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) "Reference Guide Correction" "100001107" "2011-11-01" "New Construction, Schools - New Construction, Core and Shell, Healthcare, Retail - New Construction, Commercial Interiors, Retail - Commercial Interiors" "IEQc1: Outdoor Air Delivery/CO2 Monitoring" "None" "None" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010 $ Green Interior Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition, updated June 2011" "BD+C RG: 442
ID+C RG: 303" "Definitions" "In alphabetical order, add the following definition for nonoccupied spaces, ""Nonoccupied spaces are defined as spaces designed for equipment and machinery or storage with no human occupancy except for maintenance, repairs, and equipment retrieval.""\n" "Reference Guide Correction" "100001125" "2011-11-01" "New Construction, Schools - New Construction, Core and Shell, Healthcare, Retail - New Construction, Commercial Interiors, Retail - Commercial Interiors" "IEQc1: Outdoor Air Delivery/CO2 Monitoring" "None" "None" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010 $ Green Interior Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition, updated June 2011" "BD+C RG: 442
ID+C RG: 303" "Definitions" "Revise the definition for densely occupied spaces to be, ""Densely occupied spaces are areas with a design occupant density of 25 people or more per 1,000 square feet (40 square feet or less per person).""\n" "Rating System Correction" "100000833" "2011-02-02" "Healthcare" "IEQc1: Outdoor Air Delivery/CO2 Monitoring" "None" "None" "" "69" "Requirements" "Remove the first occurrence of ""to ensure""" "Reference Guide Correction" "100001090" "2011-11-01" "New Construction, Schools - New Construction, Core and Shell, Healthcare, Retail - New Construction, Commercial Interiors, Retail - Commercial Interiors" "IEQc1: Outdoor Air Delivery/CO2 Monitoring" "None" "None" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010 $ Green Interior Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition, updated June 2011" "BD+C RG: 442
ID+C RG: 303" "Definitions" "In alphabetical order, add the following definition for occupied spaces, ""Occupied Spaces are defined as enclosed spaces that can accommodate human activities. Occupied spaces are further classified as regularly occupied or non-regularly occupied spaces based on the duration of the occupancy, individual or multi-occupant based on the quantity of occupants, and densely or non-densely occupied spaces based upon the concentration of occupants in the space.""" "Reference Guide Correction" "100001100" "2011-11-01" "New Construction, Schools - New Construction, Core and Shell, Healthcare, Retail - New Construction, Commercial Interiors, Retail - Commercial Interiors" "IEQc1: Outdoor Air Delivery/CO2 Monitoring" "None" "None" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010 $ Green Interior Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition, updated June 2011" "BD+C RG: 442
ID+C RG: 303" "Definitions" "In alphabetical order, add the following definition for non-densely occupied space, ""Non-densely occupied spaces are areas with a design occupant density of less than 25 people per 1,000 square feet (40 square feet or more per person).""" "LEED Interpretation" "1701" "2007-03-15" "New Construction, Existing Buildings, Commercial Interiors, Core and Shell, Schools - New Construction" "IEQc1: Outdoor Air Delivery/CO2 Monitoring" "USGBC allows projects registered under LEED-NC v2.1 to use LEED-NC v2.2 credits. USGBC also decided after this initial decision that certain credits must be a group because they were logically linked together. In this case EQ Prerequisite 1, Credit 1 and Credit 2 are a linked group. Some LEED-NC v2.1 projects pursuing EQ Credit 1 that completed design before the credits were grouped together by the USGBC. This means that CO2 sensors were designed into the system and construction was completed before the credit grouping occurred. If CO2 sensors were installed for every mechanical ventilation system that monitor non-densely occupied spaces, and those sensors provide monitoring in the breathing zone as defined by LEED-NC v2.2 (3 feet to 6 feet above the floor), can the sensors be used to obtain credit under v2.2 in lieu of the required direct outdoor airflow measurement devices? In essence, can CO2 monitoring be used non-densely occupied spaces, so long as the sensors meet the requirements for densely occupied spaces? Approving an approach as described above would help prevent v2.1 projects, which determined long ago that they meet the requirements of v2.2 for EQ Prerequisite 1 and Credit 2 more effectively than the v2.1 requirements, from ripping out properly placed and operational CO2 sensors to install OA sensors simply because a grouping of credits occurred after a project was designed and constructed." "EQc1 in LEED-NCv2.2 requires air flow measurement devices in each mechanical ventilation system serving non-densely occupied areas. This requirement is to meet the intent of sustaining occupant comfort and well-being through ventilation system monitoring. Use of CO2 sensors in non-densely occupied spaces that meet the requirements for densely occupied spaces under LEED-NCv2.2, in lieu of direct outdoor airflow measurement, meet the intent of EQc1.\n\n **Update October 1, 2013: Applicable credits were updated. " "None" "None" "X"