Best Practice Guide for Office Buildings

OFFICE BUILDINGS Influential Factors for Lighting Control Energy Code Requirements Mandatory energy codes now require the use of lighting controls in nonresidential buildings and include specific control requirements for interior and exterior lighting. Since 2002, when the Department of Energy (DOE) selected ANSI/ASHRAE/IESNA Standard 90.1-1999 as the commercial building reference standard for state building energy codes, many states have adopted ASHRAE-based codes. Other jurisdictions have adopted the IECC code, which includes an ASHRAE-based compliance alternative. Still other jurisdictions have developed their own codes. For a summary overview of the lighting control requirements of the major energy codes (i.e., ASHRAE 90.1, IECC, and California Title 24), turn to pages 76-77 of this guide. Both ASHRAE 90.1 and IECC require automatic lighting shutoff control for buildings greater than 5000 square feet. This means that occupancy sensing, time scheduling or signalling from building automation systems must be used to automatically turn lights off. In addition, most codes have requirements related to lighting control in individual spaces, location of space controls and control of exterior lighting. Energy Efficiency With rising energy costs, making commercial office facilities operate as efficiently as possible is of increasing importance. Good lighting control design not only reduces costs, but helps preserve non-renewable resources that are used to create energy. Sustainable Building Practices The U.S. Green Buildings Council’s LEED program encourages architects to use a holistic building design approach. This includes optimizing daylight penetration and views to the exterior as well as designing well-integrated systems that maximize energy savings. In a Green Building design, lighting controls are important for three primary reasons. First, they enable compliance with ASHRAE 90.1-2004, a stated prerequisite under LEED v2.2. Second, LEED encourages architectural daylighting design, which can actually increase a building’s energy consumption if not accompanied by automatic controls that dim or turn off electric lights when adequate daylight exists. Third, electrical energy usage can be further reduced by integrating the operation of lighting and mechanical systems. Safety and Security Providing lighting when and where needed is a key factor of safety and security. Proper design and use of lighting controls is an integral part of addressing these concerns. Location and accessibility to manual controls, adequate emergency lighting, timely exterior lighting control, reliable system operation as well as other lighting control elements, all play a part in ensuring safety and security in commercial office buildings. 5 www.wattstopper.com • 800.879.8585 http://www.wattstopper.com

Table of Contents Feed for the Digital Edition of Best Practice Guide for Office Buildings

Best Practice Guide for Office Buildings Contents Lighting Control Best Practice Guide for Office Buildings Value of Lighting Control for Office Buildings Office Building Space Usage Influential Factors for Lighting Control Office Building Lighting Control Design Guidelines Office Building Best Practice Guide Roadmap Summary of Best Practices for Lighting Control in Office Buildings Buildings Conference Rooms Cubicles Hallways Kitchens Open Offices Private Offices Restrooms Stairwells Storage Closets Exterior Lighting Summary of Energy Codes

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