generally horizontal orientation upon top oven rack 14 and blows air down through the top oven rack 14 and over the food f in container c fig2 shows various elements of the air circulator 20 in perspective view circulator 20 includes an outer housing designated generally by the numeral 30 the housing includes a base 32 and a cover 34 the cover 34 has a round flat central support member 36 a peripheral rim 38 a plurality of bridging members 40 and air intake openings 42 between the bridging members 40 located at the center most point of the central support member 36 is an annular opening 37 visible through the air intake openings 42 is a portion of the inner housing 70 which projects downwardly from and is secured to the central support 36 of the cover 34 also partially visible through the air intake openings 42 is a portion of fan blade 60 fan blade 60 rotates within the enclosure formed by the base 32 and the cover 34 between the inner housing 70 and the base 32 the structure of the base 32 is shown in greater detail in fig3 the base 32 also includes a central support member 44 a.