The aim of this graduation theses was to devise design for ventilation, heating and cooling of enlarged hall and repair shop in Dunajska Streda. Hall is one - story, two - bay facility with two annexes. The cooling, ventilation and heating solution was insured by decentralized sources without active – cooling, designed by Hoval. The main ventilation exchange Vhyg = 10 534 m3/h is ensured by two units Hoval RoofVent® LKW-9 mounted on the roof of the boulding. Additional four suplementary units Hoval TopVent® MH-6 located under the roof, cover air exchange in areas, where the two main units have insufficient reach. Main function was to design ventilation of warm – air heating for two – bay facility with cold type hall, during cold seasons. For heating and cooling of annexes a multisplit system was designed with external unit (MS-E42AI) air – air designed by Sinclair. Ventilation which is located on the foreftont facade is supplied by roof construction with vents for intake and exhaustion of air. In conclusion we recap pros and cons of designed decentralized system.