points by which the efficiency ratio for the qualified building is certified to be greater than 20 percent. (3) Efficiency ratio (A) In general For purposes of this section, the efficiency ratio of a qualified building shall be equal to the quotient, expressed as a percentage, obtained by dividing— (i) an amount equal to the difference between— (I) the projected annual level of energy consumption of the qualified building after the energy efficiency improvements have been placed in service, and (II) the annual level of energy consumption of such qualified building prior to the energy efficiency improvements being placed in service, by (ii) the annual level of energy consumption described in clause (i)(II). (B) Exclusion of plug loads For purposes of determining the annual level of energy consumption of the qualified building under this paragraph, any energy consumption attributable to plug loads shall be excluded. (4) Coordination with clean energy investment credit For purposes of paragraph (3)(A)(i), the determination of the difference in annual levels of energy consumption of the qualified building shall not include any reduction in net energy consumption related to qualified property or energy storage property for which a credit was allowed under section 48E. (c) Definitions (1) Qualified building The term qualified building means a building— (A) located in the United States, (B) which is owned by the taxpayer, and (C) which is certified to have— (i) a projected annual level of energy consumption after the energy efficiency improvements have been placed in service that is less than the annual level of energy consumption prior to the energy efficiency improvements being placed in service, and (ii) an efficiency ratio of not less than 20 percent. (2) Energy efficiency improvements (A) In general The term energy efficiency improvements means any property installed on or in a qualified building which has been certified to reduce the level of energy consumption for such building, provided that depreciation (or