10 CFR 431.87 - Energy conservation standards and their effective dates.

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§ 431.87 Energy conservation standards and their effective dates.

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

Table 1 - Commercial Packaged Boiler Energy Conservation Standards

Equipment category Subcategory Certified rated input Efficiency level -
effective date:
March 2, 2012*
Hot Water Commercial Packaged Boilers Gas-fired ≥300,000 Btu/h and ≤2,500,000 Btu/h 80.0% ET.
Hot Water Commercial Packaged Boilers Gas-fired >2,500,000 Btu/h 82.0% EC.
Hot Water Commercial Packaged Boilers Oil-fired ≥300,000 Btu/h and ≤2,500,000 Btu/h 82.0% ET.
Hot Water Commercial Packaged Boilers Oil-fired >2,500,000 Btu/h 84.0% EC.
Steam Commercial Packaged Boilers Gas-fired - all, except natural draft ≥300,000 Btu/h and ≤2,500,000 Btu/h 79.0% ET.
Steam Commercial Packaged Boilers Gas-fired - all, except natural draft >2,500,000 Btu/h 79.0% ET.
Steam Commercial Packaged Boilers Gas-fired - natural draft ≥300,000 Btu/h and ≤2,500,000 Btu/h 77.0% ET.
Steam Commercial Packaged Boilers Gas-fired - natural draft >2,500,000 Btu/h 77.0% ET.
Steam Commercial Packaged Boilers Oil-fired ≥300,000 Btu/h and ≤2,500,000 Btu/h 81.0% ET.
Steam Commercial Packaged Boilers Oil-fired >2,500,000 Btu/h 81.0% ET.

* Where EC is combustion efficiency and ET is thermal efficiency.

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

Table 2 - Commercial Packaged Boiler Energy Conservation Standards

Equipment category Subcategory Certified rated input Efficiency level -
Effective Date:
March 2, 2022*
Steam Commercial Packaged Boilers Gas-fired - natural draft ≥300,000 Btu/h and ≤2,500,000 Btu/h 79.0% ET.
Steam Commercial Packaged Boilers Gas-fired - natural draft >2,500,000 Btu/h 79.0% ET.

* Where ET is thermal efficiency.

[ 81 FR 89306, Dec. 9, 2016]
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