Gas furnaces generally last longer than standard electric furnaces, frequently achieving an operational lifespan of 15 to 20 years with proper annual maintenance, whereas electric furnaces often experience heavier wear on electrical heating elements around the 12 to 15-year mark. However, the overall longevity of any furnace depends far more on the quality of the initial installation, frequency of air filter replacements, and whether the unit receives routine professional inspections than on whether it runs on natural gas or electricity.
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