Abstract: A drying oven for curing paint applied to a vehicle comprising a housing, radiant heat panel located on the side walls of the housing, a conveyor for carrying a vehicle through the housing and a convection heater unit positioned at a height below the conveyor such that heat from the convection heater is directed onto the under floor of the vehicle passing through the housing on the conveyor. In a first embodiment, the convection heater unit includes a feed pipe positioned below the conveyor and a plurality of nozzles extending from the feed pipe for directing hot air onto the under floor of the vehicle. In a second embodiment, a plurality of heat ducts are located below and to the side of the conveyor, each heat duct having an opening directed at the under floor of the vehicle on the conveyor for directing hot air onto the under floor of the vehicle.