System and method for calculating the thermal mass of a building

  • US 8,886,488 B2
  • Filed: 03/01/2012
  • Issued: 11/11/2014
  • Est. Priority Date: 09/17/2007
  • Status: Active Grant
First Claim
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1. A system for calculating a value for the operational efficiency of a heating, ventilation and air conditioning (HVAC) system comprising:

  • at least one HVAC control system that receives inside temperature measurements from at least a first location conditioned by at least one HVAC system;

    one or more databases that store at least said temperatures measured at said first location over time;

    one or more processors comprising computer hardware that is configured to receive outside temperature measurements from at least one source other than said HVAC system, wherein said one or more processors are configured to calculate one or more predicted rates of change in said inside temperature measurements at said first location based on the status of the HVAC system and to relate said one or more predicted rates of change to said outside temperature measurements; and

    said one or more processors further configured to compare at least one predicted temperature based on the one or more predicted rates of change, with an actual inside temperature measurement.

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