For efficient airflow, the True TAC-14GS-LD open-air merchandiser has a perforated interior back wall. The condenser fan motor reverses directions during the defrost off-cycle to keep the condenser coil clean, improving performance and cold holding temperatures. The refrigeration system maintains even temperatures between 35 and 40 degrees Fahrenheit, and the operator can set a temperature in that range. To ensure consistent cooling, the self-contained capillary tube system controls the flow of R134A refrigerant.