temperature of the primary refrigerated air band but below ambient temperature in a preferred arrangement a third air band designated by arrows c is maintained substantially across the open front of the display case this third air band is composed of ambient air drawn by means of a plurality of fans 76 preferably the same in number as fans 58 and 64 into a plenum chamber 72 defined by a housing 74 located on the exterior of the cabinet 10 plenum chamber 72 opens into an outlet 78 which is covered by an extension 71a of outlet grille 70 to direct air through outlet 78 and downwardly across the open front of the display case as indicated by arrows c this third air band is not recirculated through the case but exits outwardly of front panel 46 into the aisle area of the store so that the ambient air can warm the aisle for customer comfort as well as adding inertia to the total air curtain formed by the primary and secondary air bands in addition to the adjustable baffle 68 located in plenum chamber 62 there are a plurality of doors 80 pivotally mounted on an upper surface 27a of housing 27 see fig1 fixed to the l shaped baffle 68 preferably at or adjacent the corner of the 34 l 34 are levers.