ASHRAE Standard 90.1

ASHRAE Standard 90.1 is a set of guidelines developed by the American Society of Heating, Refrigerating, and Air-Conditioning Engineers to promote energy efficiency in building design and construction. It establishes minimum requirements for things like insulation, lighting, HVAC systems, and building envelope performance, aiming to reduce energy consumption and environmental impact without sacrificing comfort or functionality. By following these standards, architects and engineers help ensure buildings use less energy while maintaining high performance levels. It is widely adopted in the U.S. as part of building codes to support sustainable and cost-effective building practices.