This guide provides an overview of best practices for energy-efficient data center design which spans the categories of information technology (IT) systems and their environmental conditions, data center air management, cooling and electrical systems, and heat recovery. Neither the United States Government nor any agency thereof, nor any of their employees, nor any of their contractors, subcontractors or their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or any third party's use. As data centers face soaring power demands, our new white paper introduces Energy System Design (ESD)—a powerful tool that helps operators balance cost, reliability, and sustainability. Through real-world modeling and a detailed case study, the paper shows how hybrid energy systems can reduce. How Automation and Analytics throughout a Data Center Lifecycle Can Help Reduce Energy Use and Environmental Impact EXECUTIVE SUMMARY. 3 INTRODUCTION. DOE's National Renewable Energy Laboratory (NREL) is dedicated to energy efficiency and renewable energy research and development. So, FEMP turned to NREL to develop a guide that Federal agencies can follow to optimize energy and water usage in their data centers. This blog article explores the guide's.