Bulk buying savings—storage tank water heaters

ENERGY STAR®—saving time, energy and money

Energy Star logo

ENERGY STAR Canada makes green procurement easier in a number of ways. (See a full description at Making the business case.)

One of the most useful is the ENERGY STAR Simple Savings Calculator. This downloadable tool lets you compare as many as three ENERGY STAR certified models against a conventional model of the same product type.

As the example for storage tank water heaters in the table below illustrates, you can calculate:

  • energy savings
  • operating cost savings
  • simple payback on investment
  • greenhouse gas (GHG) emission reductions
  • annual and product lifetime savings

The add-on ENERGY STAR Summary Calculator allows you to figure comparisons for a number of different product types in one spreadsheet.

Note: These ENERGY STAR calculators generate estimates of energy, cost and emissions savings using base energy prices and other factors that are developed from Government of Canada data and energy rates posted by provincial and territorial utilities. National average energy costs are calculated and used as the calculators’ default settings. Users can localize the settings by selecting a province or territory, or inputting their own data. All values are updated regularly.

Learn more about procurement.

Cost-savings example—200 gas-fired storage tank water heaters
(13 year life)

Annual Lifetime Annual Lifetime
Energy consumption (GJ) 5,580 72,542 6,136 79,768
Energy cost (@ 8.21/GJ)


$361,937 $50,355 $397,994
Maintenance cost $0 $0 $0 $0
Total operating cost $45,793 $361,937 $50,355 $397,994
Incremental cost   $0    
Total life-cycle cost   $361,937   $397,994
Total energy savings (GJ) 556 7,227    
Total energy and maintenance cost savings $4,562 $36,057    
Emissions savings (kg CO2) 27,650 359,450    
Payback period 0 years (based on incremental cost of $0 per ENERGY STAR certified unit)

Product specification summary

The ENERGY STAR name and symbol are administered and promoted in Canada by Natural Resources Canada and are registered in Canada by the United States Environmental Protection Agency.