The answer to 'how to clean inspection' is to regularly clean and inspect your HVAC system's air filters, coils, and vents. This helps maintain optimal airflow and efficiency, and can extend the life of your system.
Start by turning off power to the unit and removing any access panels. Carefully vacuum or brush away dust and debris from the air filters, being careful not to damage them. Check the coils and use a coil cleaning solution and soft brush to remove any buildup. Wipe down the vents and grilles to keep airflow unobstructed. It's recommended to clean the system every 1-3 months, or as needed based on usage and environmental conditions.