There have been multiple editions to it since. The original standard, ASHRAE 90, was published in 1975. single-family homes, multi-family buildings less than four stories high, mobile homes and modular homes). ANSI/ASHRAE/IES Standard 90.1: Energy Standard for Buildings Except Low-Rise Residential Buildings is an American National Standards Institute (ANSI) standard published by ASHRAE and jointly sponsored by the Illuminating Engineering Society (IES) that provides minimum requirements for energy efficient designs for buildings except for low-rise residential buildings (i.e.
