Trays: • Stainless Steel perforated trays Lighting: • Interior illumination for working area. Insulation: • 3” Thick CFC free PUF Insulation. Heating System: • U shaped S.S. Nichrome wire air heaters. Humidity Sensor (Optional): • Direct Digital read out of % RH with a electronic capacitance type sensor Observation Door: • Inside see through unbreakable acrylic door