A properly maintained gas furnace manufactured by International Comfort Products (ICP)—including sister brands like Tempstar, Heil, Comfortmaker, and Day & Night—is engineered to deliver a reliable operational lifespan of approximately 15 to 20 years under normal residential operating conditions. Achieving this maximum durability depends heavily on regular annual preventative maintenance, timely monthly air filter replacements, and ensuring the system was correctly sized for the home during initial installation by a certified technician.
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