Improving energy efficiency of rental housing

Modern cities development is a conscious distribution of priorities. The ecology and resource conservation problems are becoming more and more relevant, and when the city's housing stock is managed, it is necessary to reduce the negative impact on the environment. The aim of the study is to provide an economic feasibility for the construction and the energy-efficient apartment building operation that can serve the needs of current and future generations, and also reduce the carbon footprint through sustainable consumption of electricity and water in domestic buildings. The studying object is an apartment building, in which the introduction of energy-efficient systems is proposed: rainwater harvesting, solar electric plant. During the calculations the questionnaire method, the retrospective indicators of mathematical analysis, the net current value (NPV) method, and the discounted payback period (DPP) method were used. The calculated results showed the effectiveness of the rental housing operation in Kazan (Russia). The payback period will continue for 8.27 years. The practical implementation of the results opens up opportunities for solving the problem of saving natural resources and reducing the carbon footprint of our cities