Home Energy Use According to the U.S. Department of Energy, the typical U.S. family spends $1,300 a year on home energy bills, and some of that energy is wasted. Heating, ventilating and air conditioning units are inefficient, windows leak conditioned air, and appliances devour energy. For more information on conserving energy and saving money on energy costs, visit our Safety & Savings section at, where you can find helpful tips for all seasons, an online energy audit, and much more. Usage Worksheet Energy Audit