FIELD: construction industry, in particular, concreting of horizontal constructions. SUBSTANCE: device has a source of heat energy with reflectors mounted on a frame, the source of energy is made in the form of a gas header with nozzles and a hood with heat insulation located from above, connected to a Stearling engine through a heat-insulated pipe connection. On the side surface the hood has a hinged cover, it is installed for rotation, and flexible inserts are installed around the edges of the preheating zone for vertical movement. EFFECT: enhanced efficiency of heat-exchange processes and reduced power consumption. 4 cl, 2 dwg
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