Your home’s HVAC system is an expensive investment. Perhaps this tempts you to put off a furnace replacement and choose to repair your outdated unit instead. Consider these factors when deciding whether to repair or replace: Age: A 12- to 15-year-old furnace is probably on its last leg and not worth repairing, especially if you have already poured money into several repairs over the past season or two. Investment cost: It costs more to replace than to repair, but consider the long-term investment cost of keeping your old furnace up and running. The knowledgeable HVAC contractors at Aire Serv can help you calculate your return on investment. Utility rates: By taking utility bills from past seasons and calculating future bills based on rising utility rates, you can determine how much it will cost to run your existing furnace this year. Compare that with the energy consumed by a new furnace at the same utility rates and see what savings you can expect from a furnace replacement.