The Energy Efficiency Guide for Existing Commercial Buildings: Technical Implementation provides specific and practical energy efficiency measures that will help achieve the goal of building sustainability while reducing energy costs. Intended for building engineers and managers with a working knowledge of building systems, this guide demonstrates ways to measure a building's energy efficiency, track that efficiency, develop an energy efficiency plan, and provides guidance on implementing the developed plan. The goal is to provide clear and easily understood technical guidance for energy upgrades, retrofits, and renovations to achieve at least a 30% improvement in energy performance relative to a range of benchmark energy utilization indexes (EUIs).

This Technical Implementation Guide is the second of three planned Energy Efficiency Guides for Existing Commercial Buildings (EEG-EB). Although a part of the highly successful Advanced Energy Design Guide (AEDG) series, the EEG-EB series concentrates solely on existing commercial buildings. The first in the series provided a business case for energy efficiency and was targeted to building owners and managers.

Keywords: Building energy efficiency, energy benchmarking, energy management plan, energy efficiency analysis