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If every gas-heated home were properly caulked and weather-stripped, we'd save enough natural gas each year to heat about 4 million homes.

To increase efficiency and prolong life of air conditioners, change the filters at least monthly during the cooling season. Have the unit professionally cleaned and serviced annually.

Keep your air-conditioning unit cool by shading it with trees, shrubs, or a canopy to get more efficient cooling.

Using ceiling fans to circulate air makes you feel cooler, so you can raise the thermostat 8 or 9 degrees, thus saving money. If every household raised air-conditioning temperatures just 6 degrees, we would save the equivalent of 190,000 barrels of oil every day.

If every household in the U.S. lowered its average heating temperature only 6 degrees over a 24-hour period, we would save more than 570,000 barrels of oil per day.

Clean coils on the back of the refrigerator to improve efficiency by as much as 30%.

Close your refrigerator on a dollar bill. If you can easily pull a dollar bill past the door seal, the seal needs to be replaced.

Use compact fluorescent light bulbs wherever possible. The original investment is greater, but they last for years.