§ 431.77. Energy conservation standards and their effective dates.
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/us/cfr/t10/s§ 431.77·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
(a)Gas-fired commercial warm air furnaces. Each gas-fired commercial warm air furnace must meet the following energy efficiency standard levels:
(1)For gas-fired commercial warm air furnaces manufactured starting on January 1, 1994, until January 1, 2023, the TE at the maximum rated capacity (rated maximum input) must be not less than 80 percent; and
(2)For gas-fired commercial warm air furnaces manufactured starting on January 1, 2023, the TE at the maximum rated capacity (rated maximum input) must be not less than 81 percent.
(b)Oil-fired commercial warm air furnaces. Each oil-fired commercial warm air furnace must meet the following energy efficiency standard levels:
(1)For oil-fired commercial warm air furnaces manufactured starting on January 1, 1994, until January 1, 2023, the TE at the maximum rated capacity (rated maximum input) must be not less than 81 percent; and
(2)For oil-fired commercial warm air furnaces manufactured starting on January 1, 2023, the TE at the maximum rated capacity (rated maximum input) must be not less than 82 percent. [81 FR 2528, Jan. 15, 2016]
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§ 431.77
Energy conservation standards and their effective dates.
Fed. Reg.×28
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