Your home is the largest investment of your life. Apart from buying a house, you have to maintain the house which involves cost on a regular basis. Besides the initial cost, a home is a series of operating systems that use energy and by taking care of those systems in a proper manner you can save much of the cost. Your cost gets multiplied if the systems aren’t efficient, or if your home is over 10 years old, then perhaps you should think of updating those systems. New generations of Energy Star appliances, heating and air/systems, and environmentally friendly insulation can bring your cost down to a great extent. Most of the energy savings can be initiated with simple upgradation of appliances. The initial cost of upgrading may be on the high side but you can save a lot once you own an energy efficient home.