Humidifier tub for humidifier for positive airway pressure delivery device

FIG. 1 is a perspective view of a humidifier tub for a humidifier for a positive airway pressure delivery device according to 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 left side view thereof; and,

FIG. 6 is a right side view thereof.

The closely spaced broken lines of the humidifier tub represent environmental structure and do not form a part of the claimed design. The more widely spaced broken lines within the circular openings in the top of the humidifier tub in FIGS. 1 and 4 represent the border between claimed and unclaimed subject matter and do not form a part of the claimed design. None of the broken lines form any part of the claimed design.