HOT-WATER BOILER Russian patent published in 1999 - IPC

FIELD: water heating systems for small buildings. SUBSTANCE: boiler includes several water chambers located one above another and flue tubes are vertically passed through them. Chambers are interconnected in succession so that overflow tube in each pair of adjacent chambers is connected with upper chamber at the top and with lower chamber from below. Pressure branch pipe of boiler connected with heating system is connected with lowest chamber at the top and return branch pipe is connected with highest chamber from below. EFFECT: reduced losses of heat into atmosphere due to reversing flow of water; reduced consumption of fuel. 1 dwg