Marketing Materials for Retailers

Handy Reference material on appliances

Quick Facts on Electric Ranges, Cooktops and Ovens

Ranges, cooktops and ovens are already energy efficient, so there are few ways to reduce the energy they use. However, they are still tested for energy consumption. There is no ENERGY STAR® specifications for ranges, cooktops or ovens.

More oven insulation and tighter-fitting oven door gaskets and hinges have already improved the energy efficiency of these appliances. You can help your customers buy wisely and reduce even further the energy consumption of their appliances by providing them with the following information:

  • Smaller ovens use less energy.
  • Self-cleaning ovens are better insulated and retain more heat while cooking, but the self-cleaning cycle is energy-intensive, so use it only when needed.
  • Some ovens have probes to show when the internal temperature of the food has reached the desired temperature, which helps prevent overcooking and wasting energy.
  • According to some studies, the convection option is also considered to be energy efficient.

Ranges
30-inch
1990
(annual energy consumption in kWh/year)
2004
(annual energy consumption in kWh/year)
Self-cleaning 772 622
Non-self-cleaning 786 694

Testing today (CSA Standard C358-03)
The standard also includes tungsten-halogen elements.

Electric Ranges:
Electric ranges with self-cleaning and non-self-cleaning ovens are tested for energy consumption. These ranges include cooktops and single and double built-in ovens. Cooktops and ovens are tested separately. For ranges, the consumption rates of the cooktop and oven are added together.

List of models : electric ranges

Cooktops:
An aluminum test block containing an electric thermometer is placed on a single element. It is heated at "high" until it reachers 80°C. Then, the heat is turned down 25 percent and the block is left on the element for another 15 minutes. The tester then records the energy consumption, the time the test takes and the final temperature of the aluminum block. This test is repeated for every element.

List of models : cooktops

Ovens:
The aluminum test block is placed in the centre of the oven. The oven is heated to the normal baking temperature and remains on for one thermostat cycle (until the indicator light switches on again) after the temperature of the block reaches 130°C above its initial room temperature. The tester then records the energy consumption, the time the test takes and the final temperature of the aluminum block.

If the oven has a forced convection setting, this test is repeated using that setting. If the oven has a self-cleaning setting, the energy used during each of four self-cleaning cycles is measured and added together. The clock and controls are turned off during testing but are measured separately and added to the total.

List of models : ovens

Calculating the EnerGuide Rating
There is no simple calculation to show annual energy consumption. However, the amount of electrical power used and the cooktop and oven temperatures are all included in calculating the EnerGuide rating.