Gas-fired and Oil-fired storage water heaters – December 2016

Technical bulletin on amending the standard

This technical bulletin has been released to initiate the consultation process and to collect stakeholder views on the requirements being considered for gas-fired and oil-fired storage water heaters.

Input received during this stage of the process will inform the development of the Amendment 14 proposal. 

Background

Gas-fired and oil-fired storage water heaters were first regulated in Canada in 1995. The current regulation sets minimum energy performance standards (MEPS) for the energy consumption of these water heaters using Energy factor (EF). On July 11, 2014, the United States Department of Energy (U.S. DOE) issued a final rule for a new test procedure for rating the energy consumption of water heaters using a new Uniform Energy Factor (UEF). The Canadian Standards Association (CSA) published an update to the P.3 test standard in December 2015 effectively harmonizing with the U.S. UEF test procedure. On December 6, 2016, the U.S. DOE published a Final Rule outlining the conversion factors to translate a water heater’s EF rating to UEF and to translate their current MEPS from EF to UEF.

The UEF test method encourages water heater manufactures to design energy efficient water heaters to meet specific applications. The previous EF test method subjected all sizes of water heaters to the same simulated use test. The new UEF test method divides water heaters into 4 separate simulated use tests according to useful output of hot water. The simulated use tests are a reflection of how the water heater will be used in a home or business. Each UEF simulated use test has a unique MEPS associated with it and therefore a new target to improve energy efficiency.   

NRCan is considering introducing the UEF test procedure (P.3-15) along with the current MEPS translated to UEF.  This would change the performance metric for gas-fired and oil-fired storage water heaters from EF to UEF. If implemented, this proposal would ensure the test procedure for gas-fired and oil-fired storage water heaters are aligned with those of the U.S. DOE. As an interim step, NRCan is proposing that gas-fired and oil-fired water heaters can demonstrate compliance to the current MEPS by either P.3-04 (EF) or P.3-15 (UEF), until such time as the UEF MEPS are updated in a future amendment.  

Product description

A gas-fired and an oil-fired storage water heater provides domestic hot water for use in cooking, cleaning and bathing, using natural gas, propane, or oil as the fuel source.

Energy performance test procedure

NRCan is proposing to reference the CSA P.3 – 15 Test method for measuring energy consumption and determining efficiencies of gas-fired and oil-fired water heaters.

The test procedure can be found at: http://shop.csa.ca

Energy performance standard

Proposed MEPS for gas-fired and oil-fired storage water heaters
Product type Uniform Energy Factor (UEF)
Gas-fired storage water heaters that have an input rate of ≤ 21.97 kW (75,000 Btu/h), and very small usage as determined by a first hour rating of less than 68 L (18 US gal)  UEF ≥ 0.3456-0.0005*Vs
Gas-fired storage water heaters that have an input rate of ≤ 21.97 kW (75,000 Btu/h), and low usage as determined by a first hour rating of greater than or equal to 68 L (18 US gal) but less than 193 L (51 US gal) UEF ≥ 0.5982-0.0005*Vs
Gas-fired storage water heaters that have an input rate of ≤ 21.97 kW (75,000 Btu/h), and medium usage as determined by a first hour rating of greater than or equal to 193 L (51 US gal) but less than 284 L (75 US gal) UEF ≥ 0.6483-0.00045*Vs
Gas-fired storage water heaters that have an input rate of ≤ 21.97 kW (75,000 Btu/h), and high usage as determined by a first hour rating of greater than or equal to 284 L (75 US gal). UEF ≥ 0.6920-0.00034*Vs
Oil-fired storage water heaters that have an input rate of ≤ 30.5 kW (105,000 Btu/h), and very small usage as determined by a first hour rating of less than 68 L (18 US gal)  UEF ≥ 0.2509-0.00032*Vs
Oil-fired storage water heaters that have an input rate of ≤ 30.5 kW (105,000 Btu/h), and low usage as determined by a first hour rating of greater than or equal to 68 L (18 US gal) but less than 193 L (51 US gal) UEF ≥ 0.5330-0.00042*Vs
Oil-fired storage water heaters that have an input rate of ≤ 30.5 kW (105,000 Btu/h), and medium usage as determined by a first hour rating of greater than or equal to 193 L (51 US gal) but less than 284 L (75 US gal) UEF ≥ 0.6078-0.00042*Vs
Oil-fired storage water heaters that have an input rate of ≤ 30.5 kW (105,000 Btu/h), and high usage as determined by a first hour rating of greater than or equal to 284 L (75 US gal). UEF ≥ 0.6815-0.00037*Vs

*Where Vs is storage capacity of the water heater in litres.

Effective date

These regulations would come into force upon the date of publication in the Canada Gazette, Part II.

NRCan proposes that the new standards will apply to gas-fired and oil-fired storage water heaters that have been manufactured on or after January 1, 2018.

Labelling requirements

NRCan is not proposing labelling requirements for gas-fired and oil-fired storage water heaters at this time.

Verification requirements

There is no change proposed for the energy efficiency verification requirements for this product.

Reporting requirements

Energy efficiency reports

The energy efficiency report required for gas-fired and oil-fired storage water heaters will include the following product specific information, in addition to the reporting requirements already in place for gas-fired and oil-fired storage water heaters:

  • Vs, in Litres
  • uniform energy factor
  • draw pattern

The Regulations apply to products imported or shipped inter-provincially for sale or lease in Canada. This report must be submitted, by the dealer, to NRCan before the product is imported into Canada or traded inter-provincially for the first time.

Import reports

There is no change proposed to import reporting requirements for gas-fired and oil-fired storage water heaters.

Comments Invited

The purpose of this bulletin is to provide stakeholders with technical detail required to comment on the requirements under consideration for gas-fired and oil-fired storage water heaters. 

Natural Resources Canada is specifically interested in receiving feedback regarding the testing burden to manufacturers introduced by the UEF test method.  As well, NRCan is interested in receiving feedback regarding the metric conversion of the translated minimum energy performance standards to UEF.

Additional information on Canada’s Energy Efficiency Regulations including a current list of Standards Council of Canada accredited certification bodies can be found in the Department’s website.

We welcome your comments by January 27, 2017. All correspondence should be forwarded to:

Office of Energy Efficiency
Natural Resources Canada
580 Booth Street
Ottawa, ON, K1A 0E4
E-mail: nrcan.equipment.rncan@canada.ca