HOT-WATER-TUBE BOILER Russian patent published in 1998 - IPC

FIELD: generators of heat working on solid fuel, gas, mazout for heating, ventilation and hot water supply under any climatic conditions. SUBSTANCE: boiler includes furnace 4 and convective heating surface 8 and 10 formed by frame construction of chambers 2 and walls 5, 6 and 11 changing to convective heating surfaces 8 and 10. Frame structure of chambers 2 is mounted in base 1 of furnace 4. EFFECT: reduction of aerodynamic drag; improved cleaning of heating surfaces; reduced sizes of boiler foundation. 1 dwg