Which is the more efficient way to keep cool, turning on your AC or leaving your freezer door open? Well, if you have an older house, they’re probably about equal. Sloppy ductwork loses a lot of cool air, and older ACs are pretty more inefficient. You may install an Energy Star air conditioner and make use of programmable thermostats to save big on electricity.
Having this stuff will give you the benefits of saving some cold, hard cash. Replace a 10-year-old room AC with a new Energy Star model and save about $14/year. Use programmable thermostats and save about $100/year. Drapes also shutter and awnings can further keep out heat by up to 77%. And, lower cooling costs by 10-50% by planting hardwood trees on the east, west and south sides of the house.
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This is really a useful advice in keeping house cool! Tree also helps us to fight against global warming!