An air exchanger is part of a balanced ventilation system that introduces fresh air and exhausts stale air, helping to improve indoor air quality and reduce moisture buildup. These systems are engineered to last a long time: a well‑maintained air exchanger typically provides about 15 to 20 years of service.
Average lifespan of an air exchanger
The heat‑transfer core and motors inside an air exchanger are designed to operate continuously. Homeowners can expect roughly 15 years of reliable performance from a quality unit. In favorable conditions and with proper maintenance, some systems may continue functioning for two decades.
What affects how long an air exchanger lasts
Dust and moisture are the primary threats. Without regular filter changes, dust accumulation can reduce airflow and strain the motor. High indoor humidity or cold conditions can cause condensation within the unit, potentially corroding metal components. Installation quality and proper sizing also influence longevity: units that are too small for the space may run constantly and wear out sooner.
Signs an air exchanger needs replacing
Decreased airflow, unusual noises, or a failure to remove moisture and odors indicate that the fan or core may be compromised. If filters clog quickly despite regular replacement or if you notice rust inside the housing, components may be deteriorating. Frequent breakdowns or repairs to motors and controls are also signs that the unit may be nearing the end of its life.
How to make an air exchanger last longer
Check and replace filters according to manufacturer recommendations, typically every three months. Keep intake and exhaust vents clear of obstructions such as snow, leaves, or debris. Ensure the condensate drain is clean to prevent water buildup. Have the system inspected annually to clean the core and verify proper airflow and balance.
When replacement is necessary
Consider replacing your air exchanger when major components fail after 15 or more years of operation or when repair costs approach half the price of a new system. Newer models often offer improved efficiency and energy recovery, which can reduce heating and cooling costs over time.