Energy-efficiency improvements not only make your home more comfortable, they can yield longer-term financial rewards. Reduced utility bills more than make up for the higher price of energy-efficient appliances and improvements over their lifetimes. In addition, the improvements should increase the value of your home. Since heating and cooling your home account for about half your utility bill, upgrading your home's insulation and sealing air leaks may be the fastest and most cost-effective ways to reduce energy waste, make your home more comfortable, and get the most of your energy dollars.