Heavy frost overworks the the equipment. Keep the oven door closed when cooking. If you need to open it, close it quickly to reduce heat waste. When using the oven, you can make full use of its heat by baking extra meals such as casseroles and meat loaves, and freezing them for later use. After you've finished cooking, use the remaining oven heat to warm plates and rolls.
Ranges Make the pan size with the size of the cooking element or burner.
The bottom of all pans should be flat for efficient contact with the units. Tight-fitting lids retain heat and moisture in pots and pans. Try not to lift the cover too often. Prepare small meals with special appliances such as electric frying pans, toaster ovens, and broilers. Normally, they use less energy than a conventional range.