Abstract
The paper investigates the issues of feasibility study of energy-saving measures. It is proposed to revise the traditional approach to assessing the efficiency of capital investments in the projects of reconstruction of residential facilities, aimed at implementation of energy-saving solutions. A special feature of an assessment of the efficiency of thermal modernization of buildings is the forecasting of future tariffs for energy carriers, the level of which directly depends on the macroeconomic situation both in the country and in the world, which makes the reliability of the estimate difficult. The author suggests using average forecasted tariff rates depending on the value of the discount rate, as well as the effect and payback period of costs not only for the investor, but also for the consumer of thermal energy, consisting in the amount of saving financial resources for the estimated operation period of thermal engineering measures.