the port 52 into the plenum 56 and into the bottom area of the storage compartment 22 as well as return of warm air from the top area of the storage compartment 22 arrows b through the plenum 56 and port 52 and into the cooling unit 12 for subsequent re cooling and return to the storage compartment 22 the selectively removable cooling unit 12 according to one embodiment of this invention includes a condenser 58 positioned adjacent the front panel 40 and in communication with the intake 48 to draw fresh air into the cooling unit 12 the cooling unit 12 also includes an evaporator 60 positioned rearwardly in the cooling unit 12 as well as a fan 62 and a compressor 63 the fan 62 draws the air in the direction of arrow b from the plenum 56 into the cooling unit 12 for processing and returns as chilled air to the chilled storage compartment 22 duct work 64 adjacent to the cooling fan 62 keeps the chilled air separate from the air intake from the chilled storage compartment 22 a power cord 66 and associated coupling 68 are provided to power the cooling unit 12 the bulk head 70 beneath the storage compartment 22 and above the chamber 18 has a sloped lower surface 72 likewise an upper wall 74 of the cooling unit 12 is similarly sloped such that the height of the cooling unit 12 adjacent the front panel 40 is greater than the height of the cooling unit 12 adjacent the port 52 and back end of the cooling unit 12 the mating.