A heating wall panel comprising: - a first board; - a second board adjacent to the first board; - wherein within the first board there are installed: - a heating line arranged in two layers (2A, 2B) in a manner coplanar with two outer surfaces of the first board, wherein the heating line in the first layer is arranged in a form of a meander and has a length greater than in the second layer; - an cold water line and a hot water line arranged one above another and fixed by means of tees (5, 6) to ends of the heating line; and - an upper electrical installation duct and a lower electrical installation duct extending from a first side to a second side of the first board between the first layer and the second layer of the heating line; - and wherein the second board comprises: - in the lower part of the second board at the sides of the second board, inspection hatches (7A, 7B) having a form of board fragments delimited from the rest of the board surface by hatch indentations made in the surface of the second board that is adjacent to the first board; and - at a distance (d) from the longer edges of the second board and in parallel to the longer edges of the second board, side indentations made in the surface of the second board that is adjacent to the first board. - a first board; - a second board adjacent to the first board; - wherein within the first board there are installed: - a heating line arranged in two layers (2A, 2B) in a manner coplanar with two outer surfaces of the first board, wherein the heating line in the first layer is arranged in a form of a meander and has a length greater than in the second layer; - an cold water line and a hot water line arranged one above another and fixed by means of tees (5, 6) to ends of the heating line; and - an upper electrical installation duct and a lower electrical installation duct extending from a first side to a second side of the first board between the first layer and the second layer of the heating line; - a heating line arranged in two layers (2A, 2B) in a manner coplanar with two outer surfaces of the first board, wherein the heating line in the first layer is arranged in a form of a meander and has a length greater than in the second layer; - an cold water line and a hot water line arranged one above another and fixed by means of tees (5, 6) to ends of the heating line; and - an upper electrical installation duct and a lower electrical installation duct extending from a first side to a second side of the first board between the first layer and the second layer of the heating line; - and wherein the second board comprises: - in the lower part of the second board at the sides of the second board, inspection hatches (7A, 7B) having a form of board fragments delimited from the rest of the board surface by hatch indentations made in the surface of the second board that is adjacent to the first board; and - at a distance (d) from the longer edges of the second board and in parallel to the longer edges of the second board, side indentations made in the surface of the second board that is adjacent to the first board. - in the lower part of the second board at the sides of the second board, inspection hatches (7A, 7B) having a form of board fragments delimited from the rest of the board surface by hatch indentations made in the surface of the second board that is adjacent to the first board; and - at a distance (d) from the longer edges of the second board and in parallel to the longer edges of the second board, side indentations made in the surface of the second board that is adjacent to the first board.