The answer to 'how long will heat exchanger last' is that a properly maintained heat exchanger can last 15-20 years on average. Heat exchangers are a critical component of your HVAC system, responsible for transferring heat from the combustion process to the air that circulates through your home. With regular professional maintenance and cleaning, a heat exchanger can provide reliable, efficient heating for many years.
However, factors like the age of the HVAC system, usage patterns, and environmental conditions can impact the lifespan of a heat exchanger. Older systems, systems that run frequently, and those exposed to corrosive elements may see shorter lifespans of 10-15 years. It's important to have your heat exchanger inspected annually by an HVAC technician to ensure it is operating safely and efficiently.