TL-2 model Direct burning furnace is consists of 6 parts: natural gas burner + inner tank + insulation box + fan +fresh air damper + control system. It is specially designed to support the left and right circulation drying room. For example, the 100,000 kcal model drying room, it is equipped with 6 fans, three on the left and three on the right. When the three fans on the left rotate clockwise, the three fans on the right rotate counterclockwise in a cyclic alternating manner, forming a relay, The left and right sides serve as air inlets and outlets alternately, taking out all the heat generated by full combustion of natural gas. It is equipped with an electric fresh air damper to supplement fresh air in coordination with the dehumidification system in the drying room/drying place. 4. Advantages/features 1. Simple structure and easy installation 2. Large air volume and small wind temperature fluctuation 3. Stainless steel high temperature resistant inner tank, durable 4. Automatic gas burner, complete combustion, high efficiency. (After setting up, the system can control the ignition+cease fire+temperature adjust automatic), 5. High-density fire-resistant rock wool insulation box to avoiding heat loss 6. High temperature and high humidity resistant fan with IP54 protection rating and H-class insulation rating. 7. left and right fans run alternately in cycles to ensure even heating 8. Automatically replenish fresh air