§ 431.87 - Energy conservation standards and their effective dates.


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  • § 431.87 Energy and water conservation standards and their effective dates.

    (a) Each commercial packaged boiler listed in Table 1 to § 431.87 table 1 of this paragraph (a) and manufactured on or after March 2, 2012 and prior to January 10, 2023, the effective date listed must meet the applicable indicated energy conservation standard levels as follows: .

    Table 1 to § 431.87Paragraph (a)—Commercial Packaged Boiler Energy Conservations Conservation Standards

    Equipment category Subcategory Size category (Certified rated input ) Efficiency level— effective level—effective date: March 2, 2012 *
    Hot Water Commercial Packaged BoilersGas-fired≥300,000 Btu/h and ≤2,500,000 Btu/h80.0% ET.
    Hot Water Commercial Packaged BoilersGas-fired>2,500,000 Btu/h82.0% EC.
    Hot Water Commercial Packaged BoilersOil-fired≥300,000 Btu/h and ≤2,500,000 Btu/h82.0% ET.
    Hot Water Commercial Packaged BoilersOil-fired>2,500,000 Btu/h84.0% EC.
    Steam Commercial Packaged BoilersGas-fired—allfired, all, except natural draft≥300,000 Btu/h and ≤2,500,000 Btu/h79.0% ET.
    Steam Commercial Packaged BoilersGas-fired—allfired, all, except natural draft>2,500,000 Btu/h79.0% ET.
    Steam Commercial Packaged BoilersGas-fired—natural draft≥300,000 Btu/h and ≤2,500,000 Btu/h77.0% ET.
    Steam Commercial Packaged BoilersGas-fired—natural draft>2,500,000 Btu/h77.0% ET.
    Steam Commercial Packaged BoilersOil-fired≥300,000 Btu/h and ≤2,500,000 Btu/h81.0% ET.
    Steam Commercial Packaged BoilersOil-fired>2,500,000 Btu/h81.0% ET.

    (b) Each commercial packaged boiler listed in Table 2 to § 431.87 table 2 of this paragraph (b) and manufactured on or after January 10, 2023, the effective date listed in Table 2 must meet the applicable indicated energy conservation standard levels as follows: .

    Table 2 to § 431.87Paragraph (b)—Commercial Packaged Boiler Energy Conservations Conservation Standards

    Small Oil-Fired Hot Water Commercial Packaged Boilers
    Equipment Size category (rated input) Energy conservation standard
    Small Gas-Fired Hot Water Commercial Packaged Boilers≥300,000 Btu/h and ≤2,500,000 Btu/h84.0% ET.
    Large Gas-Fired Hot Water Commercial Packaged Boilers>2,500,000 Btu/h and ≤10,000,000 Btu/h85.0% EC.
    Very Large Gas-Fired Hot Water Commercial Packaged Boilers>10,000,000 Btu/h82.0% EC.
    Subcategory Certified rated input Efficiency level—effective date: March 2, 2022 *
    Steam Commercial Packaged BoilersGas-fired—natural draft≥300,000 Btu/h and ≤2,500,000 Btu/h8779.0% ET.
    Large Oil-Fired Hot Water Commercial Packaged Boilers>2,500,000 Btu/h and ≤10,000,000 Btu/h88.0% EC.
    Very Large Oil-Fired Hot Water Commercial Packaged Boilers>10,000,000 Btu/h84.0% EC.
    Small Gas-Fired Steam Commercial Packaged Boilers≥300,000 Btu/h and ≤2,500,000 Btu/h81.0% ET. Large Gas-Fired Steam Commercial Packaged BoilersGas-fired—natural draft>2,500,000 Btu/h and ≤10,000,000 Btu/h82.0% ET. Very Large Gas-Fired Steam Commercial Packaged Boilers **>10,000,000 Btu/h79.0% ET.
    Small Oil-Fired Steam Commercial Packaged Boilers≥300,000 Btu/h and ≤2,500,000 Btu/h84.0% ET.
    Large Oil-Fired Steam Commercial Packaged Boilers>2,500,000 Btu/h and ≤10,000,000 Btu/h85.0% ET.
    Very Large Oil-Fired Steam Commercial Packaged Boilers>10,000,000 Btu/h81.0% ET.
    [85 FR 1681, Jan. 10, 2020

    [88 FR 64352, Sept. 19, 2023]