The length of the firewood can be 1-4 meters. In the case of the Szakoly reception point, the thickness (diameter): 5-36 centimetres, in the case of Ajka and Pécs reception points, the maximum thickness is 55 centimetres. The supplied firewood may not contain large amounts of solid dirt (e.g. mud) or material that endangers the operation of the shredder (e.g. metal, stone). In the case of firewood, the sap stain and rot may not exceed 5%. In the case of logs, rotten part may not reach 50% and curving may not exceed 10 cm/meter.