On arrival, turned system on and listened for examples of loud noise or whistling. Noticed that the system was spinning fan up high to overcome static. Measured duct system static pressures and found that the air media filter was causing airflow restrictions. Recommended replacing media filter to improve airflow static. Also taped the seam between 1" filter door and main cabinet door to help seal system from air leakage. This improved the situation, but new filter media is still required to fully solve the issue. Customer states he will order filter replacements himself.