Aeration cooling creates cool, uniform conditions throughout the grain to preserve grain quality, restrict or prevent mould growth and slow or stop insects breeding. Mould and insect development is slowed at temperatures below 200C and most insects stop reproducing at temperatures below 150C. Unlike aeration drying, aeration cooling can be achieved with airflow of 2-3 litres of air per second per tonne of grain and is best managed with an automatic aeration controller. For more information on how to manage fans for cooling see ‘Aeration cooling for pest control’ or Aerating stored grain, cooling or drying for quality control’