The aim of the work is to explore suitability of Latvian environment to the usage of solar collectors system. For the attainment of objective monotype house will be modeled, the house will be equipped with the combined solar heat system, which will be placed in different regions. There are diverse amount of sunny days in different regions, as well as diverse average temperature, wherewith the amount of heat differs. For the modeling of building, modeling program model of solar collectors will be used, which is provided for several solar heat systems, inter alia for the calculation of combined solar heat supply system and for the solving of several relevant tasks. Wherewith results are achieved, after analysis of results it is theoretically possible to clarify suitability of specific system to specific place.