Entry Type ID Date Applicable Rating System Primary Credit Inquiry (LIs) Ruling (LIs) Related Addenda/LIs Related Resources Campus Applicable Internationally Applicable Country Applicability Reference Guide (Addenda) Page (Addenda) Location (Addenda) Description of Change (Addenda) "Rating System Correction, Reference Guide Correction" "100000404" "2009-12-02" "New Construction, Schools - New Construction, Core and Shell" "None" "None" "Green Building Design and Construction, 2009 edition" " NC Rating System: 61, Schools Rating System: 64, CS Rating System: 61, Reference Guide: 443" "CASE 2" "In the first paragraph, remove the text ""Design natural ventilation systems for occupied spaces to meet the recommendations set forth in the Carbon Trust ""Good Practice Guide 237"" (1998).""" "Rating System Correction, Reference Guide Correction" "100000405" "2009-12-02" "New Construction, Schools - New Construction, Core and Shell" "None" "None" "Green Building Design and Construction, 2009 edition" " NC Rating System: 61, Schools Rating System: 64, CS Rating System: 61, Reference Guide: 443" "CASE 2" "In the fourth line of the paragraph, replace the text ""1.18"" with ""2.8.""" "Rating System Correction, Reference Guide Correction" "100000406" "2009-12-02" "New Construction, Schools - New Construction, Core and Shell" "None" "None" "Green Building Design and Construction, 2009 edition" " NC Rating System: 61, Schools Rating System: 64, CS Rating System: 61, Reference Guide: 443" "OPTION 1" "Replace the paragraph text with: \n\nShow that the natural ventilation systems design meets the\nrecommendations set forth in the CIBSE manuals appropriate to the project\nspace.\nPATH 1. CIBSE Applications Manual 10: 2005, Natural Ventilation in Nondomestic\nBuildings.\nPATH 2. CIBSE AM 13:2000, Mixed Mode Ventilation." "Reference Guide Correction" "100000407" "2010-04-14" "New Construction, Schools - New Construction, Core and Shell" "None" "None" "Green Building Design and Construction, 2009 edition" "451" "13. Definitions, Breathing zone" "Replace the text with ""Breathing zone is the region within an occupied\nspace between 3 and 6 feet above the floor. Note that this definition\nvaries from that of ASHRAE 62.1-2007, which states that the breathing\nzone is between 3 inches and 6 feet from the floor, and 2 feet from the\nwalls as well as fixed air conditioning equipment.""" "Rating System Correction, Reference Guide Correction" "100000117" "2009-12-02" "Commercial Interiors" "None" "None" "Green Interior Design and Construction, 2009 edition" "Rating System: 41, Reference Guide: 305" "CASE 2" "In the first paragraph, remove the text ""Design natural ventilation systems for occupied spaces to meet the recommendations set forth in the Carbon Trust ""Good Practice Guide 237"" (1998).""" "Rating System Correction, Reference Guide Correction" "100000118" "2009-12-02" "Commercial Interiors" "None" "None" "Green Interior Design and Construction, 2009 edition" "Rating System: 41, Reference Guide: 305" "OPTION 1" "Remove the text in the paragraph and insert:\n\nShow that the natural ventilation systems design meets the\nrecommendations set forth in the CIBSE manuals appropriate to the\nproject space.\nPATH 1. CIBSE Applications Manual 10: 2005, Natural Ventilation in\nNon-domestic Buildings.\nPATH 2. CIBSE AM 13:2000, Mixed Mode Ventilation" "Rating System Correction, Reference Guide Correction" "100000119" "2010-01-28" "Commercial Interiors" "None" "None" "Green Interior Design and Construction, 2009 edition" "Rating System: 41, Reference Guide: 305" "CASE 2" "In the fourth line of the paragraph, replace the text ""1.18"" with ""2.8.""" "Reference Guide Correction" "100000120" "2009-12-02" "Commercial Interiors" "None" "None" "Green Interior Design and Construction, 2009 edition" "307" "The Carbon Trust Good Practice Guide 237" "Remove the entire section labeled ""The Carbon Trust Good Practice Guide 237""" "Reference Guide Correction" "100000121" "2009-11-02" "Commercial Interiors" "None" "None" "Green Interior Design and Construction, 2009 edition" "308" "Mechanically Ventilated Spaces" "In the third line of the first paragraph, remove the comma before the end of the period at the end of sentence" "Reference Guide Correction" "100000122" "2009-11-02" "Commercial Interiors" "None" "None" "Green Interior Design and Construction, 2009 edition" "308" "Mechanically Ventilated Spaces" "In the third line of the first paragraph, insert the word ""is"" between ""procedure"" and ""easier"" so the text becomes ""...rate procedure is easier to...""" "Reference Guide Correction" "100000123" "2009-11-02" "Commercial Interiors" "None" "None" "Green Interior Design and Construction, 2009 edition" "309" "Naturally Ventilated Spaces" "In the first line of the second paragraph, replace the word ""hrough"" with ""through"" so the text becomes ""...flow rates through each...""" "Reference Guide Correction" "100000124" "2010-04-14" "Commercial Interiors" "None" "None" "Green Interior Design and Construction, 2009 edition" "312" "13. Definitions, Breathing zone" "Replace the text with ""Breathing zone is the region within an occupied\nspace between 3 and 6 feet above the floor. Note that this definition\nvaries from that of ASHRAE 62.1-2007, which states that the breathing\nzone is between 3 inches and 6 feet from the floor, and 2 feet from the\nwalls as well as fixed air conditioning equipment.""" "Global ACP" "100001292" "2012-07-06" "New Construction, Core and Shell, Schools - New Construction" "None" "None" "X" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010" "NC, CS RS: 69, Schools RS 76" "Case 2, Option 2" "In the first sentence, replace ""Chapter"" with ""section"" after ""ASHRAE Standard 62.1-2007""" "Global ACP" "100001293" "2012-07-06" "New Construction, Core and Shell, Schools - New Construction" "None" "None" "X" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010" "NC, CS RS: 69, Schools RS 76" "Case 2, Option 2" "Add the following sentence to the end of the paragraph: ""Projects outside the U.S. may use Annex B of Comit" "Global ACP" "100001294" "2012-07-06" "New Construction, Core and Shell, Schools - New Construction" "None" "None" "X" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010" "NC, CS RS: 70, Schools RS 77" "Requirements" "Delete the Alternative Compliance Path for Projects Outside the U.S." "Global ACP" "100001535" "2012-10-01" "Commercial Interiors, Retail - Commercial Interiors" "None" "None" "X" "Green Interior Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition, updated June 2011 $ Retail Supplement to Green Interior Design and Construction, 2009 edition" "CI RS 41, Retail CI RS 39" "Case 1" "Add ""OPTION 1. ASHRAE Standard 62.1-2007 or Non-U.S. Equivalent"" directly under ""CASE 1. Mechanically Ventilated Spaces""" "Global ACP" "100001537" "2012-10-01" "Retail - New Construction, Commercial Interiors, Retail - Commercial Interiors" "None" "None" "X" "Green Interior Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition, updated June 2011 $ Retail Supplement to Green Interior Design and Construction, 2009 edition $ Retail Supplement to Green Building Design and Con" "CI RS 41, Retail CI RS 39, Retail NC 58" "Case 1" "Add the following after the first paragraph: ""OR OPTION 2. CEN Standard EN 15251: 2007 Projects outside the U.S. may earn this credit by increasing breathing zone outdoor air ventilation rates to all occupied spaces by at least 30% above the minimum rates required by Annex B of Comit" "Global ACP" "100001541" "2012-10-01" "Retail - New Construction, Commercial Interiors, Retail - Commercial Interiors" "None" "None" "X" "Green Interior Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition, updated June 2011 $ Retail Supplement to Green Interior Design and Construction, 2009 edition $ Retail Supplement to Green Building Design and Con" "CI RS 41, Retail CI RS 39, Retail NC 58" "Case 2, Option 2" "Add ""Airflow Model"" to the ""Option 2"" heading." "Global ACP" "100001542" "2012-10-01" "Retail - New Construction, Commercial Interiors, Retail - Commercial Interiors" "None" "None" "X" "Green Interior Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition, updated June 2011 $ Retail Supplement to Green Interior Design and Construction, 2009 edition $ Retail Supplement to Green Building Design and Con" "CI RS 41, Retail CI RS 39, Retail NC 58" "Case 2, Option 2" "In the first paragraph, replace ""Chapter 6"" with ""section 6""" "Global ACP" "100001536" "2012-10-01" "Retail - New Construction, Commercial Interiors, Retail - Commercial Interiors" "None" "None" "X" "Green Interior Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition, updated June 2011 $ Retail Supplement to Green Interior Design and Construction, 2009 edition $ Retail Supplement to Green Building Design and Con" "CI RS 41, Retail CI RS 39, Retail NC 58" "Case 1" "Add ""Projects outside the U.S. may use a local equivalent to ASHRAE Standard 62.1-2007, if the same is used for IEQ Prerequisite 1: Minimum Indoor Air Quality Performance."" to the end of the first paragraph." "Rating System Correction" "100001538" "2012-10-01" "Retail - New Construction, Commercial Interiors, Retail - Commercial Interiors" "None" "None" "Green Interior Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition, updated June 2011 $ Retail Supplement to Green Interior Design and Construction, 2009 edition $ Retail Supplement to Green Building Design and Con" "CI RS 41, Retail CI RS 39, Retail NC 58" "Case 2, Option 1" "Add ""CIBSE or Non-U.S. Equivalent"" to the ""Option 1"" heading." "Rating System Correction" "100001539" "2012-10-01" "Retail - New Construction, Commercial Interiors, Retail - Commercial Interiors" "None" "None" "Green Interior Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition, updated June 2011 $ Retail Supplement to Green Interior Design and Construction, 2009 edition $ Retail Supplement to Green Building Design and Con" "CI RS 41, Retail CI RS 39, Retail NC 58" "Case 2, Option 1" "Path 1 should read: ""Use CIBSE Applications Manual 10: 2005, Natural Ventilation in Non-domestic Buildings. Projects outside the U.S. may use a local equivalent.""" "Global ACP" "100001540" "2012-10-01" "Retail - New Construction, Commercial Interiors, Retail - Commercial Interiors" "None" "None" "X" "Green Interior Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition, updated June 2011 $ Retail Supplement to Green Interior Design and Construction, 2009 edition $ Retail Supplement to Green Building Design and Con" "CI RS 41, Retail CI RS 39, Retail NC 58" "Case 2, Option 1" "Path 2 should read: ""Use CIBSE AM 13:2000, Mixed Mode Ventilation. Projects outside the U.S. may use a local equivalent.""" "Global ACP" "100001543" "2012-10-01" "Retail - New Construction, Commercial Interiors, Retail - Commercial Interiors" "None" "None" "X" "Green Interior Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition, updated June 2011 $ Retail Supplement to Green Interior Design and Construction, 2009 edition $ Retail Supplement to Green Building Design and Con" "CI RS 41, Retail CI RS 39, Retail NC 58" "Case 2, Option 2" "Add the following to the end of the option: ""Projects outside the U.S. may use Annex B of Comit" "Global ACP" "100001284" "2012-07-06" "New Construction, Core and Shell, Schools - New Construction" "None" "None" "X" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010" "NC, CS RS: 69, Schools RS 76" "Case 1" "Add the following title immediately following Case 1: ""OPTION 1. ASHRAE Standard 62.1-2007 or Non-U.S. Equivalent""" "Global ACP" "100001285" "2012-07-06" "New Construction, Core and Shell, Schools - New Construction" "None" "None" "X" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010" "NC, CS RS: 69, Schools RS 76" "Case 1, Option 1" "Add the following sentence to the end of the paragraph: ""Projects outside the U.S. may use a local equivalent to ASHRAE Standard 62.1-2007 if the same is used for IEQ Prerequisite 1: Minimum Indoor Air Quality Performance.""" "Global ACP" "100001286" "2012-07-06" "New Construction, Core and Shell, Schools - New Construction" "None" "None" "X" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010" "NC, CS RS: 69, Schools RS 76" "Case 1" "Add the following title after Case 1, Option 1: ""OPTION 2. CEN Standards EN 15251: 2007 and EN 13779: 2007""" "Global ACP" "100001287" "2012-07-06" "New Construction, Core and Shell, Schools - New Construction" "None" "None" "X" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010" "NC, CS RS: 69, Schools RS 76" "Case 1, Option 2" "Add the following paragraph: ""Projects outside the U.S. may earn this credit by increasing breathing zone outdoor air ventilation rates to all occupied spaces by at least 30% above the minimum rates required by Annex B of Comit" "Global ACP" "100001288" "2012-07-06" "New Construction, Core and Shell, Schools - New Construction" "None" "None" "X" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010" "NC, CS RS: 69, Schools RS 76" "Case 2, Option 1" "Option 1 should be titled: ""OPTION 1. CIBSE or Non-U.S. Equivalent""" "Global ACP" "100001289" "2012-07-06" "New Construction, Core and Shell, Schools - New Construction" "None" "None" "X" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010" "NC, CS RS: 69, Schools RS 76" "Case 2, Option 1" "Path 1 should read: ""PATH 1. Use CIBSE Applications Manual 10: 2005, Natural Ventilation in Non-domestic Buildings. Projects outside the U.S. may use a local equivalent.""" "Global ACP" "100001290" "2012-07-06" "New Construction, Core and Shell, Schools - New Construction" "None" "None" "X" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010" "NC, CS RS: 69, Schools RS 76" "Case 2, Option 1" "Path 2 should read: ""PATH 2. Use CIBSE AM 13:2000, Mixed Mode Ventilation. Projects outside the U.S. may use a local equivalent."" " "Global ACP" "100001291" "2012-07-06" "New Construction, Core and Shell, Schools - New Construction" "None" "None" "X" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010" "NC, CS RS: 69, Schools RS 76" "Case 2, Option 2" "Option 2 should read: ""OPTION 2. Airflow Model""" "LEED Interpretation" "2457" "2009-03-02" "New Construction, Existing Buildings, Commercial Interiors, Core and Shell" "Background: The project is a multi-building complex on a military reservation that includes 256,000 square feet of buildings. Included in this total are two office buildings totaling approximately 160,000 square feet, two vehicle maintenance facilities that total approximately 61,000 square feet and four warehouses that total approximately 36,000 square feet. The protocol used in conjunction with the LEED V2.2 Rating System is the LEED-NC Application Guide for Multiple Buildings and On-Campus Building Projects. Issue: This CIR relates to the vehicle maintenance building. Employing the Ventilation Rate Procedure (as opposed to the Indoor Air Quality Procedure) for a facility classed as a ""repair garage"" in ASHRAE 62.1-2004 appears to result in unnecessarily large ventilation requirements. The energy use for the resulting continuous ventilation is significant, and does not appear to be justified based on the results achieved. Discussion: The ASHRAE 62.1 ventilation rate procedure for a ""repair garage"" requires 1.5 CFM per square foot. To achieve a 30% increase in ventilation, the airflow would be 1.95 CFM per square foot. Based on calculated occupancy, this results in between about 390 to 500 cfm/person. Additionally, each repair bay is equipped with a vehicle exhaust pickup (1,400 CFM each) and its own large individual overhead door. The space is heated to 55 degrees with radiant heaters. Each maintenance area is designed for a single-zone 100% outside air system. Operational data for four similar vehicle maintenance facilities at the same reservation was collected. Four years of operational history are available. The outside air ambient condition at these facilities is the same as the proposed installation. The existing facilities are equipped with a full energy management system that permits monitoring of fan run time and indoor air quality (CO and CO2) data. The area ventilation fans for these facilities activate when high CO or CO2 was measured. The measured conditions for the three facilities with occupancy similar to the proposed facility showed CO and CO2 levels were at or near outside air ambient conditions over 95% of the time. The CO levels never exceeded 5 PPM, the CO2 levels never exceeded 800 PPM. The data from these existing facilities indicates that continuous ventilation of 1.5 CFM per square foot or higher would not provide a significant improvement in indoor air quality over demand-controlled (intermittent) ventilation. LEED requires documentation for the increased ventilation credit to be prepared using the ventilation rate procedure in accordance with ASHRAE 62.1-2004. Because the similar building performance data is available, we propose to provide documentation for this project in accordance with the ""indoor air quality procedure"", also in compliance with ASHRAE 62.1-2004, documented IAW paragraph 6.3.2, ""Documentation"", as follows: "".If the design is based on an approach that has proved successful for similar buildings, the documentation shall include the basis for concluding that the design approach was successful."" . This is addressed in the LEED V2.2 Reference Guide but not used because it is somewhat more problematic to document. Providing control to a reduced level of contaminants would produce exceptional air quality for these maintenance bays and fulfill the intent of increased ventilation, while providing reduced energy use and less embodied energy in construction materials. It is also the standard of practice for maintenance facilities. Request: Document increased ventilation in accordance with ASHRAE 62.1-2004, ""Indoor Air Quality Procedure"". Provide increased ventilation via demand-controlled (intermittent) ventilation systems with DDC controls similar to the existing facilities for control of CO2 to 800 PPM and CO to 12 PPM. Both of these concentrations are at least 30% less than conventional criteria, and far less than regulatory levels defined in ASHRAE 62.1." "There are two questions raised by this CIR: 1. Can ventilation rates be determined using the Indoor Air Quality Procedure instead of the Ventilation Rate Procedure in Standard 62.1? No. As stated in EQ Prerequisite 1, the Ventilation Rate Procedure must be used to size the ventilation system. Hence for ""auto repair rooms,"" the exhaust rate must be 1.5 CFM per square foot per Table 6-4. However, demand controlled ventilation using CO concentration may be used to modulate the exhaust rate down when CO levels are low. (See Appendix B in Standard 62.1 for guidelines of maximum CO concentration.) 2. Does the exhaust rate in the auto repair room have to be increased by 30% to meet EQ Credit 2? No. This credit requires that breathing zone ventilation rates required by Standard 62.1 be increased by at least 30%. Breathing zone rates are listed in Table 6-1, so it is those rates that must be increased by 30%. The exhaust rates in Table 6-4 need not be increased to achieve this credit.\n\nUpdate April 15, 2011: Please note that all 2009 projects in multiple building situations must follow the 2010 Application Guide for Multiple Buildings and On-Campus Building Projects, located here: https://www.usgbc.org/ShowFile.aspx?DocumentID=7987. 2009 project teams should check this document for up to date guidance on all multiple building issues. " "None" "None"