Navigant Research projects the worldwide market for energy service companies (ESCOs) to double from $15 billion to $30 billion by 2026. ESCOs execute a variety of building energy efficiency services, providing energy efficiency technologies and services in market segments that would not typically be able to afford such projects. These companies ordinarily serve the public sector, such as municipalities, universities, schools and hospitals. The report, ESCO Market Overview, analyzes the global ESCO market, with a focus on three key regions: North America, Western Europe, and Asia Pacific.