2.1 Reference Guide, page 253

• "Size mechanical equipment to accommodate increased ventilation rates.
• For naturally ventilated projects, maintain appropriate visual documentation (e.g., plans) of open areas within the project."

- LEED-NC Version 3 Reference Guide, page 449

(Complete descriptions of documentation requirements are on LEED-Online)

Mechanically Ventilated Buildings:
“1) Confirm that the ventilation zone breathing rate in all occupied spaces have been designed to exceed the minimum rates required by ASHRAE 62.1-2004, or the local code, whichever is more stringent, by a minimum of 30%.

2) Design a narrative describing the project's ventilation system design. Include specific information regarding the fresh air intake volume for each specific occupied zone to demonstrate that the design exceeds the referenced standard, or the local code, whichever is more stringent, by a minimum of 30%."

Naturally Ventilated Buildings:

"1) Confirmation that the natural ventilation system has been designed to meet the recommendations set forth in the Carbon Trust Good Practice Guide 237 (1998).

2) Design narrative describing the design method (CISBE Method/Analytic Model) utilized in determining the natural ventilation design for the project. Provide specific information regarding calculation methodology and/or model results to demonstrate that the ventilation design complies with the referenced standard."

- LEED-NC Version 2.2 Reference Guide, page 312

"For mechanically ventilated spaces: provide the LEED Letter Template, signed by the mechanical engineer or responsible party, declaring that the design achieves an air change effectiveness (Eac) of 0.9 or greater in each ventilated zone. Complete the table summarizing the air change effectiveness achieved for each zone.

OR

For mechanically ventilated spaces: provide the LEED Letter Template, signed by the mechanical engineer or responsible party, declaring that the design complies with the recommended design approaches in ASHRAE 2001 Fundamentals Handbook Chapter 32, Space Air Diffusion. Complete the table summarizing the air change effectiveness achieved for each zone (must be 0.9 or greater).

OR

For naturally ventilated spaces: provide the LEED Letter Template, signed by the mechanical engineer or responsible party, declaring that the design provides effective ventilation in at least 90% of each room or zone area in the direction of airflow for at least 95% of hours of occupancy. Include a table summarizing the airflow simulation results for each zone. Include sketches indicating the airflow pattern for each zone."

- LEED-NC Version 2.1 Reference Guide, page 253

Develop and implement an IAQ management plan for the construction and preoccupancy phases ofthe tenant space as follows:

• "During construction, meet or exceed the recommended control measures of the Sheet Metal and Air Conditioning National Contractors Association (SMACNA) IAQ Guidelines For Occupied Buildings Under Construction, 2nd Edition 2007, ANSI/SMACNA 008-2008 (Chapter 3).
• Protect stored on-site and installed absorptive materials from moisture damage.
• If permanently installed air handlers are used during construction, filtration media with a minimum efficiency reporting value (MERV) of 8 must be used at each return air grille, as determined by ASHRAE Standard 52.2- 1999 (with errata but without addenda¹). Replace all filtration media immediately prior to occupancy."

¹ Project teams wishing to use ASHRAE approved addenda for the purposes of this credit may do so at their discretion. Addenda must be applied consistently across all LEED credits.

- LEED 2009 for New Construction and Major Renovations Rating System, page 63

"Develop and implement an Indoor Air Quality (IAQ) Management Plan for the construction and pre-occupancy phases of the building as follows:

• During construction meet or exceed the recommended Control Measures of the Sheet Metal and Air Conditioning National Contractors Association (SMACNA) IAQ Guidelines for Occupied Buildings under Construction, 1995, Chapter 3.
• Protect stored on-site or installed absorptive materials from moisture damage.
• If permanently installed air handlers are used during construction, filtration media with a Minimum Efficiency Reporting Value (MERV) of 8 shall be used at each return air grille, as determined by ASHRAE 52.2-1999. Replace all filtration media immediately prior to occupancy."

- LEED-NC Version 2.2 Reference Guide, page 317

"Develop and implement an Indoor Air Quality (IAQ) Management Plan for the construction and pre-occupancy phases of the building as follows:

• During construction meet or exceed the recommended Design Approaches of the Sheet Metal and Air Conditioning National Contractors Association (SMACNA) IAQ Guideline for Occupied Buildings under Construction, 1995, Chapter 3.
• Protect stored on-site or installed absorptive materials from moisture damage.
• If air handlers must be used during construction, filtration media with a Minimum Efficiency Reporting Value (MERV) of 8 must be used at each return air grill, as determined by ASHRAE 52.2-1999.
• Replace all filtration media immediately prior to occupancy. Filtration media shall have a Minimum Efficiency Reporting Value (MERV) of 13, as determined by ASHRAE 52.2-1999 for media installed at the end of construction."

- LEED-NC Version 2.1 Reference Guide, page 261

• "Create a written construction IAQ management plan for use during demolition and construction.
• Maintain a detailed photo log of the construction IAQ management plan practices followed during construction."

- LEED-NC Version 3 Reference Guide, page 457

(Complete descriptions of documentation requirements are on LEED-Online)

• "Provide a copy of the project's Indoor Air Quality (IAQ) Management Plan.
• Confirm if the permanently installed air handling equipment was used during construction.
• Provide photos to highlight the implemented construction IAQ practices.
• List all filtration media (manufacturer, model #, MERV rating, location of installed filter) installed during construction and confirm that each was replaced prior to final occupancy.
• Provide an optional narrative describing any special circumstances or non-standard approaches taken by the project."

- LEED-NC Version 2.2 Reference Guide, page 320

• "Provide the LEED Letter Template, signed by the general contractor or responsible party, declaring that a Construction IAQ Management Plan has been developed and implemented, and listing each air filter used during construction and at the end of construction. Include the MERV value, manufacturer name and model number.

AND EITHER

• Provide 18 photographs—six photographs taken on three different occasions during construction—along with identification of the SMACNA approach featured by each photograph, in order to show consistent adherence to the credit requirements.

OR

• Declare the five Design Approaches of SMACNA IAQ Guideline for Occupied Buildings under Construction, 1995, Chapter 3, which were used during building construction. Include a brief description of some of the important design approaches employed."

- LEED-NC Version 2.1 Reference Guide, page 261

"OPTION 1. Flush-Out¹

PATH 1
After construction ends, prior to occupancy and with all interior finishes installed, install new filtration media and, perform a building flush-out by supplying a total air volume of 14,000 cubic feet of outdoor air per square foot of floor area while maintaining an internal temperature of at least 60° F and relative humidity no higher than 60%.

OR

PATH 2
If occupancy is desired prior to completion of the flush-out, the space may be occupied following delivery of a minimum of 3,500 cubic feet of outdoor air per square foot of floor area. Once the space is occupied, it must be ventilated at a minimum rate of 0.30 cubic feet per minute (cfm) per square foot of outside air or the design minimum outside air rate determined in IEQ Prerequisite 1: Minimum Indoor Air Quality Performance, whichever is greater. During each day of the flush-out period, ventilation must begin a minimum of 3 hours prior to occupancy and continue during occupancy. These conditions must be maintained until a total of 14,000 cubic feet per square foot of outside air has been delivered to the space.

OR

OPTION 2. Air Testing
Conduct baseline IAQ testing after construction ends and prior to occupancy using testing protocols consistent with the EPA Compendium of Methods for the Determination of Air Pollutants in Indoor Air and as additionally detailed in the LEED Reference Guide for Green Building Design and Construction, 2009 Edition.

¹ All finishes must be installed prior to flush-out.

Demonstrate that the contaminant maximum concentration levels listed below are not exceeded:

For each sampling point where the maximum concentration limits are exceeded, conduct an additional flushout with outside air and retest the noncompliant concentrations. Repeat until all requirements are met. When retesting noncompliant building areas, take samples from the same locations as in the first test, although it is not required.

Conduct the air sample testing as follows:

• All measurements must be conducted prior to occupancy, but during normal occupied hours with the building ventilation system started at the normal daily start time and operated at the minimum outside air flow rate for the occupied mode throughout the test.
• All interior finishes must be installed, including but not limited to millwork, doors, paint, carpet and acoustic tiles. Movable furnishings such as workstations and partitions should be in place for the testing, although it is not required.
• The number of sampling locations will depend on the size of the building and number of ventilation systems. For each portion of the building served by a separate ventilation system, the number of sampling points must not be less than 1 per 25,000 square feet or for each contiguous floor area, whichever is larger. Include areas with the least ventilation and greatest presumed source strength.
• Air samples must be collected between 3 and 6 feet from the floor to represent the breathing zone of occupants, and over a minimum 4-hour period."

- LEED 2009 for New Construction and Major Renovations Rating System, page 64-65

"Develop and implement an Indoor Air Quality (IAQ) Management Plan for the pre-occupancy phase as follows:

OPTION 1 — Flush-Out

• After construction ends, prior to occupancy and with all interior finishes installed, perform a building flush-out by supplying a total air volume of 14,000 cu.ft. of outdoor air per sq.ft. of floor area while maintaining an internal temperature of at least 60 degrees F and relative humidity no higher than 60%.

OR

• If occupancy is desired prior to completion of the flush-out, the space may be occupied following delivery of a minimum of 3,500 cu.ft. of outdoor air per sq.ft. of floor area to the space. Once a space is occupied, it shall be ventilated at a minimum rate of 0.30 cfm/sq.ft. of outside air or the design minimum outside air rate determined in EQ Prerequisite 1, whichever is greater. During each day of the flush-out period, ventilation shall begin a minimum of three hours prior to occupancy and continue during occupancy. These conditions shall be maintained until a total of 14,000 cu.ft./sq.ft. of outside air has been delivered to the space.

OR

OPTION 2 — Air Testing

• Conduct baseline IAQ testing, after construction ends and prior to occupancy, using testing protocols consistent with the United States Environmental Protection Agency Compendium of Methods for the Determination of Air Pollutants in Indoor Air and as additionally detailed in the Reference Guide.
• Demonstrate that the contaminant maximum concentrations listed below are not exceeded.

CONTAMINANT MAXIMUM CONCENTRATION
Formaldehyde 50 parts per billion
Particulates (PM10) 50 micrograms per cubic meter
Total Volatile Organic Compounds (TVOC) 500 micrograms per cubic meter
* 4-Phenylcyclohexene (4-PCH) 6.5 micrograms per cubic meter Carbon Monoxide (CO) 9 part per million and no greater than 2 parts per million above outdoor levels
* This test is only required if carpets and fabrics with styrene butadiene rubber (SBR) latex backing material are installed as part of the base building systems.

• For each sampling point where the maximum concentration limits are exceeded conduct additional flush-out with outside air and retest the specific parameter(s) exceeded to indicate the requirements are achieved. Repeat procedure until all requirements have been met. When retesting non-complying building areas, take samples from the same locations as in the first test.
• The air sample testing shall be conducted as follows:
  1) All measurements shall be conducted prior to occupancy, but during normal occupied hours, and with the building ventilation system starting at the normal daily start time and operated at the minimum outside air flow rate for the occupied mode throughout the duration of the air testing.
  2) The building shall have all interior finishes installed, including but not limited to millwork, doors, paint, carpet and acoustic tiles. Non-fixed furnishings such as workstations and partitions are encouraged, but not required, to be in place for the testing.
  3) The number of sampling locations will vary depending upon the size of the building and number of ventilation systems. For each portion of the building served by a separate ventilation system, the number of sampling points shall not be less than one per 25,000 sq.ft., or for each contiguous floor area, whichever is larger, and include areas with the least ventilation and greatest presumed source strength.
  4) Air samples shall be collected between 3 feet and 6 feet from the floor to represent the breathing zone of occupants, and over a minimum 4-hour period."

- LEED-NC Version 2.2 Reference Guide, page 323-324

"Develop and implement an Indoor Air Quality (IAQ) Management Plan for the preoccupancy phase as follows:

• After construction ends and prior to occupancy conduct a minimum two week building flush-out with new Minimum Efficiency Reporting Value (MERV) 13 filtration media at 100% outside air. After the flush-out, replace the filtration media with new MERV 13 filtration media, except the filters solely processing outside air.

OR

• Conduct a baseline indoor air quality testing procedure consistent with the U.S. Environmental Protection Agency’s current Protocol for Environmental Requirements, Baseline IAQ and Materials, for the Research Triangle Park Campus, Section 01445."

- LEED-NC Version 2.1 Reference Guide, page 262

• "Maintain a written construction IAQ management plan.
• For projects completing a flush-out procedure, record dates, occupancy, outdoor air delivery rates, internal temperature, and humidity, as well as any special considerations.
• For projects completing IAQ testing, maintain a copy of the testing report and verify that all required contaminants are accounted for and reported in the correct unit of measure."

- LEED-NC Version 3 Reference Guide, page 467

(Complete descriptions of documentation requirements are on LEED-Online)

• "Confirmation of the approach taken by the project (pre-occupancy flush-out; flush-out with early occupancy; IAQ testing)
• A copy of the project's Indoor Air Quality testing report (if applicable)
• A narrative describing the project's specific flush-out procedures and/or IAQ testing process and results"

- LEED-NC Version 2.2 Reference Guide, page 328

• "Provide the LEED Letter Template, signed by the architect, general contractor or responsible party, describing the building flush-out procedures and dates.

OR

• Provide the LEED Letter Template, signed by the architect or responsible party, declaring that the referenced standard’s IAQ testing protocol has been followed. Include a copy of the testing results."

- LEED-NC Version 2.1 Reference Guide, page 262

"All adhesives and sealants used on the interior of the building (i.e., inside of the weatherproofing system and applied on-site) must comply with the following requirements as applicable to the project scope¹:

• Adhesives, Sealants and Sealant Primers must comply with South Coast Air Quality Management District (SCAQMD) Rule #1168. Volatile organic compound (VOC) limits listed in the table below correspond to an effective date of July 1, 2005 and rule amendment date of January 7, 2005.

¹ The use of a VOC budget is permissible for compliance with this credit.

• Aerosol Adhesives must comply with Green Seal Standard for Commercial Adhesives GS-36 requirements in effect on October 19, 2000."

- LEED 2009 for New Construction and Major Renovations Rating System, page 66-67

"All adhesives and sealants used on the interior of the building (defined as inside of the weatherproofing system and applied on-site) shall comply with the requirements of the following reference standards:

• Adhesives, Sealants and Sealant Primers: South Coast Air Quality Management District (SCAQMD) Rule #1168. VOC limits are listed in the table below and correspond to an effective date of July 1, 2005 and rule amendment date of January 7, 2005.

Architectural Applications VOC Limit [g/L less water] Specialty Applications VOC Limit [g/L less water] Indoor Carpet Adhesives 50 PVC Welding 510 Carpet Pad Adhesives 50 CPVC Welding 490 Wood Flooring Adhesives 100 ABS Welding 325 Rubber Floor Adhesives 60 Plastic Cement Welding 250 Subfloor Adhesives 50 Adhesive Primer for Plastic 550 Ceramic Tile Adhesives 65 Contact Adhesive 80 VCT & Asphalt Adhesives 50 Special Purpose Contact Adhesive 250 Drywall & Panel Adhesives 50 Structural Wood Member Adhesive 140 Cove Base Adhesives 50 Sheet Applied Rubber Lining Operations 850 Multipurpose Construction Adhesives 70 Top & Trim Adhesive 250 Structural Glazing Adhesives 100 Substrate Specific Applications VOC Limit [g/L less water] Sealants VOC Limit [g/L less water] Metal to Metal 30 Architectural 250 Plastic Foams 50 Nonmembrane Roof 300 Porous Material (except wood) 50 Roadway 250 Wood 30 Single-Ply Roof Membrane 450 Fiberglass 80 Other 420 Sealant Primers VOC Limit [g/L less water] Architectural Non Porous 250 Architectural Porous 775 Other 750

• Aerosol Adhesives: Green Seal Standard for Commercial Adhesives GS-36 requirements in effect on October 19, 2000.

Aerosol Adhesives: VOC weight [g/L minus water]
General purpose mist spray 65% VOCs by weight
General purpose web spray 55% VOCs by weight
Special purpose aerosol adhesives (all types) 70% VOCs by weight

- LEED-NC Version 2.2 Reference Guide, pages 333-334

“The VOC content of adhesives and sealants used must be less than the current VOC content limits of South Coast Air Quality Management District (SCAQMD) Rule #1168, AND all sealants used as fillers must meet or exceed the requirements of the Bay Area Air Quality Management District Regulation 8, Rule 51."

- LEED-NC Version 2.1 Reference Guide, page 269

• "Maintain a list of each indoor aerosol adhesive product, sealants and sealant primers used on a project. Include the manufacturer's name, product name, and specific VOC data (g/L, less water) for each product, as well as the corresponding allowable VOC from the referenced standard.
• Track the amount of product used if the VOC budget approach is taken."

- LEED-NC Version 3 Reference Guide, page 477

(Complete descriptions of documentation requirements are on LEED-Online)

• "Provide a listing of each indoor adhesive, sealant, and sealant primer produce used on the project. Include the manufacturer's name, product name, specific VOC data (in g/L, less water) for each product, and the corresponding allowable VOC from the reference standard.
• Provide a listing of each indoor aerosol adhesive product used on the project. Include the manufacturer's name, product name, specific VOC data (in g/L, less water) for each product, and the corresponding allowable VOC from the reference standard.
• Provide a narrative to describe any special circumstances or non-standard compliance paths taken by the project."

- LEED-NC Version 2.1 Reference Guide, page 335

“Provide the LEED Letter Template, signed by the architect or responsible party, listing the adhesives and sealants used in the building and declaring that they meet the noted requirements."

- LEED-NC Version 2.1 Reference Guide, page 269

"Paints and coatings used on the interior of the building (i.e., inside of the weatherproofing system and applied onsite) must comply with the following criteria as applicable to the project scope¹:

• Architectural paints and coatings applied to interior walls and ceilings must not exceed the volatile organic compound (VOC) content limits established in Green Seal Standard GS-11, Paints, 1st Edition, May 20, 1993.
• Anti-corrosive and anti-rust paints applied to interior ferrous metal substrates must not exceed the VOC content limit of 250 g/L established in Green Seal Standard GC-03, Anti-Corrosive Paints, 2nd Edition, January 7, 1997.
• Clear wood finishes, floor coatings, stains, primers, and shellacs applied to interior elements must not exceed the VOC content limits established in South Coast Air Quality Management District (SCAQMD) Rule 1113, Architectural Coatings, rules in effect on January 1, 2004."

¹ The use of a VOC budget is permissible for compliance with this credit.

"Paints and coatings used on the interior of the building (defined as inside of the weatherproofing system and applied on-site) shall comply with the following criteria:

• Architectural paints, coatings and primers applied to interior walls and ceilings: Do not exceed the VOC content limits established in Green Seal Standard GS-11, Paints, First Edition, May 20, 1993.
  • Flats: 50 g/L
  • Non-Flats: 150 g/L
• Anti-corrosive and anti-rust paints applied to interior ferrous metal substrates: Do not exceed the VOC content limit of 250 g/L established in Green Seal Standard GC-03, Anti-Corrosive Paints, Second Edition, January 7, 1997.
• Clear wood finishes, floor coatings, stains, and shellacs applied to interior elements: Do not exceed the VOC content limits established in South Coast Air Quality Management District (SCAQMD) Rule 1113, Architectural Coatings, rules in effect on January 1, 2004.
  • Clear wood finishes: varnish 350 g/L; lacquer 550 g/L
  • Floor coatings: 100 g/L
  • Sealers: waterproofing sealers 250 g/L; sanding sealers 275 g/L; all other sealers 200 g/L
  • Shellacs: Clear 730 g/L; pigmented 550 g/L
  • Stains: 250 g/L"

- LEED-NC Version 2.2 Reference Guide, page 337

"VOC emissions from paints and coatings must not exceed the VOC and chemical component limits of Green Seal Standard GS-11 requirements."

- LEED-NC Version 2.1 Reference Guide, page 270

• "Maintain a list of each indoor paint and coating product used. Include the manufacturer's name, product name, and specific VOC data (in g/L, less water) for each product, as well as the corresponding allowable VOC from the referenced standard.
• Track the amount of product used if the VOC budget approach is taken."

- LEED-NC Version 3 Reference Guide, page 484

(Complete descriptions of documentation requirements are on LEED-Online)

• "Provide a listing of each indoor paint and coating used on the project. Include the manufacturer's name, product name, specific VOC data (in g/L, less water) for each product, and the corresponding allowable VOC from the reference standard.
• Provide a narrative to describe any special circumstances or non-standard compliance paths taken by the project."

- LEED-NC Version 2.1 Reference Guide, page 338

"Provide the LEED Letter Template, signed by the architect or responsible party, listing all the interior paints and coatings used in the building that are addressed by Green Seal Standard GS-11 and stating that they comply with the current VOC and chemical component limits of the standard."

- LEED-NC Version 2.1 Reference Guide, page 270

"OPTION 1
All flooring must comply with the following as applicable to the project scope:

• All carpet installed in the building interior must meet the testing and product requirements of the Carpet and Rug Institute Green Label Plus1 program.
• All carpet cushion installed in the building interior must meet the requirements of the Carpet and Rug Institute Green Label program.
• All carpet adhesive must meet the requirements of IEQ Credit 4.1: Adhesives and Sealants, which includes a volatile organic compound (VOC) limit of 50 g/L.
• All hard surface flooring must be certified as compliant with the FloorScore2 standard (current as of the date of this rating system, or more stringent version) by an independent third-party. Flooring products covered by FloorScore include vinyl, linoleum, laminate flooring, wood flooring, ceramic flooring, rubber flooring and wall base.
• An alternative compliance path using FloorScore is acceptable for credit achievement: 100% of the non-carpet finished flooring must be FloorScore-certified and must constitute at least 25% of the finished floor area. Examples of unfinished flooring include floors in mechanical rooms, electrical rooms and elevator service rooms.
• Concrete, wood, bamboo and cork floor finishes such as sealer, stain and finish must meet the requirements of South Coast Air Quality Management District (SCAQMD) Rule 1113, Architectural Coatings, rules in effect on January 1, 2004.
• Tile setting adhesives and grout must meet South Coast Air Quality Management District (SCAQMD) Rule 1168. VOC limits correspond to an effective date of July 1, 2005 and rule amendment date of January 7, 2005.

OR

OPTION 2
All flooring elements installed in the building interior must meet the testing and product requirements of the California Department of Health Services Standard Practice for the Testing of Volatile Organic Emissions from Various Sources Using Small-Scale Environmental Chambers, including 2004 Addenda.

¹ The Green Label Plus program for carpets and its associated VOC emission criteria in micrograms per square meter per hour, along with information on testing method and sample collection developed by the Carpet & Rug Institute (CRI) in coordination with California’s Sustainable Building Task Force and the California Department of Public Health, are described in Section 9, Acceptable Emissions Testing for Carpet, DHS Standard Practice CA/DHS/EHLB/R-174, dated 07/15/04. This document is available at http://www.dhs.ca.gov/ps/deodc/ehlb/iaq/ VOCS/Section01350_7_15_2004_FINAL_PLUS_ADDENDUM-2004-01.pdf (also published as Section 01350 Section 9 [dated 2004] by the Collaborative for High Performance Schools [http://www.chps.net]).

² FloorScore is a voluntary, independent certification program that tests and certifies hard surface flooring and associated products for compliance with criteria adopted in California for indoor air emissions of VOCs with potential health effects. The program uses a smallscale chamber test protocol and incorporates VOC emissions criteria, which are widely known as Section 1350, developed by the California Department of Health Services."

- LEED 2009 for New Construction and Major Renovations Rating System, page 69-70

"All carpet installed in the building interior shall meet the testing and product requirements of the Carpet and Rug Institute’s Green Label Plus program.
All carpet cushion installed in the building interior shall meet the requirements of the Carpet and Rug Institute Green Label program. All carpet adhesive shall meet the requirements of EQ Credit 4.1: VOC limit of 50 g/L."

- LEED-NC Version 2.2 Reference Guide, page 341

"Carpet systems must meet or exceed the requirements of the Carpet and Rug Institute’s Green Label Indoor Air Quality Test Program."

-LEED-NC Version 2.1 Reference Guide, page 271

• "Maintain a list of each carpet, carpet cushion, and carpet adhesive installed in the building interior. Record the VOC content for each adhesive.
• Maintain a list of each hard surface flooring product, tile setting adhesive, finishes, and grout installed in the building interior. Record the VOC content for each tile setting adhesive and grout."

- LEED-NC Version 3 Reference Guide, page 491

(Complete descriptions of documentation requirements are on LEED-Online)

• "Provide a listing of each carpet product installed in the building interior. Confirm that the product complies with the CRI Green Label Plus testing program.
• Provide a listing of each carpet cushion project installed in the building interior. Confirm that the project complies with the CRI Green Label testing program.
• Provide a narrative to describe any special circumstances or non-standard compliance paths taken by the project."

-LEED-NC Version 2.2 Reference Guide, page 342

"Provide the LEED Letter Template, signed by the architect or responsible party, listing all the carpet systems used in the building and stating that they comply with the current VOC limits of the Carpet and Rug Institute’s Green Label Indoor Air Quality Test Program."

- LEED-NC Version 2.1 Reference Guide, page 271

"Composite wood and agrifiber products used on the interior of the building (i.e., inside the weatherproofing system) must contain no added urea-formaldehyde resins. Laminating adhesives used to fabricate on-site and shop-applied composite wood and agrifiber assemblies must not contain added urea-formaldehyde resins.

Composite wood and agrifiber products are defined as particleboard, medium density fiberboard (MDF), plywood, wheatboard, strawboard, panel substrates and door cores. Materials considered fixtures, furniture and equipment (FF&E) are not considered base building elements and are not included."

- LEED 2009 for New Construction and Major Renovations Rating System, page 71

"Composite wood and agrifiber products used on the interior of the building (defined as inside of the weatherproofing system) shall contain no added urea-formaldehyde resins. Laminating adhesives used to fabricate on-site and shop-applied composite wood and agrifiber assemblies shall contain no added urea-formaldehyde resins. Composite wood and agrifiber products are defined as: particleboard, medium density fiberboard (MDF), plywood, wheatboard, strawboard, panel substrates and door cores. Materials considered fit-out, furniture, and equipment (FF&E) are not considered base building elements and are not included."

- LEED-NC Version 2.2 Reference Guide, page 345

"Composite wood and agrifiber products must contain no added urea formaldehyde resins."

- LEED-NC Version 2.1 Reference Guide, page 272

• "Maintain a list of each composite wood and agrifiber product installed in the building interior. Confirm that each product does not contain any added urea-formaldehyde."

- LEED-NC Version 3 Reference Guide, page 497

(Complete descriptions of documentation requirements are on LEED-Online)

• "Provide a listing of each composite wood and agrifiber product installed in the building interior. Confirm that each product does not contain any added urea-formaldehyde.
• Provide a narrative to describe any special circumstances or non-standard compliance paths taken by the project."

- LEED-NC Version 2.2 Reference Guide, page 346

"Provide the LEED Letter Template, signed by the architect or responsible party, listing all the composite wood products used in the building and stating that they contain no added urea-formaldehyde resins."

- LEED-NC Version 2.1 Reference Guide, page 272

"Design to minimize and control the entry of pollutants into buildings and later cross-contamination of regularly occupied areas through the following strategies:

• Employ permanent entryway systems at least 10 feet long in the primary direction of travel to capture dirt and particulates entering the building at regularly used exterior entrances. Acceptable entryway systems include permanently installed grates, grill s and slotted systems that allow for cleaning underneath. Roll-out mats are acceptable only when maintained on a weekly basis by a contracted service organization.
• Sufficiently exhaust each space where hazardous gases or chemicals may be present or used (e.g., garages, housekeeping and laundry areas, copying and printing rooms) to create negative pressure with respect to adjacent spaces when the doors to the room are closed. For each of these spaces, provide self-closing doors and deck-to-deck partitions or a hard-lid ceiling. The exhaust rate must be at least 0.50 cubic feet per minute (cfm) per square foot with no air recirculation. The pressure differential with the surrounding spaces must be at least 5 Pascals (Pa) (0.02 inches of water gauge) on average and 1 Pa (0.004 inches of water) at a minimum when the doors to the rooms are closed.
• In mechanically ventilated buildings, install new air filtration media in regularly occupied areas prior to occupancy; these filters must provide a minimum efficiency reporting value (MERV) of 13 or higher. Filtration should be applied to process both return and outside air that is delivered as supply air.
• Provide containment (i.e. a closed container for storage for off-site disposal in a regulatory compliant storage area, preferably outside the building) for appropriate disposal of hazardous liquid wastes in places where water and chemical concentrate mixing occurs (e.g., housekeeping, janitorial and science laboratories)."

- LEED 2009 for New Construction and Major Renovations Rating System, page 72

"Design to minimize and control pollutant entry into buildings and later cross-contamination of regularly occupied areas:

• Employ permanent entryway systems at least six feet long in the primary direction of travel to capture dirt and particulates from entering the building at all entryways that are directly connected to the outdoors. Acceptable entryway systems include permanently installed grates, grilles, or slotted systems that allow for cleaning underneath. Roll-out mats are only acceptable when maintained on a weekly basis by a contracted service organization. Qualifying entryways are those that serve as regular entry points for building users.
• Where hazardous gases or chemicals may be present or used (including garages, housekeeping/laundry areas and copying/printing rooms), exhaust each space sufficiently to create negative pressure with respect to adjacent spaces with the doors to the room closed. For each of these spaces, provide self-closing doors and deck to deck partitions or a hard lid ceiling. The exhaust rate shall be at least 0.50 cfm/sq.ft., with no air recirculation. The pressure differential with the surrounding spaces shall be at least 5 Pa (0.02 inches of water gauge) on average and 1 Pa (0.004 inches of water) at a minimum when the doors to the rooms are closed.
• In mechanically ventilated buildings, provide regularly occupied areas of the building with air filtration media prior to occupancy that provides a Minimum Efficiency Reporting Value (MERV) of 13 or better. Filtration should be applied to process both return and outside air that is to be delivered as supply air."

-LEED-NC Version 2.2 Reference Guide, page 353

"Design to minimize pollutant cross-contamination of regularly occupied areas:

• Employ permanent entryway systems (grills, grates, etc.) to capture dirt, particulates, etc. from entering the building at all high volume entryways.
• Where chemical use occurs (including housekeeping areas and copying/printing rooms), provide segregated areas with deck to deck partitions with separate outside exhaust at a rate of at least 0.50 cubic feet per minute per square foot, no air re-circulation and maintaining a negative pressure of at least 7 PA (0.03 inches of water gauge).
• Provide drains plumbed for appropriate disposal of liquid waste in spaces where water and chemical concentrate mixing occurs."

-LEED-NC Version 2.1 Reference Guide, page 279

• "Retain visual documentation of the location and size of all permanent entryway systems and walk-off mats.
• Create a table listing entryway systems.
• Create a building maintenance plan that includes a description of cleaning and maintenance for permanent entryway systems and walk-off mats necessary to manage contaminants brought into the building.
• Create a list of rooms or areas that require separation.
• Detail deck-to-deck partitions or hard-lid conditions at rooms known to have contaminants.
• As the project evolves, review negative pressure calculations at hazardous chemical areas to assure proper depressurization.
• Maintain product literature for MERV 13, or higher filters."

- LEED-NC Version 3 Reference Guide, page 515-516

(Complete descriptions of documentation requirements are on LEED-Online)

• "Provide confirmation that required entryway systems have been provided.
• Provide a listing of each entryway product installed in the building. For roll-up or carpeted systems, confirm that the required contracted maintenance will take place.
• Provide copies of the project's construction drawings to highlight the location of the installed entryway systems.
• Confirm that chemical use areas have been designed as separate rooms with dedicated exhaust systems and appropriate negative pressurization.
• Provide copies of the project's mechanical drawings to highlight the location of chemical usage areas, room separations, and the associated exhaust systems.
• If mechanically ventilated, confirm that the installed filters have a MERV rating of 13 or better.
• Provide a listing of the installed filters and their associated MERV ratings.
• Provide a narrative to describe any special circumstances or non-standard compliance paths taken by the project."

- LEED-NC Version 2.2 Reference Guide, page 353

"Provide the LEED Letter Template, signed by the architect or responsible party, declaring that:

• Permanent entryway systems (grilles, grates, etc.) to capture dirt, particulates, etc. are provided at all high volume entryways.
• Chemical use areas and copy rooms have been physically separated with deck-to-deck partitions; independent exhaust ventilation has been installed at 0.50 cfm/square foot and that a negative pressure differential of 7 PA has been achieved.
• In spaces where water and chemical concentrate mixing occurs, drains are plumbed for environmentally appropriate disposal of liquid waste."

- LEED-NC Version 2.1 Reference Guide, page 279

"Provide individual lighting controls for 90% (minimum) of the building occupants to enable adjustments to suit individual task needs and preferences.

Provide lighting system controls for all shared multi-occupant spaces to enable adjustments that meet group needs and preferences."

- LEED 2009 for New Construction and Major Renovations Rating System, page 73

"Provide individual lighting controls for 90% (minimum) of the building occupants to enable adjustments to suit individual task needs and preferences.

AND

Provide lighting system controllability for all shared multi-occupant spaces to enable lighting adjustment that meets group needs and preferences."

- LEED-NC Version 2.2 Reference Guide, page 357

"Provide at least an average of one operable window and one lighting control zone per 200 square feet for all regularly occupied areas within 15 feet of the perimeter wall."

- LEED-NC Version 2.1 Reference Guide, page 283

• "Maintain a floor plan that indicates the location, zoning, and type of lighting controls. The floor plan should include furniture layout, indicating individual and shared work areas.
• Retain design information on task lighting, sensors, and lighting controls."

- LEED-NC Version 3 Reference Guide, page 523

(Complete descriptions of documentation requirements are on LEED-Online)

• "For individual workstation controls, provide a listing of the total number of individual workstations and lighting controls.
• For shared multi-occupant space control, provide a listing of the project's group multi-occupant spaces and a description of the installed lighting controls.
• Provide a narrative describing the project's lighting control strategy. Include data regarding the type and location of individual controls (general area illumination controls for multi-workstation spaces may not be counted towards this credit) and also the type and location of controls provided for shared multi-occupant spaces."

- LEED-NC Version 2.2 Reference Guide, page 359

"Provide the LEED Letter Template, signed by the architect or responsible party, demonstrating and declaring that for regularly occupied perimeter areas of the building a minimum of one operable window and one lighting control zone are provided per 200 square feet on average."

- LEED-NC Version 2.1 Reference Guide, page 283

"Provide individual comfort controls for 50% (minimum) of the building occupants to enable adjustments to meet individual needs and preferences. Operable windows may be used in lieu of controls for occupants located 20 feet inside and 10 feet to either side of the operable part of a window. The areas of operable window must meet the requirements of ASHRAE Standard 62.1-2007 paragraph 5.1 Natural Ventilation (with errata but without addenda²).

Provide comfort system controls for all shared multi-occupant spaces to enable adjustments that meet group needs and preferences.

Conditions for thermal comfort are described in ASHRAE Standard 55-2004 (with errata but without addenda²) and include the primary factors of air temperature, radiant temperature, air speed and humidity.

² Project teams wishing to use ASHRAE approved addenda for the purposes of this credit may do so at their discretion. Addenda must be applied consistently across all LEED credits."

- LEED 2009 for New Construction and Major Renovations Rating System, page 74

"Provide individual comfort controls for 50% (minimum) of the building occupants to enable adjustments to suit individual task needs and preferences. Operable windows can be used in lieu of comfort controls for occupants of areas that are 20 feet inside of and 10 feet to either side of the operable part of the window. The areas of operable window must meet the requirements of ASHRAE 62.1-2004 paragraph 5.1 Natural Ventilation.

AND

Provide comfort system controls for all shared multi-occupant spaces to enable adjustments to suit group needs and preferences. Conditions for thermal comfort are described in ASHRAE Standard 55-2004 to include the primary factors of air temperature, radiant temperature, air speed and humidity. Comfort system control for the purposes of this credit is defined as the provision of control over at least one of these primary factors in the occupant’s local environment."

-LEED-NC Version 2.2 Reference Guide, page 361

"Provide controls for each individual for airflow, temperature and lighting for at least 50% of the occupants in non-perimeter, regularly occupied areas."

- LEED-NC Version 2.1 Reference Guide, page 284

• "For individual workstation controls, maintain a list of the total number of individual workstations and thermal controls.
• For shared multioccupant space control, maintain a list of a project's group multioccupant spaces and a description of the installed thermal controls."

- LEED-NC Version 3 Reference Guide, page 530

(Complete descriptions of documentation requirements are on LEED-Online)

• "For individual workstation controls, provide a listing of the total number of individual workstations and lighting controls.
• For shared multi-occupant space control, provide a listing of the project's group multi-occupant spaces and a description of the installed lighting controls.
• Provide a narrative describing the project's lighting control strategy. Include data regarding the type and location of individual controls."

- LEED for New Construction Version 2.2 Reference Guide, page 363

"Provide the LEED Letter Template, signed by the architect or responsible party, demonstrating and declaring that controls for individual airflow, temperature and lighting are provided for at least 50% of the occupants in non-perimeter, regularly occupied areas."

- LEED-NC Version 2.1 Reference Guide, page 284.

"Design heating, ventilating and air conditioning (HVAC) systems and the building envelope to meet the requirements of ASHRAE Standard 55-2004, Thermal Comfort Conditions for Human Occupancy (with errata but without addenda1). Demonstrate design compliance in accordance with the Section 6.1.1 documentation."

- LEED 2009 for New Construction and Major Renovations Rating System, page 75

"Design HVAC systems and the building envelope to meet the requirements of ASHRAE Standard 55-2004, Thermal Comfort Conditions for Human Occupancy. Demonstrate design compliance in accordance with the Section 6.1.1 Documentation."

- LEED-NC Version 2.2 Reference Guide, page 365

"Comply with ASHRAE Standard 55-1992, Addenda 1995, for thermal comfort standards including humidity control within established ranges per climate zone. For naturally ventilated buildings, utilize the adaptive comfort temperature boundaries, using the 90% acceptability limits as defined in the Collaborative for High Performance Schools (CHPS) Best Practices Manual, Appendix C – A Field Based Thermal Comfort Standard for Naturally Ventilated Buildings, Figure 2."

- LEED-NC Version 2.1 Reference Guide, page 293

• "Document the owner's project requirements. This should indicate the intended comfort criteria for the building and state assumptions regarding activity level and occupant clothing.
• Summarize operational procedures for building systems, including building controls and other environmental control systems. Teams should also include general information, seasonal set point recommendations, changeover schedules, maintenance and operation instructions, and a maintenance and inspection schedule.
• Document the mechanical designer's basis of design; include design assumptions, including diversity considerations, and HVAC load calculations.
• Maintain documentation (e.g., design plans, lists) of all registers and terminal units that includes the type and flow, or radiant value. Additionally, include any elements that significantly affect thermal comfort, indication of spaces outside comfort-controlled areas, and locations of all occupant-adjustable controls."

- LEED-NC Version 3 Reference Guide, page 539

(Complete descriptions of documentation requirements are on LEED-Online)

• "Provide data regarding seasonal temperature and humidity design criteria.
• Provide a narrative describing the method used to establish the thermal comfort conditions for the project and how the systems design addresses the design criteria. Include specific information regarding compliance with the referenced standard."

- LEED-NC Version 2.2 Reference Guide, page 367

• "For mechanically ventilated spaces: provide the LEED Letter Template, signed by the engineer or responsible party, declaring that the project complies with ASHRAE Standard 55-1992, Addenda 1995. Include a table that identifies each thermally controlled zone, and that summarizes for each zone the temperature and humidity control ranges and the method of control used.

OR

• For naturally ventilated spaces: provide the LEED Letter Template, signed by the engineer or responsible party declaring that the project complies with the 90% acceptability limits of the adaptive comfort temperature boundaries in the Collaborative for High Performance Schools (CHPS) Best Practices Manual Appendix C – A Field Based Thermal Comfort Standard for Naturally Ventilated Buildings, Figure 2."

- LEED-NC Version 2.1 Reference Guide, page 293

"Achieve IEQ Credit 7.1: Thermal Comfort—Design

Provide a permanent monitoring system to ensure that building performance meets the desired comfort criteria as determined by IEQ Credit 7.1: Thermal Comfort—Design.

Agree to conduct a thermal comfort survey of building occupants within 6 to 18 months after occupancy. This survey should collect anonymous responses about thermal comfort in the building, including an assessment of overall satisfaction with thermal performance and identification of thermal comfort-related problems. Agree to develop a plan for corrective action if the survey results indicate that more than 20% of occupants are dissatisfied with thermal comfort in the building. This plan should include measurement of relevant environmental variables in problem areas in accordance with ASHRAE Standard 55-2004 (with errata but without addenda¹).

Residential projects are not eligible for this credit.

¹ Project teams wishing to use ASHRAE approved addenda for the purposes of this credit may do so at their discretion. Addenda must be applied consistently across all LEED credits."

- LEED 2009 for New Construction and Major Renovations Rating System, page 76

"Agree to implement a thermal comfort survey of building occupants within a period of six to 18 months after occupancy. This survey should collect anonymous responses about thermal comfort in the building including an assessment of overall satisfaction with thermal performance and identification of thermal comfort-related problems. Agree to develop a plan for corrective action if the survey results indicate that more than 20% of occupants are dissatisfied with thermal comfort in the building. This plan should include measurement of relevant environmental variables in problem areas in accordance with ASHRAE Standard 55-2004."

- LEED-NC Version 2.2 Reference Guide, page 369

"Install a permanent temperature and humidity monitoring system configured to provide operators control over thermal comfort performance and the effectiveness of humidification and/or dehumidification systems in the building."

- LEED-NC Version 2.1 Reference Guide, page 294

• "Create a written plan for corrective action if 20% or more of building occupants are dissatisfied with thermal comfort in the building.
• Create a thermal comfort survey to administer to building occupants."

- LEED-NC Version 3 Reference Guide, page 546

(Complete descriptions of documentation requirements are on LEED-Online)

"Provide a narrative describing the survey planned for the validation of the thermal comfort conditions for the project. Include a specific description of the provisions for creating a plan for corrective action."

- LEED-NC Version 2.2 Reference Guide, page 371

"Provide the LEED Letter Template, signed by the engineer or responsible party, declaring that a permanent temperature and humidity monitoring system will operate throughout all seasons to permit control of the building zones within the seasonal thermal comfort ranges defined in ASHRAE 55-1992, Addenda 1995. Confirm that the temperature and humidity controls were (or will be) tested as part of the scope of work for Energy and Atmosphere Prerequisite 1, Fundamental Building Systems Commissioning. Include the document name and section number where the commissioning work is listed."

-LEED-NC Version 2.1 Reference Guide, page 294

"Through 1 of the 4 options, achieve daylighting in at least the following spaces:

OPTION 1. Simulation
Demonstrate through computer simulations that 75% or more of all regularly occupied spaces areas achieve daylight illuminance levels of a minimum of 25 footcandles (fc) and a maximum of 500 fc in a clear sky condition on September 21 at 9 a.m. and 3 p.m. Areas with illuminance levels below or above the range do not comply. However, designs that incorporate view-preserving automated shades for glare control may demonstrate compliance for only the minimum 25 fc illuminance level.

OR

OPTION 2. Prescriptive
Use a combination of side-lighting and/or top-lighting to achieve a total daylighting zone (the floor area meeting the following requirements) that is at least 75% of all the regularly occupied spaces.

For the Side-lighting Daylight Zone (see diagram below):

• 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. The window area included in the calculation must be at least 30 inches above the floor.
  

  0.150 < VLT X WFR < 0.180

• The ceiling must not obstruct a line in section that joins the window-head to a line on the floor that is parallel to the plane of the window; Is twice the height of the window-head above the floor in, distance from the plane of the glass as measured perpendicular to the plane of the glass.
• Provide sunlight redirection and/or glare control devices to ensure daylight effectiveness.

For Top-lighting Daylight Zone (see diagram above):

• The daylight zone under a skylight is the outline of the opening beneath the skylight, plus in each direction the lesser of:
  * 70% of the ceiling height,
  OR
  * 1/2 the distance to the edge of the nearest skylight,
  OR
  * The distance to any permanent opaque partition (if transparent show VLT) farther than 70% of the distance between the top of the partitioon and the ceiling.
  
• Achieve skylight roof coverage between 3% and 6% of the roof area with a minimum 0.5 VLT.
• The distance between the skylights must not be more than 1.4 times the ceiling height.
• A skylight diffuser, if used, must have a measured haze value of greater than 90% when tested according to ASTM D1003. Avoid direct line of sight to the skylight diffuser.

Exceptions for areas where tasks would be hindered by the use of daylight will be considered on their merits.

OR

OPTION 3. Measurement

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

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

For all projects pursuing this option, provide daylight redirection and/or glare control devices to avoid highcontrast situations that could impede visual tasks. Exceptions for areas where tasks would be hindered by daylight will be considered on their merits.

OR

OPTION 4. Combination

Any of the above calculation methods may be combined to document the minimum daylight illumination in at least 75% of all regularly occupied spaces. The different methods used in each space must be clearly recorded on all building plans.

In all cases, only the square footage associated with the portions of rooms or spaces meeting the requirements may be applied toward the 75% of total area calculation required to qualify for this credit.

In all cases, provide 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."

- LEED 2009 for New Construction and Major Renovations Rating System, page 78-79

"OPTION 1 — CALCULATION
Achieve a minimum glazing factor of 2% in a minimum of 75% of all regularly occupied areas. The glazing factor is calculated as follows: Glazing Window Area [SF] Window Actual Tvis Window Factor = Floor Area [SF] x Geometry Factor x Minimum Tvis x Height Factor.

OR

OPTION 2 — SIMULATION
Demonstrate, through computer simulation, that a minimum daylight illumination level of 25 footcandles has been achieved in a minimum of 75% of all regularly occupied areas. Modeling must demonstrate 25 horizontal footcandles under clear sky conditions, at noon, on the equinox, at 30 inches above the floor.

OR

OPTION 3 — MEASUREMENT
Demonstrate, through records of indoor light measurements, that a minimum daylight illumination level of 25 footcandles has been achieved in at least 75% 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. 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 75% of total area calculation required to qualify for this credit."

- LEED-NC Reference Guide Version 2.2, page 373

“Achieve a minimum Daylight Factor of 29% (excluding all direct sunlight penetration) in 75% of all space occupied for critical visual tasks. Spaces excluded from this requirement include copy rooms, storage areas, mechanical plant rooms, laundry and other low occupancy support areas. Other exceptions for spaces where tasks would be hindered by the use of daylight will be considered on their merits."

- LEED- NC Version 2.1 Reference Guide, page 301

• "Develop documentation --such as floor plans, sections, and elevations --showing the glare control methods used on the project.
• Maintain documentation --such as floor plans, sections, and elevations --showing the location of regularly occupied spaces with a qualifying amount of daylight.
• To account for changes in design, develop a spreadsheet documenting the daylight factors outlined in the Calculations section.
• If using daylight simulation, update the computer model as the design progresses."

- LEED-NC Version 3 Reference Guide, page 560

(Complete descriptions of documentation requirements are on LEED-Online)

"Glazing Factor Calculation Method:

Complete the template calculation spreadsheet to demonstrate overall Glazing Factor. The following data is required for input in the template: occupied space area (sq. ft.); area of each type of glazing (sidelighting and toplighting); visible light transmittance (Tvis) for each glazing type.

OR

Computer Simulation Method:

• Complete the template calculation spreadsheet to demonstrate that the project complies with the minimum illumination levels. The following data is required for input in the template: total regularly occupied space area that achieves a simulated minimum of 25 footcandles.
• Provide copies of the applicable project drawings showing the illumination simulation results.

OR

Daylight Measurement Method:

• Complete the template calculation spreadsheet to demonstrate overall Glazing Factor. The following data is required for input in the template: total regularly occupied space area that achieves a measured minimum of 25 footcandles.
• Provide copies of the applicable project drawings showing the illumination simulation results.
• Provide a narrative describing any special occupancy areas that have been excluded from compliance. The narrative should include a detailed description of the space function and an explanation as to why the inclusion of views would hinder the normal tasks/function of each excluded area.

or projects that have used computer simulation or physical measurements, please include detailed information describing the method used to determine the daylighting contributions in the building. Include specific information regarding the actual or simulated time of day and weather conditions, measurement equipment or software used, and the calculation method for determining the final daylighting area."

- LEED- NC version 2.1 Reference Guide, page 379

"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 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. For multi-occupant spaces, the actual square footage with a direct line of sight to perimeter vision glazing is counted."

- LEED 2009 for New Construction and Major Renovations Rating System, page 81

"Achieve direct line of sight to the outdoor environment via vision glazing between 2'6" and 7'6" above finish floor 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 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 multi-occupant spaces, the actual square footage with direct line of sight to perimeter vision glazing is counted."

-LEED-NC Version 2.2 Reference Guide, page 383

“Achieve direct line of sight to vision glazing for building occupants in 90% of all regularly occupied spaces. Examples of exceptions include copy rooms, storage areas, mechanical, laundry and other low occupancy support areas. Other exceptions will be considered on their merits."

- LEED-NC Version 2.1 Reference Guide page 302

• "Maintain documentation --floor plans, sections, and elevations --showing the location of regularly occupied spaces with views.
• Maintain a spreadsheet documenting the view area as outlined in the Calculations section to account for any changes in design."

- LEED-NC Version 3 Reference Guide, page 569

(Complete descriptions of documentation requirements are on LEED-Online)

• "Complete the template calculation spreadsheet to demonstrate overall access to views from occupied spaces. The following data is required for input into the template: occupied space area (sq. ft.) and area (sq. ft.) of each occupied space with direct access to views.
• Provide copies of the applicable project drawings showing the line of sight from interior spaces through exterior windows in both plan and sectional views.
• Provide a narrative describing any special occupancy areas that have been excluded from compliance. The narrative should include a detailed description of the space function and an explanation as to why the inclusion of views would hinder the normal tasks/function of each excluded area."

- LEED-NC Version 2.2 Reference Guide, page 386

“Provide the LEED Letter Template and calculations describing, demonstrating and declaring that the building occupants in 90% of regularly occupied spaces will have direct lines of site to perimeter glazing. Provide drawings highlighting the direct line of sight zones signed by the architect or responsible party. Provide area calculations that define the daylight zone and provide prediction calculations or daylight simulation.”

--USGBC LEED-NC Version 2.1 Reference Guide page 302