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Electronic Code of Federal Regulations

e-CFR data is current as of December 9, 2019

Title 10Chapter IISubchapter DPart 431Subpart E → §431.86


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


§431.86   Uniform test method for the measurement of energy efficiency of commercial packaged boilers.

(a) Scope. This section provides test procedures, pursuant to the Energy Policy and Conservation Act (EPCA), as amended, which must be followed for measuring the combustion efficiency and/or thermal efficiency of a gas- or oil-fired commercial packaged boiler.

(b) Testing and Calculations. Determine the thermal efficiency or combustion efficiency of commercial packaged boilers by conducting the appropriate test procedure(s) indicated in Table 1 of this section.

Table 1—Test Requirements for Commercial Packaged Boiler Equipment Classes

Equipment categorySubcategoryCertified rated input
Btu/h
Standards efficiency metric
(§431.87)
Test procedure
(corresponding to
standards efficiency
metric required
by §431.87)
Hot WaterGas-fired≥300,000 and ≤2,500,000Thermal EfficiencyAppendix A, Section 2.
Hot WaterGas-fired>2,500,000Combustion EfficiencyAppendix A, Section 3.
Hot WaterOil-fired≥300,000 and ≤2,500,000Thermal EfficiencyAppendix A, Section 2.
Hot WaterOil-fired>2,500,000Combustion EfficiencyAppendix A, Section 3.
SteamGas-fired (all*)≥300,000 and ≤2,500,000Thermal EfficiencyAppendix A, Section 2.
SteamGas-fired (all*)>2,500,000 and ≤5,000,000Thermal EfficiencyAppendix A, Section 2.
   >5,000,000Thermal EfficiencyAppendix A, Section 2.
OR
Appendix A, Section 3 with Section 2.4.3.2.
SteamOil-fired≥300,000 and ≤2,500,000Thermal EfficiencyAppendix A, Section 2.
SteamOil-fired>2,500,000 and ≤5,000,000Thermal EfficiencyAppendix A, Section 2.
   >5,000,000Thermal EfficiencyAppendix A, Section 2.
OR
Appendix A, Section 3. with Section 2.4.3.2.

*Equipment classes for commercial packaged boilers as of July 22, 2009 (74 FR 36355) distinguish between gas-fired natural draft and all other gas-fired (except natural draft).

(c) Field Tests. The field test provisions of appendix A may be used only to test a unit of commercial packaged boiler with rated input greater than 5,000,000 Btu/h.

[81 FR 89305, Dec. 9, 2016]

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