The ornamental design for a base of a dehumidificationassembly, as shown and described.
FIG. 1 is a front elevation view from the front side of a base of a dehumidification assembly;
FIG. 2 is a perspective view thereof from the front and right side;
FIG. 3 is a perspective view thereof from the front and left side;
FIG. 4 is a top plan view thereof;
FIG. 5 is a side elevation view thereof from the right side;
FIG. 6 is a side elevation view thereof from the left side;
FIG. 7 is a perspective view thereof from the rear and right side;
FIG. 8 is a perspective view thereof from the rear and left side; and,
FIG. 9 is a rear elevation view thereof.
The broken line showing of parts of the drawings is included for the purpose of illustrating use and environment and forms no part of the claimed design.