The answer to 'when to replace inspection' is that HVAC systems typically require an annual inspection and tune-up to ensure optimal performance and energy efficiency. Most manufacturers recommend replacing the inspection and filter every 12 months, or more frequently if the system is used heavily or in a dusty environment.
An annual inspection by a qualified HVAC technician will check the system's components, identify any potential issues, and perform necessary maintenance or repairs. This helps extend the lifespan of the equipment and prevent more costly breakdowns down the line. Replacing the air filter as recommended is also crucial, as a dirty filter can reduce airflow and system efficiency.