Gas-fired water heater with separable heat exchanger or detachably connected external water heater
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United States of America Patent
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Jun 30, 2015
Grant Date -
Sep 6, 2012
app pub date -
Mar 20, 2012
filing date -
Sep 21, 2010
priority date (Note) -
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Abstract
A hot water heater, particularly but not exclusively for domestic use, is herein described and having removably secured thereto a modular heat exchanger or an external water heater to heat the water in a separate tank portion. The two are easily separable from one another for service, repair or interchange. The air-to-air heat exchanger extracts heat loss from the central flue of a gas fired water heater to provide a source of heat for the building in which the hot water heater is installed. The external water heater is provided with a gas-fired burner for heating water from the tank circulated in a heat exchanger to transfer heat from a fluid heated by the burner and circulated in the heat exchanger to transfer the heat to water circulated from the water tank.
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