DESC: The Summit 21 Cu. Ft. Frost Free Chest Freezer (model: SCFF220) is compact but powerful and UL-Sanitation Approved to meet ANSI-NSF 7 regulations for commercial use. This unit is the perfect choice for use by medical facilities, food service providers, restaurants, and institutional customers. An innovative electronic thermostat accurately controls fan-forced cooling inside, and a dynamic defrost system prevents frost build-up and ensures even cooling.