Currently, the quality of the microclimate, which ensures comfortable living of people comes to the fore in comparison with energy saving. One consequence of the desire for energy conservation has been increased sealing of window openings, which has disrupted the natural ventilation system and worsened air quality in residential buildings, which is particularly dangerous in the face of increased coronavirus infection. The article justifies the need to replace the reconstruction and overhaul of residential buildings of natural ventilation systems, which do not provide the necessary air exchange in residential buildings with airtight windows, to autonomous mechanical ventilation exhaust systems with the recovery of the heat of the exhaust ventilation air in the conditions of Volgograd..

Keywords: energy conservation, energy efficiency, microclimate quality, natural ventilation, mechanical ventilation with recovery

This article offers technical solutions to reduce the degree of anthropogenic impact on the environment during finishing work. The results of the study of finely dispersed dust during finishing works are presented and analyzed.

Keywords: Air pollution, finishing works, technical solutions, particle analysis of dust, PM10 and PM2.5

The article discusses the issues of systematizing the examination of protected objects for compliance with fire safety requirements in problem-oriented control systems. Using the presented methodology, it is possible to solve problems of a different practice-oriented nature: from the actions of an independent expert during a fire audit to decision support in differentiating and ranking objects of protection by risk categories during the period of control and supervision activities by employees of the state fire service.

Keywords: fire safety, object of protection, conformity check, control system, inspection, expertise

The work is devoted to research on improving the mechanisms for managing fire hazardous events in the socio-economic system of objects and settlements. The simulation results make it possible to calculate the probability of a fire stopping at certain stages in each fire zone, as well as to estimate the relative probability of a fire hazardous event occurring in the territories under consideration.

Keywords: objects of protection, fire development, territories, residential sector, socio-economic system, modeling