Preformed Quality Control check. Client did mention that the bedrooms upstairs were not getting as cold as the media room and play room. We addressed the issue by adjusting the ducts to allow adequate airflow to each of those rooms. Refrigerant levels are within operational standards. Client mentioned filters may need to be changed. Advised filters do need to be changed but client didn’t have any replacements. Unit cooling on departure. Filter 20x25x4 and 16x20x4