A convection oven having a vapor collection system; water injection system; easily accessible electrical components; and a variable-speed, reversible blower is disclosed. In one implementation, an apparatus includes a receiving unit configured to receive a selection of displayed content from a user. The vehicle hood structure of the present invention makes it possible to release a coupled state between the link member and the hood according to need, and, facilitate an operation of re-coupling the link member and the hood. The passage has a recess therein that receives a portion of the swing valve in its open position to improve the flow of exhaust gases through the passage.