The ornamental design for a portableheater and air purifying unit, as shown and described.
FIG. 1 is a front top perspective view of a portable heater and air purifying unit showing my new design.
FIG. 2 is a front view of the face of the portable heater and air purifying unit of FIG. 1.
FIG. 3 is a right side view of the front face of the portable heater and air purifying unit of FIG. 1.
FIG. 4 is a top view of the front face of the portable heater and air purifying unit of FIG. 1.
FIG. 5 is a bottom view of the front face of the portable heater and air purifying unit of FIG. 1.
FIG. 6 is another front top perspective view of front face of a portable heater and air purifying unit of FIG. 1, but showing its adjustable air flow grill in a tilted up direction; and,
FIG. 7 is another front top perspective view of front face of a portable heater and air purifying unit of FIG. 1, but showing its adjustable air flow grill in a tilted down direction.
Features shown in dashed lines do not form part of the design.