When designing heating systems in private homes, the selection of equipment plays a key role. The use of software increases the speed, improves the efficiency of design and saves consumers' money. The subject of the study. Selection of pumping equipment using Valtec.PRG software for a heated floor system in a private one-story house. Materials and methods. The calculation uses standardized enclosing structures and the most popular interior solution - floor-to-ceiling windows in residential premises. For the calculation, a project of a one-story private residential building in St. Petersburg with dimensions in axes of 13.2 m x 13.2 m was selected. In the calculation, 3 sections of the underfloor heating system were considered. To determine the pressure loss on the most loaded circuit, it is necessary to sum up the losses in sections 1 - 2 - 3, while section 2 should be taken as the circuit with the greatest pressure loss. The most loaded circuit in this system is circuit No. 6 in the "Hall" room. When selecting a circulation pump for an underfloor heating system, two hydraulic characteristics were determined: the total flow rate in all network sections and pressure losses in the most loaded underfloor heating circuit. Results. The underfloor heating system was calculated and a circulation pump was selected for a private one-story house in St. Petersburg according to the obtained values of the total flow rate in all network sections and pressure losses in the most loaded underfloor heating circuit of the system. Conclusions. Correct selection of the pump ensures uniform heat flow and uninterrupted operation of the system.