This wastes heat and energy. Don't use an oven as a room heater. Use portable appliances for specialized cooking tasks. They generally use less energy than an electric range. Using a microwave oven provides a fast and efficient way to prepare food.
Foods cook in a fraction of the time required by conventional cooking.
Save energy by using a pressure cooker. It cooks foods in about two-thirds less time than conventional methods. Scrape dishes instead of thoroughly rinsing before placing in the dishwasher. Avoid rinsing dishes one at a time under running water. Rinse all together in the sink.