This standard provides: (a) minimum energy-efficient requirements for the design and construction of: 1. new buildings and their systems@ 2. new portions of buildings and their systems@ and 3. new systems and equipment in existing buildings and (b) criteria for determining compliance with these requirements. The provisions of this standard apply to: (a) the envelope of buildings@ provided that the enclosed spaces are: 1. heated by a heating system whose output capacity is greater than or equal to 10 W/m? or 2. cooled by a cooling system whose sensible output capacity is greater than or equal to 15 W/m?@ and (b) the following systems and equipment used in conjunction with buildings: 1. heating@ ventilating@ and air conditioning@ 2. service water heating@ 3. electric power distribution and metering provisions@ 4. electric motors and belt drives@ and 5. lighting. The provisions of this standard do not apply to: (a) single-family houses@ multi-family structures of three stories or fewer above grade@ manufactured houses (mobile homes) and manufactured houses (modular)@ (b) buildings that do not use either electricity or fossil fuel@ or (c) equipment and portions of building systems that use energy primarily to provide for industrial@ manufacturing@ or commercial processes. Where specifically noted in this standard@ certain other buildings or elements of buildings shall be exempt. This standard shall not be used to circumvent any safety@ health@ or environmental requirements.