Hot Water Boiler for Hot Water Mat

FIG. 1 is a perspective view of a hot water boiler for hot water mat, showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The details encircled by broken lines with a light gray wash shown in the drawings are for illustrating portions of the hot water boiler for hot water mat and form no part of the claimed design.