Residential Boilers Final DOE Rule
Synopsis of the Final Rule
Feb. 9, 2016
Title III, Part B (1) of the Energy Policy and Conservation Act of 1975 (EPCA or the Act), Public Law 94-163 (42 U.S.C. 6291-6309, as codified), established the Energy Conservation Program for Consumer Products Other Than Automobiles. (2) These products include residential boilers, the subject of this document.
Pursuant to EPCA, any new or amended energy conservation standard must be designed to achieve the maximum improvement in energy efficiency that DOE determines is technologically feasible and economically justified. (42 U.S.C. 6295(o)(2)(A)) Furthermore, the new or amended standard must result in a significant conservation of energy. (42 U.S.C. 6295(o)(3)(B)) EPCA specifically provides that DOE must conduct a second round of energy conservation standards rulemaking for residential boilers. (42 U.S.C. 6295(f)(4)(C)) The statute also provides that not later than 6 years after issuance of any final rule establishing or amending a standard, DOE must publish either a notice of determination that standards for the product do not need to be amended, or a notice of proposed rulemaking including new proposed energy conservation standards (proceeding to a final rule, as appropriate). (42 U.S.C. 6295(m)) DOE initiated this rulemaking as required by 42 U.S.C. 6295(f)(4)(C), but once complete, this rulemaking will also satisfy the 6-year review provision under 42 U.S.C. 6295(m).
Furthermore, EISA 2007 amended EPCA to require that any new or amended energy conservation standard adopted after July 1, 2010, shall address standby mode and off mode energy consumption pursuant to 42 U.S.C. 6295(o). (42 U.S.C. 6295(gg)(3)) If feasible, the statute directs DOE to incorporate standby mode and off mode energy consumption into a single standard with the product's active mode energy use. If a single standard is not feasible, DOE may consider establishing a separate standard to regulate standby mode and off mode energy consumption.
In accordance with these and other statutory provisions discussed in this document, DOE is adopting amended annual fuel utilization efficiency (AFUE) energy conservation standards and adopting new standby mode off mode electrical energy conservation standards for residential boilers. The AFUE standards for residential boilers are expressed as minimum AFUE, as determined by the DOE test method (described in section III.B), and are shown in Table I.1, as are the design requirements. Table I.2 shows the standards for standby mode and off mode. These standards apply to all residential boilers listed in Table I.1 and Table I.2 and manufactured in, or imported into, the United States starting on January 15, 2021.
|Table I.1—AFUE Energy Conservation Standards for Residential Boilers|
|Product class *||AFUE **(%)||Design requirement|
|Gas-fired hot water boiler||84||Constant-burning pilot not permitted. Automatic means for adjusting water temperature required (except for boilers equipped with tankless domestic water heating coils).|
|Gas-fired steam boiler||82||Constant-burning pilot not permitted.|
|Oil-fired hot water boiler||86||Automatic means for adjusting temperature required (except for boilers equipped with tankless domestic water heating coils).|
|Oil-fired steam boiler||85||None.|
|Electric hot water boiler||None||Automatic means for adjusting temperature required (except for boilers equipped with tankless domestic water heating coils).|
|Electric steam boiler||None||None.|
|Table I.2—Energy Conservation Standards for Residential Boilers Standby Mode and Off Mode Electrical Energy Consumption|
|Product class||Standard: P W,SB (watts)||Standard: P W,OFF (watts)|
|Gas-fired hot water boiler||9||9|
|Gas-fired steam boiler||8||8|
|Oil-fired hot water boiler||11||11|
|Oil-fired steam boiler||11||11|
|Electric hot water boiler||8||8|
|Electric steam boiler||8||8|