Setting your refrigerator temperature below 40 degrees is unnecessary and uses more energy.

Lowering the thermostat will enable your heating system to use less energy, and is a worthwhile consideration in circumstances where there is little impact to comfort.

If a limited amount of cooling is needed and the outside air temp is acceptable, a whole house fan is a very economical solution - low initial expense and low running costs. A whole house fan is typically installed in the ceiling in the middle of the house, and is operated by opening windows and doors and turning on the fan; cool air from outside is drawn into the house and the existing warm air is exhausted up through the roof.

Some freezers lose much of the coolness they make and do not make efficient use of the electricity they consume. This is especially true of older models, and important in homes with large numbers of people.

Some water heaters lose much of the heat they consume. This is especially true of older and lower cost models, and important in homes with large numbers of people.

Glass doors can lose heat in the winter, and gain heat in the summer. This can be prevented by replacing them with multipaned and insulated frame glass doors.

Some coolers do not make efficient use of the electricity they consume.

Raising the temperature settings of your thermostat will enable your air conditioner to use less electricity, and is a worthwhile consideration in circumstances where there is little impact to comfort.

Electric clothes dryers are up to four times more expensive to run than gas dryers. The running cost difference is much greater in homes with large families.

Blocked intakes and vents cause electric fan driven systems to work harder and heating and cooling systems to work longer. Moreover, blocked intakes and vents can cause combustion systems to build up unsafe amounts of explosive or harmful gasses.