This classic simple flatbed dryer was developed in Vietnam. It can be constructed in 4-ton (SGH4) or 8-ton (SGH8) configurations.
Capacity: 4 (SGH4) or 8 tons (SGH8) per batch depending on configuration
Crops: paddy, maize
Drying time: reduce moisture by about 1.5% per hour; 4 ton batch of paddy dried from 25% to 15% in 9-11 hours
Fuel: generator or electricity connection for fan and additional biomass furnace for heat
Performance considerations: grain needs to be mixed by hand; cover over the dryer allows use in more weather conditions.
Ease of construction: no technical expertise required
Technical specifications and further information available from IRRI