Small commercial buildings (less than 50,000 ft2) make up more than 90 percent of the U.S. commercial building stock. Of those small buildings, most are considered "simple commercial buildings." Many of the complex requirements in the International Energy Conservation Code (IECC) do not apply to simple commercial buildings, so this Compliance Guide was created to parse out only the requirements needed for simple buildings. This book is a step-by-step guide on how simple commercial buildings can comply with the 2009 IECC. It provides detailed guidance and many illustrations for the four main energy-related elements in simple commercial buildings: building envelope, mechanical systems, service hot water heating; and electrical power and lighting systems. This book is ideal for designers, contractors and code officials.