Sauna heater

A sauna heater, comprising:

• a housing including a top board, a bottom board, a front board, a rear board, a left board, and a right board wherein the top board, the bottom board, the left board, and the right board each have a plurality of spaced slot members, and the bottom board has two holes;
• a heating device including a plurality of plate-shaped heating elements having four sides fastened in the slot members of the top board, the bottom, the left board, and the right board respectively so that the heating elements are equally spaced in the housing, wherein each of the heating elements include a heating layer, a first insulator layer, two parallel conductive strips, and a second insulator layer;
• wherein the heating layer is secured onto the first insulator layer for electricity conduction and heat transfer;
• wherein the first insulator layer is configured to protect the heating layer and transfer heat so that the heating layer is configured to uniformly transfer heat;
• wherein the conductive strips are secured onto two sides of the heating layer respectively and configured to conduct electricity;
• and wherein the second insulator layer is secured onto the heating layer for achieving thermal insulation;
• and
• a convection device including two fans on an underside of the heating elements wherein the fans are disposed in the holes of the bottom board respectively;
• and wherein the fans are vertically aligned with the heating elements.