The answer to 'how long does HVAC system last' is that a well-maintained HVAC system can typically last 15-20 years, with some components lasting longer than others. The lifespan of an HVAC system depends on factors like the quality of the equipment, how often it's used, and how well it's maintained through regular professional servicing and DIY cleaning.
For example, the average furnace lasts 15-20 years, while air conditioners and heat pumps usually last 10-15 years. The ductwork, thermostat, and other components may last even longer with proper care. Regularly changing air filters, keeping the system clean, and addressing any issues quickly can help maximize the lifespan of your HVAC system.