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HVAC control

  • US 20110264279A1
  • Filed: 04/25/2011
  • Published: 10/27/2011
  • Est. Priority Date: 04/23/2010
  • Status: Abandoned Application
First Claim
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1. A method of monitoring HVAC usage, comprising:

  • maintaining a data structure in an on board memory of a programmable usage monitoring HVAC thermostat;

    receiving an initiation signal from a relay;

    receiving a termination signal from the relay; and

    updating the data structure by adding a duration in units of time to an accumulated time associated with the relay to keep a log of the elapsed time a function associated with the relay was operative.

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