Billings, Millea, Victorsson | LEED-NC Analysis: New GSB Campus | Page 1 Indoor Environmental Quality: 15 possible points Overview Goals Today’s society is centered on work and other activities that primarily take place inside. Much attention and research has been given to the quality of the indoor environment, particularly when it comes to occupants’ health and comfort. Whether it is related to thermal comfort, reduction of particulate matter in the air, or overall reduction in odors, indoor air quality has a great effect on the overall long-term success of a structure. LEED-NC focuses a large portion of its rating system on establishing and maintaining methods and practices to create a suitable indoor environment for building occupants. It states that, “a green building should provide its occupants with superior indoor air quality to support their health, comfort and well-being. A key component for maintaining superior indoor air quality is providing adequate ventilation rates. Underventilated buildings may be stuffy, odorous, uncomfortable and/or unhealthy for occupants.”1 Additionally, LEED-NC outlines goals for thermal comfort, lighting and views, and reduction in harmful emissions from building materials. Methods At this point in the design scheme for the new Graduate School of Business, a final design has not been reached. For this reason, most of the credits outlined in Indoor Environmental Quality cannot be verified at this point in time. For example, some of the exact building materials have not been selected for the interior of the building. Carpets, paints, and adhesives, for example, will not likely be selected until further along in the design process. Because of this situation, it is assumed that recommendations made by involved parties (such as the Sustainability Task Force) will be included in the final design, thus credits are awarded on this basis. Much of the document review process included recommendations or mentioning of possible use of particular materials or methods in the final design. Wherever such information was found, credits were generally awarded. Some features were not mentioned in the available documentation, such as a construction plan, and thus these credits were not awarded. Overall, is it believed that indoor environmental quality is of utmost importance to both designers and occupants of the new Graduate School of Business. Therefore, it is believed that the design team will pursue most, if not all, of the possible credits included in this segment of the LEED-NC rating system. 1 LEED-NC Version 2.2 Reference Guide, pages 308-309Billings, Millea, Victorsson | LEED-NC Analysis: New GSB Campus | Page 2 Indoor Environmental Quality: 15 possible points LEED-NC Scorecard LEED for New Construction v2.2 Registered Project ChecklistProject Name: Stanford GSB: Knight Management CenterProject Address: Stanford, CA Yes ? No 12 3 0 Indoor Environmental Quality 15 Points Y Prereq 1 Minimum IAQ Performance Required Y Prereq 2 Environmental Tobacco Smoke (ETS) Control Required 1 Credit 1 Outdoor Air Delivery Monitoring 1 1 Credit 2 Increased Ventilation 1 1 Credit 3.1 Construction IAQ Management Plan, During Construction 1 1 Credit 3.2 Construction IAQ Management Plan, Before Occupancy 1 1 Credit 4.1 Low-Emitting Materials, Adhesives & Sealants 1 1 Credit 4.2 Low-Emitting Materials, Paints & Coatings 1 1 Credit 4.3 Low-Emitting Materials, Carpet Systems 1 1 Credit 4.4 Low-Emitting Materials, Composite Wood & Agrifiber Products 1 1 Credit 5 Indoor Chemical & Pollutant Source Control 1 1 Credit 6.1 Controllability of Systems, Lighting 1 1 Credit 6.2 Controllability of Systems, Thermal Comfort 1 1 Credit 7.1 Thermal Comfort, Design 1 1 Credit 7.2 Thermal Comfort, Verification 1 1 Credit 8.1 Daylight & Views, Daylight 75% of Spaces 1 1 Credit 8.2 Daylight & Views, Views for 90% of Spaces 1Billings, Millea, Victorsson | LEED-NC Analysis: New GSB Campus | Page 3 EQ Prerequisite 1: Minimum IAQ Performance LEED-NC Credit: YES | UNSURE | NO Prerequisite Intent Develop indoor air quality (IAQ) performance requirements in order to enhance the air quality within the building, thus increasing comfort and wellbeing of the inhabitants. To illustrate this prerequisite, steps will be discussed that were taken in the design of the ventilation system and the topics that were seen as most important. Feasibility This prerequisite must be achieved to receive LEED-NC certification, therefore it is considered fulfilled. Specific requirements are outlined by LEED-NC. These include requirements established in ASHRAE 62.1.2004 for the mechanical ventilation system in Sections 4 through 7, and for natural ventilation in Paragraph 5.1. Analysis This prerequisite will be met by following the standards in ASHRAE to fulfill the health and comfort needs of the building inhabitants. The overall GSB environment is one that requires acceptable working conditions that demand high performance of the indoor environment, both through air quality and thermal comfort. The recently designed Environment and Energy Building includes both mechanical and natural ventilation systems, which will serve as strong models for the fulfillment of these criteria. Cole Roberts of ARUP discussed the general comfort demands of both mechanically and naturally ventilated structures, also including information about air velocity studies in his presentation. Additionally, he mentioned lessons learned from the natural ventilation system in the Terman Engineering Building, as well as a handful of other campus buildings. These lessons illustrate the importance of integrating different design issues (such as thermal mass and maintenance issues) into the design of the GSB, and will aid in making changes and improvements in ventilation performance. For example, Roberts discussed the effectiveness of a green/red light system to alert building inhabitants when to open or close windows. Steps such as these will be used to regulate the indoor environment of the structure. Additionally, the mixed system of mechanical and natural ventilation will ensure that inhabitants’ needs and desires are met at all times. The accumulation of these results will be used in determining an effective ventilation scheme