The way you cook is also key to deciding which type of range cooker to choose. No-frills heat storage ranges such as Agas retain heat they have gradually built up and generally have two ovens without temperature controls - the hot oven is for roasting and baking, the cool one for slow cooking/keeping warm.

The standard 60cm oven has been joined by various other sizes. Now consumers can choose from 60,70 and 90cm wide built-in single ovens. Always check the internal capacity shown in litres as well as the external dimensions.

You can also maximize the efficiency of appliances you already own through regular maintenance and tune-ups and system upgrades. Examples of some things that you can do are:

• Check air filters in heating and cooling systems monthly during the seasons they are in use and clean and replace them as necessary.
• Clean air vents, baseboards, and radiators regularly and keep them unrestricted by furniture, carpets, or drapes.
• Release trapped air from hot water radiators once or twice a season by opening the valve until nothing but water comes out.
• Follow prescribed maintenance (e.g., maintaining certain water levels in steam heat systems).
• Install an insulating jacket on your hot water heater, insulate hot water pipes, and lower the water heater temperature.
• Clean refrigerator coils yearly and maintain internal temperatures between 36 degrees F (2.2 degrees C) and 38 degrees F (33 degrees C) for the refrigerator compartment and between 0 degrees F (17.8 degrees C) and 5 degrees F (15.0 degrees C) for the freezer compartment.
• Move the refrigerator if it is currently located near the stove or dishwasher.
• Regularly defrost refrigerators that do not have a completely automatic defrost capability to eliminate ice build-up on interior coils.
• Clean dryer filters after each use or as necessary.