SOLAR HEATING SYSTEM WITH BACK-UP HEATING
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United States of America Patent
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app pub date -
Dec 9, 2008
filing date -
Aug 12, 2008
priority date (Note) -
Abandoned
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Abstract
A water heater is disclosed. The water heater includes a water storage tank and a heat source positioned to heat water within the water storage tank. A heat exchanger is positioned within the bottom end portion of the water storage tank. The heat exchanger is configured to contain a fluid medium for heat exchange with water in the bottom end portion of the water storage tank. A temperature sensor is positioned at an elevation above the heat exchanger for sensing a temperature of water within the tank. A control system is configured to selectively activate the heat source as a function of the water temperature sensed by the temperature sensor. The heat source can be either a heating element positioned within the water storage tank, or a burner positioned to deliver products of combustion into a flue positioned within the tank for heating water within the water storage tank.
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