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Home energy - Get efficient
Install an Energy Star programmable thermostat for $60 to turn down the heat when you sleep and raise it in the morning. (This makes climbing out of bed easier too.)

Be sure to change the air filter in your heating and cooling system at least every three months.

Potential savings: $220 a year

NEXT: Home energy - Slay the vampires

Last updated June 13 2008: 10:48 AM ET
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