Know when to replace your appliances.
If your furnace, air conditioner or other major appliances are more than 10 years old, it may make sense to replace them with newer, more efficient models. Americans spend an average of $1,900 on energy every year. Buying newer, Energy Star appliances can save you at least $30 a year.
For instance, replacing a pre-1994 dishwasher with a new Energy Star model will save you about $30 a year in energy costs. Replacing your pre-1994 washing machine with a new Energy Star model would save you about $110 a year.