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 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 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 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 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 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 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 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 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 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 . <EOS>