C.F.R. » Title 10 » CHAPTER II—DEPARTMENT OF ENERGY › SUBCHAPTER D—ENERGY CONSERVATION › PART 431—ENERGY EFFICIENCY PROGRAM FOR CERTAIN COMMERCIAL AND INDUSTRIAL EQUIPMENT › Subpart E—Commercial Packaged Boilers

10 C.F.R. § 431.87

Energy conservation standards and their effective dates

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(a) Each commercial packaged boiler listed in table 1 of this paragraph (a) and manufactured on or after the effective date listed must meet the indicated energy conservation standard.

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

Equipment categorySubcategoryCertified rated inputEfficiency 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, all, except natural draft≥300,000 Btu/h and ≤2,500,000 Btu/h79.0% ET.
Steam Commercial Packaged BoilersGas-fired, 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.
* Where EC is combustion efficiency and ET is thermal efficiency.

(b) Each commercial packaged boiler listed in table 2 of this paragraph (b) and manufactured on or after the effective date listed in Table 2 must meet the indicated energy conservation standard.

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

Equipment categorySubcategoryCertified rated inputEfficiency level—effective date: March 2, 2022 *
Steam Commercial Packaged BoilersGas-fired—natural draft≥300,000 Btu/h and ≤2,500,000 Btu/h79.0% ET.
Steam Commercial Packaged BoilersGas-fired—natural draft>2,500,000 Btu/h79.0% ET.
* Where ET is thermal efficiency.
[88 FR 64352, Sept. 19, 2023]