HOUSEHOLD FURNACE Russian patent published in 1996 - IPC

FIELD: heating of rooms, preparation of meal and heating of water. SUBSTANCE: furnace has fire-tube boiler with horizontal and vertical parts. Cleaning the boiler is effected through special hatches of simple form. Inner surface of boiler are enamelled to increase its service life. Enamel slip is sintered during first firing-up of boiler without water due to rational selection of fire-tube furnace, horizontal portion of boiler stack of elbow pipes and passages embracing the oven and vertical portion of boiler from stack of rectilinear tubes. Sections of tubes in stacks are correlated with flue gas temperature. EFFECT: enhanced efficiency. 6 cl, 5 dwg