When should I consider replacing my furnace, and what signs should I be vigilant for that indicate it’s time to bid farewell to my aging heating system? As the temperature begins to drop and the winter chill sets in, many homeowners find themselves pondering the longevity and efficiency of their furnaces. Are there specific telltale indicators that suggest my furnace is nearing the end of its operational life? Perhaps unusual sounds like rattling or booming might be symptomatic of deeper issues? What about arising energy bills that seem disproportionately high, hinting at inefficiency? Additionally, how much repair history is too much? Could a consistent need for maintenance be a red flag? Should I also factor in the age of the unit itself, given that most furnaces have a typical lifespan of around 15 to 20 years? Navigating the complexities of furnace replacement can indeed feel daunting, so what considerations should I keep at the forefront of my decision-making? Is it merely a practical matter, or does the comfort and safety of my household also play a pivotal role in this significant choice?