WATER BOILER FOR HEAT SUPPLY SYSTEM Russian patent published in 2008 - IPC F24H1/44 

FIELD: heat supply system.

SUBSTANCE: water boiler comprises housing made of two walls, furnace with a solid arch, door, ash grate, afterburning device, gas duct chambers formed by heat exchanging areas, and chimney. The gas duct chambers has shutters. The arch of the furnace is provided with the housing of the afterburning device provided with frames made of grids and three rows of openings made in the passage for supplying secondary air and ejector that passes through the gas duct chambers and heat exchanging areas and connecting the arch of the furnace with the chimney and having a bimetallic thermostat.

EFFECT: simplified servicing and enhanced efficiency.

3 cl, 1 dwg