Wood drying is done in a chain conveyor oven. The boards are loaded onto the conveyor and as they move through the drying oven, heated air is delivered through a fully enclosed, pressurized supply duct that is above (or above and below) the boards. The ducts have tapered nozzles that impinge air directly onto the surface of the boards while they travel on a chain conveyor. Wisconsin Oven designs and manufactures chain conveyor ovens for drying primer, sealer and finish coatings on wood and cement board trim and panels. The wood drying ovens utilize a chain conveyor system and high velocity convection air technology to efficiently dry the boards.