APPARATUS FOR INDIVIDUAL HEATING Russian patent published in 1994 - IPC

FIELD: domestic heaters. SUBSTANCE: apparatus has sections provided with vertical heat exchanging passages 1 which have round cross-section, are in communication with manifold pipe 6 at the bottom part and provided with coaxial hollow inserts 2 having diameter which is equal to 0.5-0.7 of diameter of outer heat exchanging passage 1. The inserts form convective passages coupled with atmosphere. Electric heater 8 is received in the manifold pipe. Inlet branch pipe 9 of expansion tank 10 is connected to manifold pipe 6 above the electric heater. The tank is positioned inside hollow insert 2. Outlet branch pipe 11 of the expansion tank is connected to heat exchanging passage 1 at the top part of it. EFFECT: enhanced efficiency. 2 cl, 1 dwg