Ventilation System Adaptor Collar

FIG. 1 is a rear perspective view of a ventilation system adaptor collar showing the new design.

FIG. 2 is a front perspective view of a ventilation system adaptor collar showing the new design.

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a front elevational thereof.

FIG. 5 is a top plan view thereof.

FIG. 6 is a bottom plan view thereof.

FIG. 7 is a left side elevational view thereof; and,

FIG. 8 is a right side elevational view thereof.

The broken lines in the drawings depict portions of the ventilation system adaptor collar that form no part of the claimed design.