This practical desk reference for energy engineers and managers is designed to serve as a comprehensive resource for performing energy audits in commercial facilities. Although there are no "typical" commercial buildings, the book begins with the premise that when commercial facilities are subdivided into categories based on business type, many useful patterns can be identified that become generally applicable to the performance of an effective energy audit. Hence, discussion of procedures and guidelines is provided for a wide range of business and building types, such as schools and colleges, hospitals and medical facilities, grocery stores, laboratories, lodging, apartment buildings, office buildings, retail, public safety, data centers, libraries, laundries, warehouses, etc. All focal areas of the building energy audit and assessment are covered, including building envelope, lighting, HVAC, controls, heat recovery, thermal storage, electrical systems and utilities.