Convert the harvest you intend to retain into a storage target, allow for growth, and subtract usable existing space. Compare several bin diameters at the same level grain depth. Keep wet holding separate from dry storage. The planner uses geometric level volume. A manufacturer capacity chart may include a grain peak, compaction or a different capacity basis, so it will not necessarily match. Confirm the exact bin model, usable fill depth, floor height and grain properties before choosing a configuration.
Confirm model, serial/PIN range, region and installed components. External documents and media are provided by their publishers; Knopp Management is independent of these manufacturers.
Multiply bushels by the selected cfm/bu target to get required airflow. Then choose a fan that can deliver that airflow at the expected static pressure for the crop, depth, floor, transitions and ductwork. Horsepower alone does not establish delivered airflow. Deeper grain generally increases resistance. An aeration target for keeping dry grain in condition is not automatically sufficient for natural-air drying. Use manufacturer fan curves and the correct crop resistance data.
Wet grain accumulates whenever receiving exceeds drying. The planner follows that inventory through the receiving and drying day, then carries any unfinished grain into the next harvest day. A balanced dryer can catch up outside receiving hours. An undersized dryer leaves a growing daily backlog; simply adding a wet bin does not remove that bottleneck. The outage allowance estimates extra volume only. Safe holding time depends on moisture, grain temperature, condition and aeration.