A refrigerator appliance including a sealed system for cooling air in a cabinet is provided. The cabinet includes a liner with a plurality of walls defining a chilled chamber. Within the plurality of walls, the liner defines an inlet, a plurality of airflow delivery conduits in flow communication with the inlet, and plurality of orifices connecting the plurality of airflow delivery conduits to the chilled chamber such that chilled air from the sealed system is distributed throughout the chilled chamber via the plurality of airflow delivery conduits.