Spangler Hall, located in the Harvard Business School (HBS), is a 122,000 square foot, brick and limestone building that serves as the main student center. The building has 29 project rooms, a 350-seat auditorium, administrative offices, student lounges, a business center, and kitchen and dining facilities. The dining hall, located in the basement level, averages over 2,000 visitors a day. HBS identified the opportunity to renovate the existing kitchen to not only increase the overall building performance, but also to improve occupant comfort. The renovation included upgrades to HVAC, lighting, plumbing, and kitchen equipment. The HVAC systems were modified to improve occupant comfort, provide healthy indoor air quality, and perform at a high level of energy efficiency. The lighting systems were also designed to reduce energy use, while providing adequate lighting spaces for the spaces.