US Patent 8258435 Dual fan convection oven

A combination convection and radiant cooking appliance includes an oven cavity, broil and bake radiant heating elements, a convection cover defining a rear wall of the oven cavity, a back panel, and a dual fan convection heating system mounted between the convection cover and the back panel. Each combination fan/heater of the dual convection heating system includes a multi-speed fan and an associated electric heating element, with the fans being vertically disposed in the oven cavity. Controls are provided to enable a user to select between at least a bake mode, a no preheat convection bake mode, a rapid preheat convection bake mode, a preheat convection bake mode and a convection roast mode.