Air treatment system

FIG. 1 is a perspective view of the air treatment system of the new design;

FIG. 2 is a right side elevational view thereof, the left side elevational view being identical thereto;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The claimed portions of the air treatment system are shaded. FIGS. 1-6 show features of the air treatment system in phantom lines. These features are shown for environmental purposes and do not form any part of the claimed design. Further, all phantom lines bounding a shaded portion of the design form the boundary of the design, with the bounding phantom lines forming no part of the claimed design.