The effect of the climate change on heating and cooling energy needs and the delivered energy is analyzed for a typical floor of the Technical school Ruđer Bošković in Zagreb. The heating and cooling needs have been calculated for every hour in a year using the data for a typical meteorological year 2019. Energy simulations have been carried out using the computer program TRNSYS. It has been assumed that an air-water heat pump is a heating and cooling source of energy. The modeling of heating and cooling emitters in rooms and a distribution system were not within the scope of the analysis. Heat pump electricity consumption has been calculated using heat pump manufactures data and the algorithm developed in the MATLAB software. It enables the calculation of the electricity consumption for every hour in the year based on a variable coefficient of performance (COP) and an energy efficiency ratio (EER). The COP and EER depend on the outdoor air temperature, part-load ratio and supply water temperature. According to meteorological data, the outdoor air temperatures are predominantly higher during 2019, compared to the typical meteorological year. This has a direct impact on heating and cooling needs, as well as on the delivered energy. The simulation results indicate that there is no significant variation between year 2019 and typical year, regarding the energy for cooling. On the other hand, there are noticeable differences in the energy for heating. The delivered energy for heating is 6949 kWh for a typical meteorological year and 4826 kWh for year 2019. In addition, the delivered energy for cooling is 2651 kWh for a typical meteorological year and 3096 kWh for year 2019.