Furnace
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United States of America Patent
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Feb 6, 2024
Grant Date -
Oct 1, 2020
app pub date -
Jun 15, 2020
filing date -
Aug 25, 2016
priority date (Note) -
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Abstract
A furnace including a combustion chamber for burning fuel can have increased fuel burning efficiency, increased heating efficiency, and decreased harmful emissions of combustion byproducts. A combustion air delivery system delivers primary and secondary combustion air to the combustion chamber. Primary and secondary combustion air may be delivered at amounts that increase burning efficiency. An amount of secondary combustion air can be controlled by a valve system. A heat transfer device efficiently transfers heat from products of combustion for heating an enclosed space.
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