Improving the function of your furnace can make your home more efficient — and help lower energy bills. Do you know what an AFUE rating is? It stands for annual fuel utilization efficiency, and it measures how efficient the appliance is in converting the energy in its fuel to heat over the course of a year. The higher the AFUE, the more productive your furnace, and the greater your savings. Visit the Sears Home Services blog to figure out how you can save money on your next heating bill.