A method for manufacturing an oven includes a) providing the muffle defining a cooking chamber (5); b) providing a channelling (10) for conveying air; c) associating to a rear wall (5c) of the muffle (5) a first fan (30) for ventilation of the cooking chamber; d) associating to the channelling (10) a second fan (20) for forcing air into the channelling (10); e) associating the channelling (10) to an upper wall (5a) of the muffle (5). Step b) comprises shearing from a semi-finished product of a metal component (10a) of the channelling (10) a corresponding portion (40), so as to define an opening (23) for installation of the second fan (20). Step c) comprises using the portion (40) sheared from the semi-finished product of the metal component (10a) of the channelling (10) as a bracket for fixing the first fan (30) to the rear wall (5c) of the muffle (5).