The Advanced Energy Design Guide for Small Retail Buildings (AEDG-SR; the Guide) is intended to provide a simple approach for contractors and designers who create retail buildings up to 20,000 ft2. Application of the recommendations in the Guide should result in small retail buildings with 30% energy savings when compared to those same retail buildings designed to the minimum requirements of ANSI/ASHRAE/IESNA Standard 90.1-1999.
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Miscellaneous electrical loads (MELs) are building loads that are not related to general lighting, heating, ventilation, cooling, and water heating, and typically do not provide comfort to the building occupants. MELs in commercial buildings account for almost 5% of U.S. primary energy consumption. On an individual building level, they account for approximately 25% of the total electrical load in a minimally code-compliant commercial building, and can exceed 50% in an ultra-high efficiency building such as the National Renewable Energy Laboratory's (NREL) Research Support Facility (RSF). Minimizing these loads is a primary challenge in the design and operation of an energy-efficient building. A complex array of technologies that measure and manage MELs has emerged in the marketplace. Some fall short of manufacturer performance claims, however. NREL has been actively engaged in developing an evaluation and selection process for MELs control, and is using this process to evaluate a range of technologies for active MELs management that will cap RSF plug loads. Using a control strategy to match plug load use to users' required job functions is a huge untapped potential for energy savings.
The Advanced Energy Design Guide for Medium to Big Box Retail Buildings is designed to provide recommendations to achieve 50% energy savings for retail buildings 20,000 to 100,000 ft2. Energy costs are typically the second-highest operating expense for a retailer, so use of this guide can help in creating a cost-effective design for new retail buildings and major renovations that will consume substantially less energy compared to the minimum code-compliant design and that will result in lower operating costs.