System and method for evaluating changes in the efficiency of an hvac system

Abstract

The invention comprises systems and methods for evaluating changes in the operational efficiency of an HVAC system over time. The climate control system obtains temperature measurements from at least a first location conditioned by the climate system, and status of said HVAC system. One or more processors receives measurements of outside temperatures from at least one source other than said HVAC system and compares said temperature measurements from said first location with expected temperature measurements. The expected temperature measurements are based at least in part upon past temperature measurements.

What is claimed is: 
     
         1 . A system for controlling an HVAC system at a user's building, the system comprising:
 a memory; and   one or more processors;   the one or more processors configured to receive a first data from at least one sensor, wherein the first data from the at least one sensor includes a measurement of at least one characteristic of the user's building;   the one or more processors further configured to receive a second data from a network connection, wherein the second data from the network connection is collected from a source external to the building;   the one or more processors further configured to receive a first temperature setpoint for the building, wherein the first setpoint includes a temperature value and a time value;   the one or more processors further configured to predict, based at least on the first data from the sensor, the second data from the network connection, and the first temperature setpoint, the time necessary for the HVAC system to operate in order to reach the temperature value by the time value; and   the one or more processors further configured to control the HVAC system to operate to cause the building to reach the temperature value by the time value.