The answer to 'how long will heat exchanger last' is that a typical residential heat exchanger will last 10-15 years with proper maintenance. Heat exchangers are critical components in furnaces and boilers that transfer heat from the combustion process to the air or water that is distributed throughout the home. Over time, the metal in the heat exchanger can corrode and develop cracks or holes, reducing its efficiency and potentially causing dangerous carbon monoxide leaks.
To maximize the lifespan of a heat exchanger, it's important to have the furnace or boiler serviced annually by a qualified HVAC technician. They can inspect the heat exchanger for any signs of wear and tear and clean the unit to ensure optimal airflow and heat transfer. Homeowners should also change the air filter regularly and avoid running the system excessively to reduce stress on the heat exchanger.