A conveyor oven is provided, which has an oven housing having a frame with a top wall and side walls downwardly dependent from the top wall, and a substantially open bottom portion of the frame. A heat source heats the baking chamber in excess of 7000 F. An endless conveyor is used for continuous transport of foodstuffs through the baking chamber. The oven uses access dollies to insulatingly cover the bottom of the oven below the conveyor. These dollies can be unsealed and slidably removed to access the baking chamber without turning off the heat source or cooling the oven.
