Compensating for Gas Applicance De-Rate at High Altitudes
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United States of America Patent
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Issued Date -
Feb 21, 2013
app pub date -
Jun 13, 2012
filing date -
Aug 17, 2011
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Abstract
Apparatus and methods are provided for compensating for high altitude reduction in the heating capacity of a gas heating appliance, illustratively a gas-fired heating furnace. In a representative embodiment of such apparatus and methods the regulated pressure of the furnace gas valve, and the speeds of its combustion and indoor blowers, are coordinatingly increased to provide the furnace with a substantially unchanged maximum heating output despite its new higher altitude location.
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