FIELD: power engineering.
SUBSTANCE: water heater comprises the housing with built-in the furnace fire chamber, burner fitted at the housing top section to emit the flame into fire chamber and water tank heat exchanger. The latter has top and bottom multistage grates. Every stage of top grate in direct contact with the furnace flame. Lower grate features stepwise configuration similar to said top grate. Thus all tiers composed between appropriate stages of the het exchanger top an bottom grates feature equal height while fire tubes extending through top and bottom grates feature equal length.
EFFECT: higher efficiency, uniform heat transfer of combusted fuel.
4 cl, 4 dwg
