Have your furnace tuned every two years. You will save about 1250 lbs of carbon dioxide and 10% on your heating bill. Also, during the winter or cooler months, add extra insulation to your water heater or purchase an insulating jacket. Set your water heater to 120 Fahrenheit. The water will still be hot, not scalding! The higher the temperature means, “Higher bill.” Doing this can save you about 30% a year on your water heating bill.