Most homeowners in Orlando, and elsewhere, don’t look at heating replacement as an opportunity, but it is on several levels. One way replacing a failing heating system is a great opportunity is by increasing your energy efficiency. It stands to reason that if you are replacing a heating system that is 10+ years old, there’s no doubt you will increase your home energy efficiency simply by purchasing and using an updated heating system. But if you really want to know just how efficient a particular furnace or boiler system will be in your home, the best thing to look at is the AFUE rating.