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@ and3. 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 3.4 Btu/h??ft2 or2. cooled by a cooling system whose sensible output capacity is greater than or equal to 5 Btu/h??ft2@ 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@ and5. 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.