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System and method for monitoring HVAC system operation

  • US 9,506,666 B2
  • Filed: 06/13/2013
  • Issued: 11/29/2016
  • Est. Priority Date: 06/13/2013
  • Status: Active Grant
First Claim
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1. A comfort controller in an HVAC system, the comfort controller comprising:

  • a processor configured to;

    receive actual run time length information from a sensor installed in the HVAC system;

    compare (1) a frequency of actual run time lengths of the HVAC system to a frequency of corresponding benchmark run time lengths and (2) an actual static pressure of the HVAC system to a benchmark static pressure;

    determine that the HVAC system has an improper configuration when at least one of the frequency of actual run time lengths and the actual static pressure are outside a specified range of their associated benchmarks;

    calculate an amount of excessive electricity used during the actual run time lengths compared to an amount of electricity expected to be used during the corresponding benchmark run time lengths when the frequency of actual run time lengths is greater than the frequency of corresponding benchmark run time lengths;

    calculate a cost of using the excessive electricity using the calculated amount of excessive electricity and a known cost of electricity; and

    display in a report card the results of the comparison and at least one of the amount of excessive electricity and the cost of using the excessive electricity on at least one of the comfort controller and a device in a network to which the comfort controller is connected.

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