The ornamental design for a filterassembly for ventilator, as shown and described.
FIG. 1 is a front perspective view of a filter assembly for ventilator according to a first embodiment of our design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a right side view thereof;
FIG. 8 is a rear perspective view thereof;
FIG. 9 is a front perspective view of the filter assembly of FIGS. 1-8 in its preload condition relative to a sample ventilator; and,
FIG. 10 is a front perspective view thereof showing the filter assembly assembled to the sample ventilator.
The broken line showing of portions of the article and of the ventilator is included for the purpose of illustrating subject matter excluded from the claimed design.