Room to Room Fan

FIG. 1 is a front, left, top perspective view of a room to room fan, showing my new design; FIG. 2 is a rear, right, bottom perspective view thereof; FIG. 3 is a rear, right, top perspective view thereof; FIG. 4 is a front elevational view thereof; FIG. 5 is a rear elevational view thereof; FIG. 6 is a left side view thereof; FIG. 7 is a right side view thereof; FIG. 8 is a top plan view thereof; and, FIG. 9 is a bottom plan view thereof. The dashed broken lines in the figures are for the purposes of illustrating portions of the room to room fan and form no part of the claimed design.