(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 Water | Gas-fired | ≥300,000 and ≤2,500,000 | Thermal Efficiency | Appendix A, Section 2. |
| Hot Water | Gas-fired | >2,500,000 | Combustion Efficiency | Appendix A, Section 3. |
| Hot Water | Oil-fired | ≥300,000 and ≤2,500,000 | Thermal Efficiency | Appendix A, Section 2. |
| Hot Water | Oil-fired | >2,500,000 | Combustion Efficiency | Appendix A, Section 3. |
| Steam | Gas-fired (all*) | ≥300,000 and ≤2,500,000 | Thermal Efficiency | Appendix A, Section 2. |
| Steam | Gas-fired (all*) | >2,500,000 and ≤5,000,000 | Thermal Efficiency | Appendix A, Section 2. |
| >5,000,000 | Thermal Efficiency | Appendix A, Section 2. OR Appendix A, Section 3 with Section 2.4.3.2. |
||
| Steam | Oil-fired | ≥300,000 and ≤2,500,000 | Thermal Efficiency | Appendix A, Section 2. |
| Steam | Oil-fired | >2,500,000 and ≤5,000,000 | Thermal Efficiency | Appendix A, Section 2. |
| >5,000,000 | Thermal Efficiency | Appendix 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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