This Standard covers new residential dwelling units for human occupancy. For purposes of this Standard, residential dwelling units include single family houses and multi-family structures of three stories (above grade) or fewer including manufactured housing and mobile homes, and does not include transient housing such as hotels, motels, nursing homes, jails and barracks. This Standard covers building envelope, heating and air-conditioning equipment and systems, and provisions for overall building design alternatives and trade-offs. This Standard does not cover specific procedures for the operation, maintenance and use of residential buildings. This Standard does not cover portable products such as appliances and heaters. This Standard does not cover residential electric service wiring or lighting requirements.