Encouraging users to apply the principles of energy conservation when designing buildings and systems is the intent of a new user's manual for the ASHRAE energy standard. The 90.1 User's Manual provides detailed instruction for the design of commercial and high-rise buildings to ensure their compliance with ANSI/ASHRAE/IESNA Standard 90.1-2001, Energy Standard for Buildings Except Low-Rise Residential Buildings. The manual's accompanying CD contains electronic versions of the compliance forms and the EnvStd software, which is used in conjunction with the building envelope trade-off compliance method. The manual also includes information on energy simulation computer programs used in the energy cost budget method of compliance.