Rating System

LEED BD+C: New Construction, LEED O+M: Existing Buildings, LEED ID+C: Commercial Interiors, LEED BD+C: Core and Shell, LEED BD+C: Schools

Rating System Version

v3 - LEED 2008, v2 - Schools 2007, v2 - LEED 2.2, v2 - LEED 2.0

Inquiry

(Project is registered under NC 2.1 but will submit this credit according to the requirements of NC 2.2 through LEED Online) Our project is the new construction of a 47,000 ft2 4-story recreation/office building to serve as a community center for the Washington, DC Parks and Recreation department. The program consists of an indoor gymnasium and stage, multipurpose room, arcade, computer training room, offices, classrooms, weight and exercise room, and locker room facilities. Our lighting control strategy is to maximize energy efficiency while providing a suitable level of individual task lighting control for user workstations. The design solution is to offer dual purpose occupancy/ daylight sensors in multi-occupancy spaces, individual task lighting control for 90% of users in open and private offices, and multiple levels of switching in the gymnasium and stage. We are requesting an interpretation for the requirement to provide lighting system controllability for all shared multi-occupant spaces to enable lighting adjustment that meets group needs and preferences. The multi-occupant spaces in our project consist of a gymnasium, a multipurpose room, classrooms, and a weight and exercise room. With the exception of the gymnasium, each of these spaces is less than 2,500 square feet and is provided with at least 4 separate lighting controls as stated in LEED-NC Version 2.1 (Occupancy sensor, Daylight sensor). The occupancy sensor turns the lights on when it senses motion in the room while the daylight sensor keeps the lights from turning on if there is enough daylight. Two of these spaces, a computer training room, and an arcade, are located at the building interior. The controls are the same, but the daylight sensor function will be cancelled due to the lack of daylight in these spaces. The multi-purpose room has an additional level of lighting to accommodate special lighting needs that would require more flexibility. Thy gymnasium is 5800sf and the lighting design for this space is divided into 4 lighting zones, each zone provided with dedicated dual switching. Each light fixture includes two ballasts that are controlled by the dual switches. This space is therefore provided with a total of 8 lighting controls. Will this strategy meet the lighting control requirements for multi-occupant spaces? If it will not, what additional features need to be added to meet the minimum requirements?