Patent ID: 7798138

Claim:
A convection oven comprising: an indirect heating chamber formed by at least one indirect heating channel fluidically coupled between an input port and an exit port; a housing forming an oven chamber, wherein the indirect heating chamber is disposed adjacent a bottom wall of the oven chamber, and the oven chamber and the indirect heating chamber are fluidically coupled to form part of a closed circulation path; an air circulator adapted to circulate air through the circulation path; and a direct heating chamber adjoining the indirect heating chamber at a heat exchange interface, the direct heating chamber including at least one direct heating channel adapted to direct heat across a substantial portion of the heat exchange interface, wherein the at least one direct heating channel winds along a first circuitous path across the heat exchange interface; a fuel burner adapted to generate heat, wherein heat from the fuel burner is transferred to the indirect heating chamber through the heat exchange interface, wherein the at least one indirect heating channel winds along a second circuitous path across the heat exchange interface.