The answer to 'lifespan of heat exchanger' is that a properly maintained heat exchanger in a residential HVAC system typically lasts 15-20 years. Heat exchangers are a critical component that transfer heat from the combustion process to warm the air circulated through your home. With regular maintenance and inspections by a qualified HVAC technician, most heat exchangers will provide reliable, efficient heating for many years.
However, factors like the age of the system, frequency of use, and exposure to corrosive elements can impact the lifespan. Older heat exchangers become more prone to cracks and leaks over time, which can compromise safety and efficiency. Homeowners should have their heat exchanger inspected annually to ensure it is functioning properly and safely.