Характеристики дымоотводящего сопла промышленного унифицированного рекуператора «Силал» м-i 115×460×860-05 и «Силал» м-ii 230×460×860-1,0

The paper contains a proposal to equip devices for regenerative heat usage with a subsonic converging nozzle with the purpose to reduce smoke content in the operational zone of heating and thermal furnaces applied at machine building and automotive and tractor industries. Calculation of nozzle channel part is given in the paper.