This thesis presents the project solution for the reconstruction of the restaurant Hajdučke Vrleti's HVAC system. The restaurant is located at the area of Split and is a part of Hajdučke Vrleti motel. The restaurant has a dining area, two seprated smoking zones, two toilets, a kitchen and a keeping room. The task is to design the cooling system and ventilation for the restaurant, two smoking zones and the kitchen as well as for the sanitary rooms. The motel has installed the hot water heating system where the rooms are heated by radiators. As a heat source, the pellet boiler is used. The heating temperature regime is 80°C feed temperature at heater outlet and 60°C return temperature at heater inlet. The radiator heating needs to be inspected for the restaurant. The ventilation and cooling requirements are met by applying the central air system with one supply duct that supplies air by varying the air flow rate and contains the VAV (Varijable Air Volume) valves. The air conditioning system is designed with a plate heat recovery unit. Within the sanitary rooms the local exhaust ventilation is applied, while the existing kitchen hoods are used in the kitchen. The tables with the calculations and results are given in the appendix of the thesis. Furthermore, the drawings that show the equipment arrangement and the heating, cooling and ventilation installation schemes together with the automatic control schemes are also part of the appendix.