The customer in the village of Banská Bystrica connected the MultiBio boiler to a combined boiler for DHW heating. It uses agro-pallets as fuel. According to his words, he put a grate into the boiler and burns even lumberwood. He has also tried the coal without any problems - a coal of coal size up to 1.5 cm. Also pellets from sunflower husks, oats and pellets from hay and straw. It is heating a family house with a floor area of about 280 m2. It has access to agri-materials and so we look forward to more information on the possibilities of using different fuels available in agriculture.