Add to ORKGHeat sources are a daily part of our lives. The increasing demands for efficient, low-cost and eco-friendly heating of a family home can be satisfied with a heat pump. The main benefits include eco-friendly, efficient and unattended operations with low operating cost. This bachelor thesis provides information on how the heat pump works, what types exist and explains the concepts associated with them. Due to the decreasing power at low temperature, heat pumps are often installed in a bivalent connection with an additional heat source. The heat pump, like any other device, undergoes constant upgrades to improve the parameters and its function. In the final part of the thesis, a basic economic study of a new heat source for a model house is ca...