In Sweden, majority of cereal crops are dried using hot air dryers with common heat sources being heating oil, gas, or biofuels. The need for cereal drying is global to avoid risks of spoilage and quality deterioration due to fungal attacks and pest damage. Large amounts of energy are required for hot air drying and rising energy prices are increasing interest in energy-saving solutions. The problem that the innovation aims to solve is to reduce the drying costs of cereal crops. The proposed solution is based on utilising solar energy in combination with other energysaving technologies. The result is a hot air process that is reliable, cost-effective, and fossil fuel-free. Additionally, risks associated with the use of purchased fuels are eliminated. Samster has developed a hot air process with integrated energy recovery and utilisation of solar energy. The technology provides many benefits, from reduced operating costs and reduced CO2 emissions to a safer system with a lower risk of fire. Samster has developed several smaller dryers that have been used in test projects for drying various materials. The purpose of this project is to construct a full-scale prototype of the hot air process that will be operated in a real environment by a farmer for drying cereal crops. The prototype to be constructed in the project should be able to replace an oil burner used in an existing cereal dryer. The project is an important step towards future commercialization of the technology.