Refrigerated appliance with ducted air flow

A refrigerated appliance comprising:

• a refrigeration system, an evaporating unit of the refrigeration system configured to supply air to an air plenum system of the appliance, the air plenum system configured to cool the appliance;
• a cabinet defining the air plenum system, the air plenum system defining an evaporator cavity, the evaporating unit received at least partly within the evaporator cavity;
• the cabinet comprising:
• a first refrigerated portion comprising:
• a first insulated enclosure defining an interior surface;
• and
• a rail duct received within the first insulated enclosure and defining an inward-facing surface and an outward-facing surface, the inward-facing surface defining a pan storage cavity, the pan storage cavity configured to receive at least one food pan, the rail duct defining openings in each of a rear wall and a front wall of the rail duct, the first refrigerated portion defining an intake air cavity between the interior surface of the first insulated enclosure and the outward-facing surface of the rail duct, wherein:
• the intake air cavity is in fluid communication with the evaporator cavity and the pan storage cavity,
• the intake air cavity is defined under and behind the rail duct, the intake air cavity defining a first portion below a bottom wall of the rail duct and a second portion behind the rear wall of the rail duct;
• the intake air cavity is configured to direct air from the first portion into the second portion and thereby pressurize and distribute the air throughout the second portion;
• and
• the intake air cavity is configured to direct all air into the rail duct through the openings in the rear wall and out of the rail duct through the openings in the front wall, each of the openings in the rear wall and each of the openings in the front wall defined in a portion of the rail duct below which the at least one food pan is configured to be supported;
• a second refrigerated portion positioned below the first refrigerated portion and comprising;
• a second insulated enclosure defining an interior surface and a base cavity configured to receive stored product;
• a roof duct received within the second insulated enclosure, the roof duct defining, at least in part, a communication air cavity, the communication air cavity being in fluid communication with each of the pan storage cavity and a return air cavity, the communication air cavity defined between the intake air cavity and the return air cavity, and the return air cavity being in fluid communication with the evaporator cavity;
• a rail inlet divider extending left to right along a length of the roof duct between the intake air cavity and the communication air cavity;
• and
• a closure device configured to selectively cover and limit leakage of air from an ambient environment to and from the second insulated enclosure.