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" "100001119" "2011-11-01" "Existing Buildings" "IEQc2.2: Controllability of Systems: Lighting" "None" "None" "Green Building Operations and Maintenance, 2009 edition $ Green Building Operations and Maintenance, 2009 edition, updated April 2010 " "BO+M RG: 402" "Definitions" "In alphabetical order, add the following definition for multi-occupant spaces, ""Multi-Occupant Spaces are places of egress, congregation, or where occupants pursue overlapping or collaborative tasks. Multi occupant spaces may be regularly or non-regularly occupied spaces.""\n" "Reference Guide Correction" "100001124" "2011-11-01" "Existing Buildings" "IEQc2.2: Controllability of Systems: Lighting" "None" "None" "Green Building Operations and Maintenance, 2009 edition $ Green Building Operations and Maintenance, 2009 edition, updated April 2010 " "BO+M RG: 402" "Definitions" "Revise the definition for individual occupant spaces to be, ""In individual occupant spaces, occupants perform distinct tasks from one another. Such spaces may be contained within multi-occupant spaces and should be treated separately where possible. Individual occupant spaces may be regularly or non-regularly occupied spaces.""\n" "LEED Interpretation" "2219" "2008-08-13" "New Construction, Existing Buildings, Commercial Interiors, Schools - New Construction" "IEQc6.1: Controllability of Systems-Lighting" "For a new 312,000 sf building seeking both LEED CS and LEED CI certifications we plan to comply with the requirements of LEED CI EQ Cr 6.1 to provide lighting controls for both individual and group occupants. We believe however that providing task lights for approximately 1800 employees in workstations when they may not be needed contradicts our sustainability goals. These fixtures, if not needed, only add to the project\'s overall embodied energy and environmental impact. The design team has been very aggressive in providing a task oriented lighting scheme that is efficient and beautiful. The design places direct/indirect fixtures with a large percentage of down light directly over the primary work surfaces to provide optimal foot-candles where they are needed. Of the 1870 employees in the building, 97% of them will be in workstations with partitions at 42"". Because of the low partitions, the only option for providing lighting control is a movable task light. The owner has chosen an LED task light. In order to meet the projects overall sustainability goals while meeting the intent of the credit we propose surveying occupants prior to occupancy as to whether they will want a task light. Those who responded in the affirmative will have a task light upon occupancy. The owner will conduct a post occupancy survey to see if additional employees require a task light or don\'t need the one they have. At any point an employee will be able to request a task light. If 100% of employees request a task light the owner will provide them. Providing the task light as an option gives users the ability to control lighting levels while meeting the owner and LEED\'s overall sustainability goals. Please verify that surveying employees pre-and post-occupancy about task lighting preferences and then providing task lights only to employees in open office areas who desire them meets the requirements of LEED CI EQ Cr 6.1." "The inquiry is stating the following approach as an alternative compliance path to meet the requirements of EQc6.1: 1) Survey all future occupants in advance of occupancy to identify those who desire a task light then provide a light upon move-in, 2) Survey all occupants post-occupancy to identify any persons who desire a task light then provide a light, and 3) Commit to making task lights available to all employees who request them at anytime. A survey based approach will meet the requirements only if 90% or more of the respondents request a task light and are provided with the equipment. The described situation makes a very strong case for decreasing environmental impact in not requiring the potentially unnecessary acquisition of products that may not be used by building occupants. The project team should explore credits in other categories of LEED for this strategy, as the elements outlined above may help in achievement of other points. Please note that task-ambient lighting systems that provide low levels of ambient light supplemented with additional task lights have the ability to reduce energy, reduce environmental impact by avoiding installation of excessive ambient light fixtures that provide task illuminance. The intent of EQc6.1 is that the occupants be given individual control to change their light levels to suit their needs. A survey based approach makes the user aware of their needs at the time of the survey only, it does not give them control over their lights unless they respond in the survey that they need a tasklight.\n **Update October 1, 2013: Applicable credits have been updated." "None" "None" "X" "LEED Interpretation" "2310" "2008-09-23" "New Construction, Existing Buildings, Commercial Interiors, Core and Shell" "IEQc6.1: Controllability of Systems-Lighting" "Our project is a multifamily residential building and we would like to verify our approach in meeting the requirements of credit EQ C6.1. Based on the CIR ruling dated 1/29/2008, by providing on/off controls for fixed lighting installed in spaces for individual use (kitchens, bedrooms) and shared multi-occupant spaces, this credit can be achieved. However, it is not clear if providing switched wall receptacles is an acceptable control measure for spaces with no fixed (permanent) lighting installed and hence our query. Our approach to the credit is outlined below 1) For the residential unit bedrooms, kitchen and dining rooms, fixed lighting will be installed, serving the needs of those spaces. On/off controls for the light fixtures will be provided. 2) In addition, the bedrooms will also have switched wall receptacles for the convenience of the tenants individual lighting needs. 3) The living rooms will not have any fixed lighting installed. A switched wall receptacle, allowing the tenant to choose their own light fixture, gives the tenant controllability of the light with an on/off switch. We believe that the intent of the credit to provide \'controllability\' of light is met, even if the actual light fixture is not permanently installed. 4) The living room will also have a junction box for a future fan or ceiling light, at the discretion of the tenant with a separate wall switch to control the fan and light independently. 5) The clubhouse area which can be regarded as a shared multi-occupant space will have occupancy sensors for lighting and also on/off switches for manual over ride. Please confirm that the above approach is acceptable." "The applicant is requesting clarification regarding the use of switched receptacles in residential applications to satisfy the credit requirements. The proposed approach appears to satisfy the credit intent. The LEED-NC v2.2 Reference Guide states that task lights do not need to be permanently wired and ideally allow the occupant to reposition the lighting fixture. This guidance is also applicable to group multi-occupant residential spaces. The living room, which is not equipped with fixed lighting, has been provided two separate controls: switched receptacles for non-fixed lighting fixtures and a junction box and lighting controls for a possible future fixture. The installation of switched receptacles provides occupants with another level of lighting control. In addition, all of the other spaces have been provided with fixed lighting that satisfies the requirements outlined in the 1/29/2008 CIR. When applying for this credit, the project team should also provide documentation to confirm that a sufficient number of lighting fixtures to provide the required space lighting have been connected to the proposed controls for group multi-occupant spaces.\n\n **Update October 1, 2013: Applicable credits have been updated." "5140" "None" "LEED Interpretation" "5138" "2008-09-15" "New Construction, Schools - New Construction, Commercial Interiors, Core and Shell, Existing Buildings" "IEQc6.1: Controllability of Systems-Lighting" "Our building has stacking glass walls on the south face of all floors. East walls of the first floor retail spaces have the same type of openings. The areas of these openings range from 90 sf to 400 sf when are they completely open. Where installed, these openings make up at least 75% of the entire wall area. We would like an equivalency for counting those areas toward the operable window requirement of IEQc6.1. We propose that the area of a standard window is 6 square feet. We request an allowance to account for 1 window for every 8 square feet of stacking glass. For example, a 90 sf stacking glass wall would equal 11.25 operable windows. Please confirm that this calculation method is acceptable." "The applicant is requesting an equivalency calculation between wall openings and operable windows. It is not clear from the description what types of openings are included in the ""stacking glass walls"". Typical retail spaces only have doors that may be held open when the climate is conducive to do so. If the only openings in the wall are primarily for entry and exit, the requested equivalency cannot be accepted. An operable window has a primary function to provide a user controllable and adjustable opening to maintain user required conditions in the space. A door does not have that type of primary function and does not qualify for the credit. Applicable Internationally." "None" "None" "X"