A basic unit for cryogenic food freezing and chilling, the Cold Front CryoVantage tunnel freezer maintains the quality attributes of a variety of products, which move through the unit on a continuous conveyor belt. Cryogen injected into the freezer contacts individual food product pieces, with automatic temperature control systems adjusting the injections to compensate for incoming product load and temperature variations. An internal fan system helps ensure evenly chilled products, while adjustable curtains at the conveyor entrance and exit prevent warm room air from entering the freezer.