10 C.F.R. § 431.86

Current through September 30, 2024
Section 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 category Subcategory Certified rated input
Btu/h
Standards efficiency metric
431.87 )
Test procedure
(corresponding to
standards efficiency
metric required
by § 431.87 )
Hot WaterGas-fired[GREATER THAN EQUAL TO]300,000 and [LESS THAN EQUAL TO]2,500,000Thermal EfficiencyAppendix A, Section 2.
Hot WaterGas-fired[GREATER THAN]2,500,000Combustion EfficiencyAppendix A, Section 3.
Hot WaterOil-fired[GREATER THAN EQUAL TO]300,000 and [LESS THAN EQUAL TO]2,500,000Thermal EfficiencyAppendix A, Section 2.
Hot WaterOil-fired[GREATER THAN]2,500,000Combustion EfficiencyAppendix A, Section 3.
SteamGas-fired (all*)[GREATER THAN EQUAL TO]300,000 and [LESS THAN EQUAL TO]2,500,000Thermal EfficiencyAppendix A, Section 2.
SteamGas-fired (all*)[GREATER THAN]2,500,000 and [LESS THAN EQUAL TO]5,000,000Thermal EfficiencyAppendix A, Section 2.
[GREATER THAN]5,000,000Thermal EfficiencyAppendix A, Section 2.
OR
Appendix A, Section 3 with Section 2.4.3.2 .
SteamOil-fired[GREATER THAN EQUAL TO]300,000 and [LESS THAN EQUAL TO]2,500,000Thermal EfficiencyAppendix A, Section 2.
SteamOil-fired[GREATER THAN]2,500,000 and [LESS THAN EQUAL TO]5,000,000Thermal EfficiencyAppendix A, Section 2.
[GREATER THAN]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.

10 C.F.R. §431.86

81 FR 89305, Dec. 9, 2016
81 FR 79251, 12/12/2016; 81 FR 89305, 12/9/2016; 81 FR 89305, 1/9/2016