Commercial Water Heating Equipment

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Commercial water heating equipment includes commercial storage water heaters, commercial instantaneous water heaters and hot water supply boilers, and unfired hot water storage tanks. Commercial water heating equipment includes gas-fired, oil-fired, and electric industrial equipment. As defined in the Code of Federal Regulations (CFR), storage water heaters heat and store water within the appliance at a thermostatically controlled temperature for delivery on demand, and have an input rating less than 4,000 Btu/h per gallon of stored water. Instantaneous water heaters have an input rating not less than 4,000 Btu/h per gallon of stored water. Hot water supply boilers are packaged boilers that heat potable water for purposes other than space heating. Unfired hot water storage tanks store water that is heated externally. 10 CFR 431.102 Manufacturers have been required to comply with the U.S. Department of Energy (DOE) energy conservation standards for commercial water heating equipment since 1992.

Current Standard | Current Test Procedure | Ongoing Rulemaking for Standards | Ongoing Rulemaking for Test Procedure | Helpful Links


Recent and Ongoing Activities

DOE has published a Federal Register supplemental notice of proposed rulemaking (SNOPR) to amend the test procedure for consumer water heaters and residential-duty commercial water heaters. This SNOPR updates the proposals presented in a notice of proposed rulemaking published in the Federal Register on January 11, 2022. In this SNOPR, DOE proposes additional amendments that would provide additional specificity regarding flow rate tolerances for water heaters with a rated storage volume of less than 2 gallons; allow for voluntary representations at certain additionally specified test conditions for heat pump water heaters; revise the proposed specifications regarding separate storage tank requirements for certain types of water heaters; provide instructions for testing certain water heaters that store water at a temperature higher than the delivery setpoint; establish a metric and method for determining the effective storage volume of certain storage-type water heaters; and update the proposed methodology for estimating the internal tank temperature of water heaters which cannot be directly measured.  DOE is seeking comment from interested parties on these proposals.

PETITION FOR RULEMAKING

Notice of Supplemental Proposed Interpretive Rule

  • Federal Register, 85FR60090 (September 24, 2020)

Notice of Proposed Interpretive Rule

For the latest information on the planned timing of future DOE regulatory milestones, see the current Office of Management and Budget Unified Agenda of Regulatory and Deregulatory Actions. All planned dates are preliminary and subject to change.

Standards

Notice of Final Determination; Unfired Hot Water Storage Tanks
  • Federal Register, 87FR31359 (May 24, 2022)
  • The effective date of this Final Determination is July 25, 2022.

Notice of Proposed Rulemaking; Comment Extension

Notice of Proposed Rulemaking

Notification of Final Interpretive Rule

  • Federal Register, 86FR73947 (December 29, 2021)

Notification of Proposed Interpretive Rule; Comment Extension 

Notification of Proposed Interpretive Rule

  • Federal Register, 86FR53014 (September 24, 2021)
  • Federal Register, 86FR48049 (August 27, 2021)

Notification of Proposed Determination

  • Federal Register, 86FR30796 (June 10, 2021)

Notice of Final Interpretive Rule

  • Federal Register, 86FR4776 (January 15, 2021)

Notice of Final Interpretive Rule

  • Federal Register, 85FR67312 (October 22, 2020)

Request for Information; Reopening of Public Comment Period

Request for Information; Unfired Hot Water Storage Tanks

Notice of Petition for Rulemaking; Comment Extension

Notice of Petition for Rulemaking

  • Federal Register, 84 FR 449 (January 29, 2019)
  • Federal Register, 83 FR 54883 (November 1, 2018)

The commercial water heating equipment energy conservation standard rulemaking docket EERE-2014-BT-STD-0042 contains all notices, public comments, public meeting transcripts, and supporting documents pertaining to this rulemaking.

Public Meeting Information:

There is no public meeting scheduled at this time.

 

Submitting Public Comments

The comment period is closed.

RELATED DOCUMENTS

Notice of Proposed  Rulemaking
Notice of Data Availability

DOE undertook a rulemaking that concluded with a final rule in July 2015 amending energy conservation standards for commercial oil-fired storage water heaters. 80 FR 42614 (July 17, 2015). The rulemaking docket EERE-2014-BT-STD-0015 for energy conservation standard and test procedures for certain commercial heating, air conditioners, and water heating equipment (including commercial oil-fired storage water heaters) contains all notices, public comments, public meeting transcripts, and supporting documents pertaining to this rulemaking.

Test Procedure

Supplemental Notice of Proposed Rulemaking
  • Federal Register, 87FR42270 (July 14, 2022)

Notice of Proposed Rulemaking

  • Federal Register, 87FR1554 (January 11, 2022)

DOE undertook a rulemaking that concluded with a final rule in November 2016 to revise the commercial water heaters test procedure. 81 FR 79261.

The commercial water heater test procedure rulemaking docket EERE-2014-BT-TP-0008 contains all notices, public comments, public meeting transcripts, and supporting documents pertaining to this rulemaking.

Public Meeting Information

There is no public meeting scheduled at this time.

Submitting Public Comments

The comment period is closed.


Current Standard

Commercial water heating equipment manufactured and distributed in commerce, as defined by 42 U.S.C. 6291(16), must meet the energy conservation standards specified in the Code of Federal Regulations at 10 CFR 431.110.


Current Test Procedure

To determine that commercial water heating equipment that is currently manufactured or distributed into commerce is in compliance with DOE standards, manufacturers must follow the test procedure methods specified at 10 CFR 431.106.


Helpful Links

Compliance

DOE has established regulations on certification, compliance, and enforcement in the CFR at 10 CFR Part 429.  These regulations cover statistical sampling plans, certified ratings, certification reports, record retention, and enforcement.  More information on these regulations is available here.

Waivers

For information on current test procedure waivers, see DOE’s Waivers webpage.

For information about obtaining test procedure waivers, see 10 CFR part 431, subpart V.

Exceptions

DOE's Office of Hearings and Appeals has not authorized exception relief for commercial water heating equipment.

For information about obtaining exception relief, see 10 CFR part 1003.

Guidance and Frequently Asked Questions

For information on further guidance and answers to Frequently Asked Questions on all covered products, see DOE’s Further Guidance database.

State Exemptions to Federal Pre-emption

DOE has not exempted any state from this energy conservation standard. States may petition DOE to exempt a state regulation from preemption by the Federal energy conservation standard. States may also petition DOE to withdraw such exemptions. For details, see 10 CFR part 431, subpart W.

Contact information

For more information related to this product, please email:
ApplianceStandardsQuestions@ee.doe.gov


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