Advanced Energy Retrofit Guide (AERG) for Office Buildings
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The Advanced Energy Retrofit Guides (AERGs) for Existing Buildings have been developed to help building owners, facility managers and energy managers select the energy efficiency improvements that best suit building type and location, and successfully execute those improvements. Emphasis is put on actionable information, practical methodologies, diverse case studies, and objective evaluations of the most promising retrofit measures for each building type. This guide addresses office buildings, which represent approximately 17% of energy use in commercial buildings nationwide. This guide primarily applies to facility managers and energy managers of large existing office buildings (>100,000 sf), but also includes considerations for small and medium office buildings. To address the diversity, this guide presents three levels of upgrade options: (1) Implementing operations & maintenance (O&M) improvements through Existing Building Commissioning(EBCx) (up to 25% savings), (2) standard retrofits (25%-45% savings), and (3) deep retrofits (above 45%). In this guide, standard retrofit measures provide cost-effective and low-risk efficiency upgrade options including equipment, system and assembly retrofits. Deep retrofit measures require a larger upfront investment and may have longer payback periods than O&M or standard retrofit measures. Another layer of diversity is created by the dependence of retrofit options on climate, so the upgrade options for standard and deep retrofits are customized for five different climates. This multi-level and multi-climate approach broadens the applicability of the guides to a wide range of situations. Many stakeholders have been involved in this scoping process to help refine the primary audiences for the final guide and to identify market and technical barriers to energy retrofits.
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|Information Type: Design Guides; Reports and Publications|
|Date: October 2011|
This guide has been created to help building owners, facility managers and energy managers plan, design, and implement energy efficiency measures in their existing buildings to realize savings from EBCx (up to 25%) to deep retrofit (above 45%).
A 2011 survey identified record high interest in energy efficiency projects among building owners and facility managers, but also noted significant barriers relating to project finance and planning. This guide provides building owners and facility managers with insightful information to address those barriers, including robust approaches to project planning, plus data and methods for financial analysis.
This guide addresses office buildings, which represent approximately 17% of energy use in commercial buildings nationwide, more than any other building type. And with almost 60% of existing office buildings built before 1980, many are past due for upgrades to aging building equipment, systems, and assemblies. Office buildings offer significant opportunities for deep, cost-effective energy efficiency improvements, and this guide provides practical and specific guidance for realizing these opportunities.
Phase of Delivery Process
Building Analysis, Performance, and Monitoring; Daylighting; Energy Efficiency; Envelope; Heating, Ventilation, and Air Conditioning; Lighting; Miscellaneous Electric Loads; Operations and Maintenance; Whole Building Design