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Gas-fired storage water heaters - commercial

Energy Efficiency Regulations

Regulatory definition

Commercial gas-fired storage water heater means a stationary gas-heated water container that uses propane or natural gas for fuel, has an input rate of greater than 21.97 kW (75,000 Btu/h) and has a Vr of at least 76 L (20 US gallons).

Compliance date

Manufactured on or after July 1, 2023.

Testing standard

10 C.F.R. Appendix A

Energy efficiency regulations by province

Some provinces also have their own energy efficiency regulations for many of the federally regulated products – find out which ones!

Energy efficiency standard

Energy performance standard for
commercial gas-fired storage water heaters

Energy-using product

Energy efficiency standard

  • 1) Commercial gas-fired storage water heaters, other than replacement units, that have an input rate of > 21.97 kW (75,000 Btu/h) but ≤ 30.5 kW (105,000 Btu/h), have a Vr of ≤ 454 L (120 US gallons), use single-phase power and limit water temperatures to < 82°C (180°F)

Uniform energy factor ≥ 0.8107-0.00021 Vs

  • 2) Commercial gas-fired storage water heaters that are replacement units, have an input rate of > 21.97 kW (75,000 Btu/h) but ≤ 30.5 kW (105,000 Btu/h), have a Vr of ≤ 454 L (120 US gallons), use single-phase power and limit water temperatures to < 82°C (180°F)

Uniform energy factor ≥ 0.6597-0.00024 Vs

  • 3) Commercial gas-fired storage water heaters, other than replacement units, that have a Vr of > 530 L (140 US gallons)

Thermal efficiency ≥ 90%

  • 4) Commercial gas-fired storage water heaters that are replacement units, have a Vr of > 530 L (140 US gallons)

Thermal efficiency ≥ 80%

  • 5) Commercial gas-fired storage water heaters, other than those described in items 1 and 2, that are not replacement units

Thermal efficiency ≥ 90%

Standby loss ≤ 0.84(1.25 Q+ 16.57√Vs)

  • 6) Commercial gas-fired storage water heaters, other than those described in items 1 and 2, that are replacement units

Thermal efficiency ≥ 80%

Standby loss ≤ 1.25 Q+ 16.57√Vs

L = Litres
Vr = the rated nominal volume, typically used in marketing material
V= the measured storage volume as defined in the testing standard
Q = the nameplate input rate in Btu/hr

Energy efficiency report requirements

  • name of product
  • brand name
  • model number
  • manufacturer
  • name of the certification body or province whose verification mark will be on the product or its package
  • whether a mathematical model as defined in the Regulations was used to generate any of the information provided below
  • fuel type
  • Vr, in litres
  • Vs, in litres
  • input rate, in kW (Btu/h)
  • annual energy consumption kJ (Btu)
  • recovery efficiency
  • uniform energy factor
  • thermal efficiency
  • information that indicates whether the product is a replacement unit

Download the energy efficiency reporting template.

This document does not constitute part of the Energy Efficiency Act (Act) or its associated regulations. This document is an administrative document that is intended to facilitate compliance by the regulated party with the Act and its associated regulations. This document is not intended to provide legal advice regarding the interpretation of the Act or its associated regulations. If a regulated party has questions about their legal obligations or responsibilities under the Act or its associated regulations, they should seek the advice of legal counsel.

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