CONTACT HEATER Russian patent published in 1999 - IPC

FIELD: individual heating systems. SUBSTANCE: furnace of contact heater is additionally provided with flow former of gaseous heat-transfer agent; combustion product receiver is mounted in lower portion of water jacket. Flow former is made in form of three-dimensional body whose outer surface may be provided with projections forming helical line or in form of spiral body mounted inside furnace or connected with its inner surface. EFFECT: improved transfer of heat from gaseous to liquid heat-transfer agent; removal of considerable amount of combustion products without additional devices. 6 cl, 2 dwg