Reduce nighttime winter temperature by at least 5 to 10 degrees. In the cold months, open draperies and blinds or roll up shades to let in the sun's heat. If you have a garage door, close it in the winter. Use window and attic fans for cooling in summer when outside temperature and humidity are below inside house temperature and humidity. Turn, pull, or push damper to close off flue when you are not using the fireplace.
Lighting Turn off unnecessary lights, indoors and out.
Keep lighting fixtures clean. Reduce lighting levels to minimum for task to be performed. Use bulbs with lower wattage in halls, stairways, and other areas of general illumination. Select energy-efficient light bulbs. Use fluorescent lighting for maximum light from electrical energy used.