Stoves and furnaces – Liquid heater – Boiler receiving hot liquid or steam from stove or furnace
Patent
1987-08-03
1989-04-25
Green, Randall L.
Stoves and furnaces
Liquid heater
Boiler receiving hot liquid or steam from stove or furnace
122 17, 126365, F24H 100, F22B 500
Patent
active
048237701
ABSTRACT:
A combination space heating and tankless hot water heater includes a vertical closed tank, having upper and lower ends, adapted to hold a large reservoir of liquid heat transfer medium therewithin. A high-efficiency gas/liquid heat exchanger, having upper and lower ends, is disposed within the tank, with the upper end of the gas/liquid heat exchanger at the upper end of the tank and the lower end of the gas/liquid heat exchanger at the lower end of the tank. A burner is disposed at the lower end of the gas/liquid heat exchanger to provide hot gases to flow upwards through the gas/liquid heat exchanger for transfer of heat from the gases across the walls of the gas/liquid heat exchanger and to the heat transfer medium. Means for withdrawing and returning the heat transfer medium from and to the tank for forced circulation for space heating are provided and a heat exchanger is disposed within said tank for receiving cold water and supplying domestic hot water. By means of proper combustion air flow management, including a unique arrangement of combustion air paths, large efficient heat exchange area, and efficient insulation, close to the theoretical limit of efficiency is obtained for a noncondensing embodiment described. In a preferred embodiment, the unit is constructed entirely of stainless steel, except for the domestic hot water heat exchanger which is fabricated of copper or copper alloy.
REFERENCES:
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Crozier John H.
Green Randall L.
Logical Heating Systems, Inc.
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