What is the typical lifespan of a gas furnace with proper maintenance?

The typical lifespan of a gas furnace with proper maintenance is generally considered to be 15 to 30 years. This range reflects the durability and longevity of modern gas furnaces, especially when they are regularly serviced and maintained. Regular maintenance can include tasks such as cleaning or replacing filters, checking the heat exchanger, ensuring the blower motor is functioning properly, and inspecting the overall system for any wear and tear.

By adhering to a consistent maintenance schedule, homeowners can greatly enhance the efficiency and performance of their systems, potentially extending their lifespan toward the higher end of that range. Gas furnaces made with quality materials may reach or exceed 30 years under optimal conditions, but it's important to remember that various factors—such as usage, environmental conditions, and local codes—can affect this lifespan.

The other options suggest shorter lifespans, which do not align with the expected longevity of a properly maintained gas furnace in residential settings. For instance, while a furnace may start to exhibit issues around the 10 to 15-year mark, regular maintenance can significantly prolong its operational life.