Abstract: A portable air circulator is disclosed which rests on top of a radiator having a plurality of fins that are filled with a heated fluid. The air circulator has a casing and a fan. The casing includes a tray member which rests on top of the radiator fins and has a vent section with an opening facing the fins. A cap member of the casing forms a chamber with the tray member leading to the fan. The vanes of the fan direct a current of air from the cap member's vent portion through the vent section in the tray member at the radiator fins.