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e-CFR data is current as of October 22, 2020

Title 10Chapter IISubchapter DPart 431Subpart E → Subject Group


Title 10: Energy
PART 431—ENERGY EFFICIENCY PROGRAM FOR CERTAIN COMMERCIAL AND INDUSTRIAL EQUIPMENT
Subpart E—Commercial Packaged Boilers


Energy Efficiency Standards

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

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

Table 1 to §431.87—Commercial Packaged Boiler Energy Conservations Standards

EquipmentSubcategorySize category
(input)
Efficiency 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 ET means “thermal efficiency” and EC means “combustion efficiency” as defined in 10 CFR 431.82.

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

Table 2 to §431.87—Commercial Packaged Boiler Energy Conservations Standards

EquipmentSize 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.
Small Oil-Fired Hot Water Commercial Packaged Boilers≥300,000 Btu/h and ≤2,500,000 Btu/h87.0% 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 Boilers>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.

*Where ET means “thermal efficiency” and EC means “combustion efficiency” as defined in 10 CFR 431.82.

**Prior to March 2, 2022, for natural draft very large gas-fired steam commercial packaged boilers, a minimum thermal efficiency level of 77 percent is permitted and meets Federal commercial packaged boiler energy conservation standards.

[85 FR 1681, Jan. 10, 2020]

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