This project consists of heating, cooling and ventilation designs of a residential building.The given building has four floors with basement premises. The ground floor consists of a library, club tenants and private storerooms, while the upper four floors are used exclusively for residential purposes. Each floor comprises seven flats in six different types A, B, C, D and C1. The heat loss of the basement, as well as the residential area, is calculated according to the standard EN 12831 and in accordance with the standard VDI 2078 were calculated heat gains in the library and the club tenants. For the apartment area has been designed a radiator floor heating system and DHW on a gas condensing boiler. For each room sectional radiators have been designed and their number of articles have been calculated according to the heat needs of each room. The piping system is made out of hard copper piping in a classical two-pipe system. The project also consists of out-take ventilation systems for the sanitary and the kitchen in the apartments, and the sanitary in the basement.In the basement of the building is designed a HVAC system for the library and club tenants.For the in-take and preparation of fresh outside air, fan-coil units are used. Behind the building has been set a compression heat pump water-air, which is connected to both fan-coil units with copper pipes, which use water for giving or taking heat to the outside air which is brought in the library and the club tenants. The out-take ventilation was achieved with additional fans who are also set in the air canal.The descriptive documentation has also been made, which graphically displays each of engineered systems for heating, cooling and ventilation.