FIG. 1 is a top front perspective view of my new design for a dual fan air circulator;
FIG. 2 is an enlarged front elevation view thereof;
FIG. 3 is an enlarged right side elevation view thereof;
FIG. 4 is an enlarged rear view thereof;
FIG. 5 is an enlarged bottom plan view thereof; and,
FIG. 6 is an enlarged top plan view thereof.
The broken line showing of the fan grills, buttons and apertures is included for the purpose of illustrating portions of the dual fan air circulator and forms no part of the claimed design.