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Method and apparatus for operating a furnace from a 12V DC battery

  • US 4,946,096 A
  • Filed: 12/11/1989
  • Issued: 08/07/1990
  • Est. Priority Date: 12/11/1989
  • Status: Expired due to Term
First Claim
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1. A method of operating on auxiliary power, a furnace of the type for use with an electrical power source that is susceptible to interruption and having blower and burner assemblies with each having high and low heat capabilities comprising the steps of:

  • sensing when power from the electric power source has been interrupted;

    connecting an auxiliary source of power to the furnace when said interruption is sensed; and

    substantially inhibiting the blower from operating in a high heat mode during the period of time in which the furnace is operating with auxiliary power.

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