Q: What are the most common mistakes people make in trying to save energy around the house?
A: Some common mistakes include:

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  Purchasing a furnace or air conditioner that is incorrectly sized for the home's need.

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  Not getting the ducts checked for leaks when installing a new heating and cooling system.

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  Thinking that only attics need insulation. Floors over basements or crawl-spaces, walls and windows also need insulation.

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  Not using ceiling or portable fans to improve comfort in the cooling season. These devices use very little electricity. Using fans allows air to circulate around the house, making it feel cooler without having to run the air conditioner as frequently.

Q: What is the biggest use of electricity in a house?
A: Typically, it's the central air conditioning. Although only used for a few months out of the year, the cost of running an air conditioner tops the annual cost of a refrigerator - the second largest electricity consumer in most homes.

If your refrigerator is more than 10 years old, consider replacing it. Older refrigerators are typically two to three times more expensive to run than a new unit.

Q: Can a programmable thermostat really reduce my heating and cooling consumption?
A: Yes, by as much as 10-15 percent in some cases IF it is properly programmed. You should enter a schedule designed to ensure the heating and cooling systems do not run when they aren't needed and are set back when the comfort needs are more flexible.

Q: At what temperature should I set my electric hot water heater?
A: Usually, water heaters have three settings - high (160 degrees), medium (140 degrees) and low (120 degrees). Most people have their heaters set on medium. You should consider lowering the thermostat to 120 degrees. For every 10-degree reduction, you can expect to save 3 to 5 percent.

Q: Should I leave my computer on all day, or turn it off when I'm not using it?
A: Leaving a typical computer on all day would cost about 21 cents/day. This may not seem like a lot, but over a year, it adds up to close to $75.

Q: What is a CFL?
A: CFL stands for compact fluorescent lamp, and it is a small fluorescent light bulb that uses 75% less energy than a traditional incandescent bulb. It can be screwed into a regular light socket and lasts up to ten times longer.