a reverse air flow oven for symmetrically heating product inserted within a heating chamber in the oven . the oven includes duct work configured symmetrically about the heating chamber , and a fan provides continuous circulation through the duct work and the heating chamber . the duct work also includes a pair of doors having complimentary configurations so that in one configuration , the air flow is in a first direction , and in the complimentary configuration , the doors cause air flow in the opposite direction . further , a perforated plate regulates and equalizes air flow across the heating chamber and includes valve plates for controlling a build up of static pressure within the heating chamber .