In this article, the object of the study are the types of recuperators used in air handling units in order to compare their efficiency and payback period. Heat exchanger-a heat exchanger of surface type for the use of waste gas heat, in which the heat exchange between the heat carriers is carried out continuously through the wall separating them. Depending on the temperature of the flows, their rotation speed and rotor speed, we determine the efficiency of the recuperator. Payback of the heat exchanger depends on the climatic parameters of the region, its efficiency, the type of coolant and ventilation mode during the day.

Keywords: heat exchanger, heat exchange, moisture exchange, cold exchange, coolant, plate, rotary, heat pump, efficiency, energy consumption, heater, payback

The centralized heating system does not have a particularly flexible operation. Often one can observe a situation where people in the middle of winter are forced to open windows so that the temperature in the room becomes more or less acceptable. The purpose of this article to consider advantage of use of automatic regulators, to disclose their principle of action and influence on hydraulic stability of a heating system.

Keywords: thermostatic valve, hydraulic stability, thermostat, room microclimate, hydraulic resistance, circulation rings, coordination of the heating system, radiator, room temperature, balancing

in this article we consider the thermophysical and sound-physical properties of window blocks of various designs used in buildings and structures. For practical research, some dependencies are offered that allow us to describe the various properties of window blocks in wooden, metal and plastic bindings

Keywords: thermophysical properties, sound-physical properties, translucent fences, window blocks