A heat exchange hot air furnace is a type of hot air generator that uses coal or biomass fuel combustion to heat the air. It can provide clean, high-temperature air for the drying of food and medicine.

The heat exchange type hot air furnace is composed of a coal feeder, a grate reducer, a chain belt grate, a grate blower, a high-temperature heat exchanger, and a smoke exhaust fan. The heat exchanger uses different heat-resistant materials and enhanced heat transfer fins according to different outlet temperatures, which can heat the air to 550 ℃

Hot air temperature stability ± 5 ℃