Abstract: A dryer for drying various types of products such as food products and pet food. The dryer includes a frame structure, a conveyor disposed in the dryer, and a heating unit for supplying heat to the dryer. A plurality of relatively lightweight hygienic panels, including doors, is secured to the frame structure and form a part of the exterior of the dryer. The hygienic panels provide access to the interior of the dryer for cleaning and maintenance. Each hygienic panel is sealed so that moisture and air cannot enter the interior of the panel. Disposed inside each hygienic panel is a honeycomb panel and an insulating structure. The hygienic panel provides rigidity and strength to the hygienic panel and at the same time enables the panel to be of a relatively light weight construction.