The answer to 'how long does air conditioner last' is that a typical central air conditioning unit lasts 15-20 years with proper maintenance. The lifespan of an AC unit can vary depending on factors like the quality of the equipment, how often it's used, and how well it's maintained by the homeowner.
Well-maintained air conditioners that receive annual tune-ups and filter changes can often reach the upper end of that range, while units that are neglected or used excessively may need replacement after 10-15 years. Proper installation by an HVAC professional is also crucial for maximizing the lifespan of your air conditioning system.