qualified energy property
(2) Qualified energy property The term “qualified energy property” means any of the following: (A) Any of the following which meet or exceed the highest efficiency tier (not including any advanced tier) established by the Consortium for Energy Efficiency which is in effect as of the beginning of the calendar year in which the property is placed in service: (i) An electric or natural gas heat pump water heater. (ii) An electric or natural gas heat pump. (iii) A central air conditioner. (iv) A natural gas, propane, or oil water heater. (v) A natural gas, propane, or oil furnace or hot water boiler. (B) A biomass stove or boiler which— (i) uses the burning of biomass fuel to heat a dwelling unit located in the United States and used as a residence by the taxpayer, or to heat water for use in such a dwelling unit, and (ii) has a thermal efficiency rating of at least 75 percent (measured by the higher heating value of the fuel). (C) Any oil furnace or hot water boiler which— (i) is placed in service after December 31, 2022 , and before January 1, 2027 , and— (I) meets or exceeds 2021 Energy Star efficiency criteria, and (II) is rated by the manufacturer for use with fuel blends at least 20 percent of the volume of which consists of an eligible fuel, or (ii) is placed in service after December 31, 2026 , and— (I) achieves an annual fuel utilization efficiency rate of not less than 90, and (II) is rated by the manufacturer for use with fuel blends at least 50 percent of the volume of which consists of an eligible fuel. (D) Any improvement to, or replacement of, a panelboard, sub-panelboard, branch circuits, or feeders which— (i) is installed in a manner consistent with the National Electric Code, (ii) has a load capacity of not less than 200 amps, (iii) is installed in conjunction with— (I) any qualified energy efficiency improvements, or (II) any qualified energy property described in subparagraphs (A) through (C) for which a credit is allowed under this section for expenditures with respect to such property, and (iv) enables the installation and use of any property described in subclause (I) or (II) of clause (iii).