Volatility and rising of fossil fuel price affected interest about solar energy usage in Latvia and partly desired to invest in alternative technologies. The aim of paper is to investigate the Latvian environmental propriety for solar interceptor systems. To achieve objectives in the modeling program is designed for family home project; a house will be equipped with the combination solar thermal systems. The model of program houses will be placed in different areas at different solar luminescence intensity. Modeling program has been designed to simulate the combination of solar heat supply system and to address more important tasks. Depending on the input data model make simulation considering of model virtual location. Consequently, the results have been achieved that is why theoretically possible to determine the suitability of scheme in a specific place.